[{"citation":{"mla":"Roeder, Franz, et al. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i>, vol. 25, no. 3, 034031, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>.","bibtex":"@article{Roeder_Pollmann_Quiring_Eigner_Brecht_Silberhorn_2026, title={Toward integrated sensors for optimized optical coherence tomography with undetected photons}, volume={25}, DOI={<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>}, number={3034031}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Quiring, Viktor and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }","ama":"Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>. 2026;25(3). doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>","ieee":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, and C. Silberhorn, “Toward integrated sensors for optimized optical coherence tomography with undetected photons,” <i>Physical Review Applied</i>, vol. 25, no. 3, Art. no. 034031, 2026, doi: <a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>.","apa":"Roeder, F., Pollmann, R., Quiring, V., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2026). Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>, <i>25</i>(3), Article 034031. <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>","chicago":"Roeder, Franz, René Pollmann, Viktor Quiring, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i> 25, no. 3 (2026). <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>.","short":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn, Physical Review Applied 25 (2026)."},"status":"public","_id":"65094","publisher":"American Physical Society (APS)","user_id":"27150","volume":25,"issue":"3","publication":"Physical Review Applied","abstract":[{"text":"<jats:p>\r\n                    The development of practical sensors for optical coherence tomography (OCT) with undetected photons requires miniaturization via integration. To be practical, these sensors must exhibit a large spectral bandwidth and a high brightness, which are linked to a high axial resolution and a sufficient signal-to-noise ratio, respectively. Here, we combine these requirements in a scheme for OCT measurements with undetected photons based on nonlinear\r\n                    <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <a:mi>Ti</a:mi>\r\n                      <a:mo>:</a:mo>\r\n                      <a:msub>\r\n                        <a:mrow>\r\n                          <a:mi>Li</a:mi>\r\n                          <a:mi>Nb</a:mi>\r\n                          <a:mi mathvariant=\"normal\">O</a:mi>\r\n                        </a:mrow>\r\n                        <a:mn>3</a:mn>\r\n                      </a:msub>\r\n                    </a:math>\r\n                    waveguides. We investigate the performance benchmarks of the commonly used SU(1,1) scheme in comparison to an induced-coherence scheme and find that the latter is actually better suited when implementing measurements with undetected photons in integrated systems. In both schemes, we perform pump-gain optimization and OCT measurements with undetected photons with an axial resolution as low as\r\n                    <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <d:mn>28</d:mn>\r\n                      <d:mspace width=\"0.2em\"/>\r\n                      <d:mtext fontfamily=\"times\">μ</d:mtext>\r\n                      <d:mrow>\r\n                        <d:mi mathvariant=\"normal\">m</d:mi>\r\n                      </d:mrow>\r\n                    </d:math>\r\n                    .\r\n                  </jats:p>","lang":"eng"}],"date_created":"2026-03-23T12:28:33Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"title":"Toward integrated sensors for optimized optical coherence tomography with undetected photons","year":"2026","author":[{"full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz","id":"88149"},{"last_name":"Pollmann","first_name":"René","full_name":"Pollmann, René","id":"78890"},{"full_name":"Quiring, Viktor","first_name":"Viktor","last_name":"Quiring"},{"id":"13244","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof","full_name":"Eigner, Christof"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2331-7019"]},"date_updated":"2026-03-25T07:59:04Z","publication_status":"published","intvolume":"        25","article_number":"034031","language":[{"iso":"eng"}],"doi":"10.1103/cwsx-42c4"},{"doi":"10.1364/optica.579459","article_number":"548","language":[{"iso":"eng"}],"date_updated":"2026-03-25T07:59:23Z","publication_status":"published","intvolume":"        13","title":"Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals","year":"2026","author":[{"id":"88605","full_name":"Folge, Patrick Fabian","last_name":"Folge","first_name":"Patrick Fabian"},{"id":"88242","full_name":"Serino, Laura Maria","first_name":"Laura Maria","last_name":"Serino"},{"last_name":"Mišta","first_name":"Ladislav","full_name":"Mišta, Ladislav"},{"id":"27150","full_name":"Brecht, Benjamin","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"},{"full_name":"Řeháček, Jaroslav","first_name":"Jaroslav","last_name":"Řeháček"},{"full_name":"Hradil, Zdeněk","last_name":"Hradil","first_name":"Zdeněk"}],"publication_identifier":{"issn":["2334-2536"]},"type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-03-23T12:30:02Z","abstract":[{"lang":"eng","text":"<jats:p>\r\n                    Precise measurements of both the arrival time and carrier frequency of light pulses are essential for time–frequency-encoded quantum technologies. Quantum mechanics, however, imposes fundamental limits on the simultaneous determination of these quantities. In this work, we derive and experimentally verify the quantum uncertainty bounds governing joint time–frequency measurements. We show that when detection is restricted to finite time windows, the problem is naturally described by a quantum rotor, rendering the commonly used Heisenberg uncertainty relation inapplicable. We further propose an optimal detection scheme that saturates these fundamental limits. By sampling the\r\n                    <jats:italic toggle=\"yes\">Q</jats:italic>\r\n                    -function, we demonstrate the reconstruction of the Wigner function beyond the harmonic oscillator. Using an experimental implementation based on a quantum pulse gate, we confirm that the proposed scheme approaches the ultimate quantum limit for simultaneous time–frequency measurements. These results provide a framework for joint time–frequency detection with direct implications for precision measurements and quantum information processing.\r\n                  </jats:p>"}],"issue":"3","publication":"Optica","user_id":"27150","volume":13,"publisher":"Optica Publishing Group","_id":"65096","status":"public","citation":{"bibtex":"@article{Folge_Serino_Mišta_Brecht_Silberhorn_Řeháček_Hradil_2026, title={Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals}, volume={13}, DOI={<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>}, number={3548}, journal={Optica}, publisher={Optica Publishing Group}, author={Folge, Patrick Fabian and Serino, Laura Maria and Mišta, Ladislav and Brecht, Benjamin and Silberhorn, Christine and Řeháček, Jaroslav and Hradil, Zdeněk}, year={2026} }","ama":"Folge PF, Serino LM, Mišta L, et al. Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. <i>Optica</i>. 2026;13(3). doi:<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>","mla":"Folge, Patrick Fabian, et al. “Quantum-Limited Detection of the Arrival Time and the Carrier Frequency of Time-Dependent Signals.” <i>Optica</i>, vol. 13, no. 3, 548, Optica Publishing Group, 2026, doi:<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>.","short":"P.F. Folge, L.M. Serino, L. Mišta, B. Brecht, C. Silberhorn, J. Řeháček, Z. Hradil, Optica 13 (2026).","chicago":"Folge, Patrick Fabian, Laura Maria Serino, Ladislav Mišta, Benjamin Brecht, Christine Silberhorn, Jaroslav Řeháček, and Zdeněk Hradil. “Quantum-Limited Detection of the Arrival Time and the Carrier Frequency of Time-Dependent Signals.” <i>Optica</i> 13, no. 3 (2026). <a href=\"https://doi.org/10.1364/optica.579459\">https://doi.org/10.1364/optica.579459</a>.","ieee":"P. F. Folge <i>et al.</i>, “Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals,” <i>Optica</i>, vol. 13, no. 3, Art. no. 548, 2026, doi: <a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>.","apa":"Folge, P. F., Serino, L. M., Mišta, L., Brecht, B., Silberhorn, C., Řeháček, J., &#38; Hradil, Z. (2026). Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. <i>Optica</i>, <i>13</i>(3), Article 548. <a href=\"https://doi.org/10.1364/optica.579459\">https://doi.org/10.1364/optica.579459</a>"}},{"status":"public","_id":"63451","publisher":"AIP Publishing","user_id":"27150","volume":3,"citation":{"mla":"Schapeler, Timon, et al. “Practical Considerations for Assignment of Photon Numbers with SNSPDs.” <i>APL Quantum</i>, vol. 3, no. 1, 016102, AIP Publishing, 2026, doi:<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>.","ama":"Schapeler T, Mischke I, Schlue F, et al. Practical considerations for assignment of photon numbers with SNSPDs. <i>APL Quantum</i>. 2026;3(1). doi:<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>","bibtex":"@article{Schapeler_Mischke_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2026, title={Practical considerations for assignment of photon numbers with SNSPDs}, volume={3}, DOI={<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>}, number={1016102}, journal={APL Quantum}, publisher={AIP Publishing}, author={Schapeler, Timon and Mischke, Isabell and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, year={2026} }","apa":"Schapeler, T., Mischke, I., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., &#38; Bartley, T. (2026). Practical considerations for assignment of photon numbers with SNSPDs. <i>APL Quantum</i>, <i>3</i>(1), Article 016102. <a href=\"https://doi.org/10.1063/5.0304127\">https://doi.org/10.1063/5.0304127</a>","ieee":"T. Schapeler <i>et al.</i>, “Practical considerations for assignment of photon numbers with SNSPDs,” <i>APL Quantum</i>, vol. 3, no. 1, Art. no. 016102, 2026, doi: <a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>.","short":"T. Schapeler, I. Mischke, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, APL Quantum 3 (2026).","chicago":"Schapeler, Timon, Isabell Mischke, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Practical Considerations for Assignment of Photon Numbers with SNSPDs.” <i>APL Quantum</i> 3, no. 1 (2026). <a href=\"https://doi.org/10.1063/5.0304127\">https://doi.org/10.1063/5.0304127</a>."},"project":[{"_id":"191","name":"PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform"},{"name":"ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications","_id":"239"}],"oa":"1","year":"2026","title":"Practical considerations for assignment of photon numbers with SNSPDs","publication_identifier":{"issn":["2835-0103"]},"author":[{"id":"55629","orcid":"0000-0001-7652-1716","last_name":"Schapeler","first_name":"Timon","full_name":"Schapeler, Timon"},{"full_name":"Mischke, Isabell","last_name":"Mischke","first_name":"Isabell"},{"id":"63579","last_name":"Schlue","first_name":"Fabian","full_name":"Schlue, Fabian"},{"full_name":"Stefszky, Michael","first_name":"Michael","last_name":"Stefszky","id":"42777"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 "},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"},{"id":"49683","last_name":"Bartley","first_name":"Tim","full_name":"Bartley, Tim"}],"date_updated":"2026-03-25T08:00:27Z","publication_status":"published","intvolume":"         3","main_file_link":[{"open_access":"1"}],"article_number":"016102","language":[{"iso":"eng"}],"doi":"10.1063/5.0304127","publication":"APL Quantum","issue":"1","abstract":[{"lang":"eng","text":"<jats:p>Superconducting nanowire single-photon detectors (SNSPDs) can enable photon-number resolution (PNR) based on accurate measurements of the detector’s response time to few-photon optical pulses. In this work, we investigate the impact of the optical pulse shape and duration on the accuracy of this method. We find that Gaussian temporal pulse shapes yield cleaner arrival-time histograms and, thus, more accurate PNR, compared to bandpass-filtered pulses of equal bandwidth. For low system jitter and an optical pulse duration comparable to the other jitter contributions, photon numbers can be discriminated in our system with a commercial SNSPD. At 60 ps optical pulse duration, photon-number discrimination is significantly reduced. Furthermore, we highlight the importance of using the correct arrival-time histogram model when analyzing photon-number assignment. Using exponentially modified Gaussian distributions, instead of the commonly used Gaussian distributions, we can more accurately determine photon-number misidentification probabilities. Finally, we reconstruct the positive operator-valued measures of the detector, revealing sharp features that indicate the intrinsic PNR capabilities.</jats:p>"}],"date_created":"2026-01-05T10:00:58Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}]},{"citation":{"ieee":"L. M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, and C. Silberhorn, “Experimental entropic uncertainty relations in dimensions three to five,” <i>Physical Review A</i>, vol. 113, no. 3, Art. no. 032420, 2026, doi: <a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>.","apa":"Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., &#38; Silberhorn, C. (2026). Experimental entropic uncertainty relations in dimensions three to five. <i>Physical Review A</i>, <i>113</i>(3), Article 032420. <a href=\"https://doi.org/10.1103/f6c4-jtlc\">https://doi.org/10.1103/f6c4-jtlc</a>","mla":"Serino, Laura Maria, et al. “Experimental Entropic Uncertainty Relations in Dimensions Three to Five.” <i>Physical Review A</i>, vol. 113, no. 3, 032420, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>.","bibtex":"@article{Serino_Chesi_Brecht_Maccone_Macchiavello_Silberhorn_2026, title={Experimental entropic uncertainty relations in dimensions three to five}, volume={113}, DOI={<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>}, number={3032420}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Serino, Laura Maria and Chesi, Giovanni and Brecht, Benjamin and Maccone, Lorenzo and Macchiavello, Chiara and Silberhorn, Christine}, year={2026} }","chicago":"Serino, Laura Maria, Giovanni Chesi, Benjamin Brecht, Lorenzo Maccone, Chiara Macchiavello, and Christine Silberhorn. “Experimental Entropic Uncertainty Relations in Dimensions Three to Five.” <i>Physical Review A</i> 113, no. 3 (2026). <a href=\"https://doi.org/10.1103/f6c4-jtlc\">https://doi.org/10.1103/f6c4-jtlc</a>.","short":"L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review A 113 (2026).","ama":"Serino LM, Chesi G, Brecht B, Maccone L, Macchiavello C, Silberhorn C. Experimental entropic uncertainty relations in dimensions three to five. <i>Physical Review A</i>. 2026;113(3). doi:<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>"},"volume":113,"user_id":"27150","_id":"65095","publisher":"American Physical Society (APS)","status":"public","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-03-23T12:29:23Z","abstract":[{"lang":"eng","text":"<jats:p>\r\n                    We provide experimental validation of tight entropic uncertainty relations for the Shannon entropies of observables with mutually unbiased eigenstates in high dimensions. In particular, we address the cases of dimensions\r\n                    <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\">\r\n                      <a:mrow>\r\n                        <a:mi>d</a:mi>\r\n                        <a:mo>=</a:mo>\r\n                        <a:mn>3</a:mn>\r\n                      </a:mrow>\r\n                    </a:math>\r\n                    , 4, and 5 and consider from 2 to\r\n                    <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\">\r\n                      <b:mrow>\r\n                        <b:mi>d</b:mi>\r\n                        <b:mo>+</b:mo>\r\n                        <b:mn>1</b:mn>\r\n                      </b:mrow>\r\n                    </b:math>\r\n                    mutually unbiased bases. The experiment is based on pulsed frequency bins measured with a multioutput quantum pulse gate, which can perform projective measurements on a complete high-dimensional basis in the time-frequency domain. Our results fit the theoretical predictions: the bound on the sum of the entropies is never violated and is saturated by the states that minimize the uncertainty relations.\r\n                  </jats:p>"}],"issue":"3","publication":"Physical Review A","doi":"10.1103/f6c4-jtlc","language":[{"iso":"eng"}],"article_number":"032420","intvolume":"       113","publication_status":"published","date_updated":"2026-03-25T07:59:36Z","author":[{"id":"88242","full_name":"Serino, Laura Maria","last_name":"Serino","first_name":"Laura Maria"},{"full_name":"Chesi, Giovanni","last_name":"Chesi","first_name":"Giovanni"},{"id":"27150","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin"},{"last_name":"Maccone","first_name":"Lorenzo","full_name":"Maccone, Lorenzo"},{"first_name":"Chiara","last_name":"Macchiavello","full_name":"Macchiavello, Chiara"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"title":"Experimental entropic uncertainty relations in dimensions three to five","year":"2026"},{"language":[{"iso":"eng"}],"article_number":"054011","doi":"10.1103/x99y-2sms","publication_identifier":{"issn":["2331-7019"]},"author":[{"last_name":"Lammers","first_name":"Jonas","full_name":"Lammers, Jonas"},{"first_name":"Laura","last_name":"Ares","full_name":"Ares, Laura"},{"id":"88928","first_name":"Federico","last_name":"Pegoraro","full_name":"Pegoraro, Federico"},{"full_name":"Held, Philip","last_name":"Held","first_name":"Philip","id":"68236"},{"id":"27150","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin"},{"first_name":"Jan","last_name":"Sperling","orcid":"0000-0002-5844-3205","full_name":"Sperling, Jan","id":"75127"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"title":"Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures","year":"2026","intvolume":"        25","date_updated":"2026-05-07T07:01:09Z","publication_status":"published","date_created":"2026-05-07T07:00:08Z","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"}],"type":"journal_article","issue":"5","publication":"Physical Review Applied","abstract":[{"text":"<jats:p>For the ever-growing field of quantum information processing, large-scale, efficient multiport interferometers serving as photonic processors are required. In this context, the suitability of quantum walks as the interferometric base for universal computation has been theoretically proven. In this work, we bridge the gap between theoretical proposals and state-of-the-art experimental capabilities by providing the recipe for the implementation of a universal photonic processor in discrete-time quantum walks. Specifically, we present the protocol for translating arbitrary linear transformations into the coin and step operator of a quantum walk and map these to the experimental parameters of the established time-multiplexed platform [A. Schreiber , Phys. Rev. Lett. , 050502 (2010)]. We show that our interface is highly scalable and resource efficient due to the hybrid encoding consisting of multiple degrees of freedom. Finally, we prove that our system is highly resilient against experimental imperfections and show that it compares favorably against existing architectures.</jats:p>","lang":"eng"}],"publisher":"American Physical Society (APS)","_id":"65575","volume":25,"user_id":"75127","status":"public","citation":{"bibtex":"@article{Lammers_Ares_Pegoraro_Held_Brecht_Sperling_Silberhorn_2026, title={Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures}, volume={25}, DOI={<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>}, number={5054011}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Lammers, Jonas and Ares, Laura and Pegoraro, Federico and Held, Philip and Brecht, Benjamin and Sperling, Jan and Silberhorn, Christine}, year={2026} }","ama":"Lammers J, Ares L, Pegoraro F, et al. Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures. <i>Physical Review Applied</i>. 2026;25(5). doi:<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>","mla":"Lammers, Jonas, et al. “Resource-Efficient Universal Photonic Processors Based on Time-Multiplexed Hybrid Architectures.” <i>Physical Review Applied</i>, vol. 25, no. 5, 054011, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>.","chicago":"Lammers, Jonas, Laura Ares, Federico Pegoraro, Philip Held, Benjamin Brecht, Jan Sperling, and Christine Silberhorn. “Resource-Efficient Universal Photonic Processors Based on Time-Multiplexed Hybrid Architectures.” <i>Physical Review Applied</i> 25, no. 5 (2026). <a href=\"https://doi.org/10.1103/x99y-2sms\">https://doi.org/10.1103/x99y-2sms</a>.","short":"J. Lammers, L. Ares, F. Pegoraro, P. Held, B. Brecht, J. Sperling, C. Silberhorn, Physical Review Applied 25 (2026).","ieee":"J. Lammers <i>et al.</i>, “Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures,” <i>Physical Review Applied</i>, vol. 25, no. 5, Art. no. 054011, 2026, doi: <a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>.","apa":"Lammers, J., Ares, L., Pegoraro, F., Held, P., Brecht, B., Sperling, J., &#38; Silberhorn, C. (2026). Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures. <i>Physical Review Applied</i>, <i>25</i>(5), Article 054011. <a href=\"https://doi.org/10.1103/x99y-2sms\">https://doi.org/10.1103/x99y-2sms</a>"}},{"publication":"npj Quantum Information","issue":"1","abstract":[{"lang":"eng","text":"Simulating vibronic spectra is a central task in physical chemistry, offering insight into important properties of molecules. Recently, it has been experimentally demonstrated that photonic platforms based on Gaussian boson sampling (GBS) are capable of performing these simulations. However, whether an actual GBS approach is required depends on the molecule under investigation. To develop a better understanding on the requirements for simulating vibronic spectra, we explore connections between theoretical approximations in physical chemistry and their photonic counterparts. Mapping these approximations into photonics, we show that for certain molecules the GBS approach is unnecessary. We place special emphasis on the linear coupling approximation, which in photonics corresponds to sampling from multiple coherent states. By implementing this approach in experiments, we demonstrate improved similarities over previously reported GBS results for formic acid and identify the particular attributes that a molecule must exhibit for this, and other approximations, to be valid. These results highlight the importance in forming deeper connections between traditional methods and photonic approaches."}],"related_material":{"link":[{"relation":"research_data","url":"https://doi.org/10.5281/zenodo.18969354"}]},"date_created":"2026-06-12T08:14:35Z","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"title":"Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra","year":"2026","author":[{"id":"73665","full_name":"Eickmann, Jan-Lucas","first_name":"Jan-Lucas","last_name":"Eickmann","orcid":"0009-0008-6524-7684"},{"id":"36389","first_name":"Kai-Hong","orcid":"0000-0003-1008-4976","last_name":"Luo","full_name":"Luo, Kai-Hong"},{"id":"114114","full_name":"Roiz, Mikhail","last_name":"Roiz","first_name":"Mikhail"},{"last_name":"Lammers","first_name":"Jonas","full_name":"Lammers, Jonas"},{"first_name":"Simone","last_name":"Atzeni","full_name":"Atzeni, Simone","id":"98338"},{"last_name":"Pandey","first_name":"Cheeranjiv","full_name":"Pandey, Cheeranjiv"},{"full_name":"Lütkewitte, Florian","last_name":"Lütkewitte","first_name":"Florian"},{"full_name":"Shirazi, Reza G.","first_name":"Reza G.","last_name":"Shirazi"},{"full_name":"Schlue, Fabian","first_name":"Fabian","last_name":"Schlue","id":"63579"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 "},{"full_name":"Rybkin, Vladimir V.","last_name":"Rybkin","first_name":"Vladimir V."},{"id":"42777","full_name":"Stefszky, Michael","last_name":"Stefszky","first_name":"Michael"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2056-6387"]},"date_updated":"2026-06-12T08:28:02Z","publication_status":"published","intvolume":"        12","article_type":"original","main_file_link":[{"open_access":"1","url":"https://www.nature.com/articles/s41534-026-01250-x.pdf"}],"article_number":"89","language":[{"iso":"eng"}],"doi":"10.1038/s41534-026-01250-x","citation":{"mla":"Eickmann, Jan-Lucas, et al. “Bridging Chemistry and Gaussian Boson Sampling: A Photonic Hierarchy of Approximations for Molecular Vibronic Spectra.” <i>Npj Quantum Information</i>, vol. 12, no. 1, 89, Springer Science and Business Media LLC, 2026, doi:<a href=\"https://doi.org/10.1038/s41534-026-01250-x\">10.1038/s41534-026-01250-x</a>.","ama":"Eickmann J-L, Luo K-H, Roiz M, et al. Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra. <i>npj Quantum Information</i>. 2026;12(1). doi:<a href=\"https://doi.org/10.1038/s41534-026-01250-x\">10.1038/s41534-026-01250-x</a>","bibtex":"@article{Eickmann_Luo_Roiz_Lammers_Atzeni_Pandey_Lütkewitte_Shirazi_Schlue_Brecht_et al._2026, title={Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra}, volume={12}, DOI={<a href=\"https://doi.org/10.1038/s41534-026-01250-x\">10.1038/s41534-026-01250-x</a>}, number={189}, journal={npj Quantum Information}, publisher={Springer Science and Business Media LLC}, author={Eickmann, Jan-Lucas and Luo, Kai-Hong and Roiz, Mikhail and Lammers, Jonas and Atzeni, Simone and Pandey, Cheeranjiv and Lütkewitte, Florian and Shirazi, Reza G. and Schlue, Fabian and Brecht, Benjamin and et al.}, year={2026} }","apa":"Eickmann, J.-L., Luo, K.-H., Roiz, M., Lammers, J., Atzeni, S., Pandey, C., Lütkewitte, F., Shirazi, R. G., Schlue, F., Brecht, B., Rybkin, V. V., Stefszky, M., &#38; Silberhorn, C. (2026). Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra. <i>Npj Quantum Information</i>, <i>12</i>(1), Article 89. <a href=\"https://doi.org/10.1038/s41534-026-01250-x\">https://doi.org/10.1038/s41534-026-01250-x</a>","ieee":"J.-L. Eickmann <i>et al.</i>, “Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra,” <i>npj Quantum Information</i>, vol. 12, no. 1, Art. no. 89, 2026, doi: <a href=\"https://doi.org/10.1038/s41534-026-01250-x\">10.1038/s41534-026-01250-x</a>.","chicago":"Eickmann, Jan-Lucas, Kai-Hong Luo, Mikhail Roiz, Jonas Lammers, Simone Atzeni, Cheeranjiv Pandey, Florian Lütkewitte, et al. “Bridging Chemistry and Gaussian Boson Sampling: A Photonic Hierarchy of Approximations for Molecular Vibronic Spectra.” <i>Npj Quantum Information</i> 12, no. 1 (2026). <a href=\"https://doi.org/10.1038/s41534-026-01250-x\">https://doi.org/10.1038/s41534-026-01250-x</a>.","short":"J.-L. Eickmann, K.-H. Luo, M. Roiz, J. Lammers, S. Atzeni, C. Pandey, F. Lütkewitte, R.G. Shirazi, F. Schlue, B. Brecht, V.V. Rybkin, M. Stefszky, C. Silberhorn, Npj Quantum Information 12 (2026)."},"project":[{"name":"PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform","_id":"191"}],"oa":"1","status":"public","publisher":"Springer Science and Business Media LLC","_id":"65847","user_id":"73665","volume":12},{"_id":"66583","publisher":"American Physical Society (APS)","volume":114,"user_id":"78890","status":"public","oa":"1","citation":{"apa":"Pollmann, R., Roeder, F., Silberhorn, C., &#38; Brecht, B. (2026). Limitations of entangled two-photon absorption detection. <i>Physical Review A</i>, <i>114</i>(1), Article 013718. <a href=\"https://doi.org/10.1103/qpb1-hk5l\">https://doi.org/10.1103/qpb1-hk5l</a>","ieee":"R. Pollmann, F. Roeder, C. Silberhorn, and B. Brecht, “Limitations of entangled two-photon absorption detection,” <i>Physical Review A</i>, vol. 114, no. 1, Art. no. 013718, 2026, doi: <a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>.","short":"R. Pollmann, F. Roeder, C. Silberhorn, B. Brecht, Physical Review A 114 (2026).","chicago":"Pollmann, René, Franz Roeder, Christine Silberhorn, and Benjamin Brecht. “Limitations of Entangled Two-Photon Absorption Detection.” <i>Physical Review A</i> 114, no. 1 (2026). <a href=\"https://doi.org/10.1103/qpb1-hk5l\">https://doi.org/10.1103/qpb1-hk5l</a>.","mla":"Pollmann, René, et al. “Limitations of Entangled Two-Photon Absorption Detection.” <i>Physical Review A</i>, vol. 114, no. 1, 013718, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>.","ama":"Pollmann R, Roeder F, Silberhorn C, Brecht B. Limitations of entangled two-photon absorption detection. <i>Physical Review A</i>. 2026;114(1). doi:<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>","bibtex":"@article{Pollmann_Roeder_Silberhorn_Brecht_2026, title={Limitations of entangled two-photon absorption detection}, volume={114}, DOI={<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>}, number={1013718}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Pollmann, René and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin}, year={2026} }"},"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://journals.aps.org/pra/abstract/10.1103/qpb1-hk5l","open_access":"1"}],"article_number":"013718","doi":"10.1103/qpb1-hk5l","author":[{"id":"78890","full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René"},{"id":"88149","full_name":"Roeder, Franz","first_name":"Franz","last_name":"Roeder"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"id":"27150","first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin"}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"year":"2026","title":"Limitations of entangled two-photon absorption detection","intvolume":"       114","article_type":"original","date_updated":"2026-07-24T11:00:08Z","publication_status":"published","date_created":"2026-07-24T10:53:18Z","department":[{"_id":"623"},{"_id":"15"}],"type":"journal_article","publication":"Physical Review A","issue":"1","abstract":[{"text":"We introduce a method for determining the sensitivity of any given entangled two-photon absorption (ETPA) measurement. By modeling all signal and noise contributions to the measurement, we derive a single numerical value that describes the sensitivity of the ETPA measurement in Göppert-Mayer units. This allows us to directly compare vastly different experimental approaches and determine whether ETPA will be detectable under the given conditions. Therefore we can quantify the effect of any change to a given experimental apparatus and identify the ideal optimization pathway.","lang":"eng"}]},{"doi":"10.1088/1367-2630/ae8692","language":[{"iso":"eng"}],"article_number":"074509","intvolume":"        28","publication_status":"published","date_updated":"2026-08-18T10:21:29Z","publication_identifier":{"issn":["1367-2630"]},"author":[{"first_name":"Martin","last_name":"Houde","full_name":"Houde, Martin"},{"id":"88149","full_name":"Roeder, Franz","first_name":"Franz","last_name":"Roeder"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","id":"27150"},{"full_name":"Quesada, Nicolás","first_name":"Nicolás","last_name":"Quesada"}],"title":"High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons","year":"2026","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-08-18T10:21:08Z","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    We study theoretically how high-gain effects affect the measurement outcome of visible signal spectra in undetected photon measurement schemes. We consider two interferometric configurations: firstly, the SU(1,1) interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers; secondly, the induced coherence interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers and where the second squeezer is seeded by the idler and a vacuum ancilla mode. Furthermore, we consider a distributed loss configuration where the idler incurs loss as it propagates in the nonlinear medium. Motivated by experimental evidence and due to the fact that broadband sources are ideal for these measurement schemes, we use the dispersive data of a third-order dispersion engineered integrated waveguide parametric down conversion (PDC) source presented in Roeder\r\n                    <jats:italic>et al</jats:italic>\r\n                    (2024 New J. Phys.\r\n                    <jats:bold>26</jats:bold>\r\n                    123025) to model the PDC spectra in the three configurations. For each configuration we consider the case of idler-only (i) absorption, (ii) additional dispersion, and (iii) the combined effects. We obtain results which outline the strength and weaknesses of the different configurations at different operation points.\r\n                  </jats:p>","lang":"eng"}],"issue":"7","publication":"New Journal of Physics","volume":28,"user_id":"27150","publisher":"IOP Publishing","_id":"66741","status":"public","citation":{"ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. <i>New Journal of Physics</i>. 2026;28(7). doi:<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>","bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons}, volume={28}, DOI={<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>}, number={7074509}, journal={New Journal of Physics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","mla":"Houde, Martin, et al. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” <i>New Journal of Physics</i>, vol. 28, no. 7, 074509, IOP Publishing, 2026, doi:<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, New Journal of Physics 28 (2026).","chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” <i>New Journal of Physics</i> 28, no. 7 (2026). <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">https://doi.org/10.1088/1367-2630/ae8692</a>.","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., &#38; Quesada, N. (2026). High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. <i>New Journal of Physics</i>, <i>28</i>(7), Article 074509. <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">https://doi.org/10.1088/1367-2630/ae8692</a>","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons,” <i>New Journal of Physics</i>, vol. 28, no. 7, Art. no. 074509, 2026, doi: <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>."}},{"_id":"66740","publisher":"IOP Publishing","volume":8,"user_id":"27150","status":"public","citation":{"bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={Quantum fisher information analysis for absorption measurements with undetected photons}, volume={8}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>}, number={3035013}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. Quantum fisher information analysis for absorption measurements with undetected photons. <i>Journal of Physics: Photonics</i>. 2026;8(3). doi:<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>","mla":"Houde, Martin, et al. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” <i>Journal of Physics: Photonics</i>, vol. 8, no. 3, 035013, IOP Publishing, 2026, doi:<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>.","chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” <i>Journal of Physics: Photonics</i> 8, no. 3 (2026). <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">https://doi.org/10.1088/2515-7647/ae82a2</a>.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, Journal of Physics: Photonics 8 (2026).","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “Quantum fisher information analysis for absorption measurements with undetected photons,” <i>Journal of Physics: Photonics</i>, vol. 8, no. 3, Art. no. 035013, 2026, doi: <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>.","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., &#38; Quesada, N. (2026). Quantum fisher information analysis for absorption measurements with undetected photons. <i>Journal of Physics: Photonics</i>, <i>8</i>(3), Article 035013. <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">https://doi.org/10.1088/2515-7647/ae82a2</a>"},"language":[{"iso":"eng"}],"article_number":"035013","doi":"10.1088/2515-7647/ae82a2","author":[{"first_name":"Martin","last_name":"Houde","full_name":"Houde, Martin"},{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"full_name":"Brecht, Benjamin","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","id":"27150"},{"full_name":"Quesada, Nicolás","last_name":"Quesada","first_name":"Nicolás"}],"publication_identifier":{"issn":["2515-7647"]},"year":"2026","title":"Quantum fisher information analysis for absorption measurements with undetected photons","intvolume":"         8","publication_status":"published","date_updated":"2026-08-18T10:20:54Z","date_created":"2026-08-18T10:20:21Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","publication":"Journal of Physics: Photonics","issue":"3","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    We theoretically compare the quantum Fisher information (QFI) for three configurations of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer with inter-source idler loss, an induced-coherence (IC) setup in which the idler partially seeds a second squeezer together with a vacuum ancilla, and a distributed-loss (DL) scheme with in-medium attenuation. We calculate the QFI as a function of parametric gain for both full and signal-only detection access. For losses below 99% and low to moderate gain, the SU(1,1) configuration provides the largest QFI. At high gain and intermediate loss, the IC scheme performs best, while under extreme attenuation (transmission\r\n                    <jats:inline-formula>\r\n                      <jats:tex-math>\r\n                        \r\n                      </jats:tex-math>\r\n                      <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                          <mml:mo>&lt;</mml:mo>\r\n                        </mml:mrow>\r\n                      </mml:math>\r\n                    </jats:inline-formula>\r\n                    1%) the DL model becomes optimal. These results delineate the measurement regimes in which each architecture is optimal in terms of information theory.\r\n                  </jats:p>"}]},{"publication_identifier":{"issn":["1094-4087"]},"author":[{"full_name":"Sewidan, Muhamed A.","last_name":"Sewidan","first_name":"Muhamed A."},{"full_name":"Rittmeier, Alexandra","first_name":"Alexandra","last_name":"Rittmeier"},{"first_name":"Laura","last_name":"Bollmers","full_name":"Bollmers, Laura","id":"61375"},{"id":"63231","orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","first_name":"Silia","full_name":"Babel, Silia"},{"first_name":"Elisavet","last_name":"Chatzizyrli","full_name":"Chatzizyrli, Elisavet"},{"full_name":"Duran Gomez, Juan S. S.","first_name":"Juan S. S.","last_name":"Duran Gomez"},{"full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura","id":"40300"},{"full_name":"Eigner, Christof","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"last_name":"Bremner","first_name":"Douglas","full_name":"Bremner, Douglas"},{"full_name":"Wienke, Andreas","last_name":"Wienke","first_name":"Andreas"},{"last_name":"Kracht","first_name":"Dietmar","full_name":"Kracht, Dietmar"},{"first_name":"Moritz","last_name":"Hinkelmann","full_name":"Hinkelmann, Moritz"},{"first_name":"Michael","last_name":"Kues","full_name":"Kues, Michael"}],"year":"2026","title":"High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide","article_type":"original","intvolume":"        34","publication_status":"published","date_updated":"2026-08-31T12:11:43Z","language":[{"iso":"eng"}],"article_number":"29244","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-34-16-29244"}],"doi":"10.1364/oe.596879","issue":"16","publication":"Optics Express","abstract":[{"text":"Integrated photon-pair sources, providing scalability solutions, are crucial for large-scale realizations of quantum photonic technologies. Their traditional fabrication techniques, such as etching, are often complex, require long development cycles, and are resource inefficient in case of fabrication imperfections or failures. The two-photon polymerization (2PP) technique can offer a rapid, efficient, and reproducible alternative for the fabrication of integrated photonic devices. Here, we demonstrate an integrated photon-pair source based on a 2PP-defined strip-loaded waveguide on a periodically poled thin-film lithium niobate (TFLN) platform. The device generates photon pairs through type-II spontaneous parametric down-conversion (SPDC), employing first-order quasi-phase matching (QPM) with TM-polarized excitation light. The device achieves an on-chip pair generation rate of 4.357 MHz and a coincidence-to-accidental ratio (CAR) of ∼404. To prove the flexibility and versatility of the fabrication technique, the waveguides were erased from the LN substrate and reprinted, reaching comparable performance. This work demonstrates the potential of 2PP as a rapid production technique for high-performance integrated photon-pair sources, offering a practical solution to the limitations of traditional fabrication techniques and showcasing both reproducibility of the fabrication and the reusability of the substrate.","lang":"eng"}],"date_created":"2026-08-31T12:02:48Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","status":"public","_id":"66877","publisher":"Optica Publishing Group","volume":34,"user_id":"63231","citation":{"ieee":"M. A. Sewidan <i>et al.</i>, “High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide,” <i>Optics Express</i>, vol. 34, no. 16, Art. no. 29244, 2026, doi: <a href=\"https://doi.org/10.1364/oe.596879\">10.1364/oe.596879</a>.","apa":"Sewidan, M. A., Rittmeier, A., Bollmers, L., Babel, S., Chatzizyrli, E., Duran Gomez, J. S. S., Padberg, L., Eigner, C., Silberhorn, C., Bremner, D., Wienke, A., Kracht, D., Hinkelmann, M., &#38; Kues, M. (2026). High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide. <i>Optics Express</i>, <i>34</i>(16), Article 29244. <a href=\"https://doi.org/10.1364/oe.596879\">https://doi.org/10.1364/oe.596879</a>","chicago":"Sewidan, Muhamed A., Alexandra Rittmeier, Laura Bollmers, Silia Babel, Elisavet Chatzizyrli, Juan S. S. Duran Gomez, Laura Padberg, et al. “High-Performance Photon-Pair Source Using a Two-Photon-Polymerized Strip-Loaded Lithium Niobate Waveguide.” <i>Optics Express</i> 34, no. 16 (2026). <a href=\"https://doi.org/10.1364/oe.596879\">https://doi.org/10.1364/oe.596879</a>.","short":"M.A. Sewidan, A. Rittmeier, L. Bollmers, S. Babel, E. Chatzizyrli, J.S.S. Duran Gomez, L. Padberg, C. Eigner, C. Silberhorn, D. Bremner, A. Wienke, D. Kracht, M. Hinkelmann, M. Kues, Optics Express 34 (2026).","mla":"Sewidan, Muhamed A., et al. “High-Performance Photon-Pair Source Using a Two-Photon-Polymerized Strip-Loaded Lithium Niobate Waveguide.” <i>Optics Express</i>, vol. 34, no. 16, 29244, Optica Publishing Group, 2026, doi:<a href=\"https://doi.org/10.1364/oe.596879\">10.1364/oe.596879</a>.","bibtex":"@article{Sewidan_Rittmeier_Bollmers_Babel_Chatzizyrli_Duran Gomez_Padberg_Eigner_Silberhorn_Bremner_et al._2026, title={High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide}, volume={34}, DOI={<a href=\"https://doi.org/10.1364/oe.596879\">10.1364/oe.596879</a>}, number={1629244}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Sewidan, Muhamed A. and Rittmeier, Alexandra and Bollmers, Laura and Babel, Silia and Chatzizyrli, Elisavet and Duran Gomez, Juan S. S. and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Bremner, Douglas and et al.}, year={2026} }","ama":"Sewidan MA, Rittmeier A, Bollmers L, et al. High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide. <i>Optics Express</i>. 2026;34(16). doi:<a href=\"https://doi.org/10.1364/oe.596879\">10.1364/oe.596879</a>"},"oa":"1"},{"citation":{"bibtex":"@article{Roeder_Rüsing_Hehemann_Gnanavel_Eigner_Brecht_Imlau_Silberhorn_2026, title={Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes}, volume={16}, DOI={<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>}, number={82668}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Roeder, Franz and Rüsing, Michael and Hehemann, Tobias and Gnanavel, Abira and Eigner, Christof and Brecht, Benjamin and Imlau, Mirco and Silberhorn, Christine}, year={2026} }","ama":"Roeder F, Rüsing M, Hehemann T, et al. Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>. 2026;16(8). doi:<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>","mla":"Roeder, Franz, et al. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” <i>Optical Materials Express</i>, vol. 16, no. 8, 2668, Optica Publishing Group, 2026, doi:<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>.","chicago":"Roeder, Franz, Michael Rüsing, Tobias Hehemann, Abira Gnanavel, Christof Eigner, Benjamin Brecht, Mirco Imlau, and Christine Silberhorn. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” <i>Optical Materials Express</i> 16, no. 8 (2026). <a href=\"https://doi.org/10.1364/ome.592892\">https://doi.org/10.1364/ome.592892</a>.","short":"F. Roeder, M. Rüsing, T. Hehemann, A. Gnanavel, C. Eigner, B. Brecht, M. Imlau, C. Silberhorn, Optical Materials Express 16 (2026).","ieee":"F. Roeder <i>et al.</i>, “Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes,” <i>Optical Materials Express</i>, vol. 16, no. 8, Art. no. 2668, 2026, doi: <a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>.","apa":"Roeder, F., Rüsing, M., Hehemann, T., Gnanavel, A., Eigner, C., Brecht, B., Imlau, M., &#38; Silberhorn, C. (2026). Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>, <i>16</i>(8), Article 2668. <a href=\"https://doi.org/10.1364/ome.592892\">https://doi.org/10.1364/ome.592892</a>"},"quality_controlled":"1","oa":"1","status":"public","_id":"66939","funded_apc":"1","publisher":"Optica Publishing Group","user_id":"22501","volume":16,"publication":"Optical Materials Express","issue":"8","abstract":[{"lang":"eng","text":"Many quantum optical applications in spectroscopy, communication and signal analysis rely on spectrally-engineered nonlinear optical interactions to target specific wavelengths or bandwidth. Here, in an established material platform like lithium niobate the achievable wavelength and bandwidth combinations are usually limited by the material’s dispersion and its birefringence. In this regard, mixed crystals of lithium niobate tantalate (LNT) promise a novel material platform, because they allow tuning the birefringence, which is central for type II phase matching devices. Crucially, LNT offers crystal  compositions without any birefringence, which still retain their second-order optical nonlinearity. Despite recent progress in the growth and fabrication of LNT, so far no works have investigated the unique properties of LNT for use in electro-optics, nonlinear or quantum optics. In this study, we explore nonlinear optical devices based on LNT for broad- and narrowband nonlinear optical interactions based on recently measured Sellmeier coefficients. Most interestingly, we find that compositions without birefringence allow the design of broadband, degenerate type II phase matching sources spanning the whole near- to mid-infrared range by only changing the poling period and pump wavelength. Such devices are not easily realizable in pure lithium niobate or lithium tantalate. This could potentially allow for\tmore flexible light sources and nonlinear devices in quantum metrology, quantum spectroscopy and quantum communication."}],"date_created":"2026-09-02T11:53:45Z","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"year":"2026","title":"Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes","author":[{"id":"88149","last_name":"Roeder","first_name":"Franz","full_name":"Roeder, Franz"},{"id":"22501","orcid":"0000-0003-4682-4577","first_name":"Michael","last_name":"Rüsing","full_name":"Rüsing, Michael"},{"full_name":"Hehemann, Tobias","last_name":"Hehemann","first_name":"Tobias"},{"id":"81424","first_name":"Abira","last_name":"Gnanavel","full_name":"Gnanavel, Abira"},{"id":"13244","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Imlau, Mirco","first_name":"Mirco","last_name":"Imlau"},{"last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["2159-3930"]},"publication_status":"published","date_updated":"2026-09-02T13:35:22Z","article_type":"original","intvolume":"        16","article_number":"2668","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1364/OME.592892"}],"language":[{"iso":"eng"}],"doi":"10.1364/ome.592892"},{"article_number":"133105","language":[{"iso":"eng"}],"doi":"10.1063/5.0324002","year":"2026","title":"Photorefraction management in lithium niobate waveguides: High-temperature vs cryogenic solutions","publication_identifier":{"issn":["0021-8979","1089-7550"]},"author":[{"last_name":"Lange","orcid":"0000-0001-6624-7098","first_name":"Nina Amelie","full_name":"Lange, Nina Amelie","id":"56843"},{"full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René","id":"78890"},{"id":"22501","orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael","full_name":"Rüsing, Michael"},{"id":"42777","last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael"},{"full_name":"Protte, Maximilian","last_name":"Protte","first_name":"Maximilian","id":"46170"},{"full_name":"Ricken, Raimund","first_name":"Raimund","last_name":"Ricken"},{"full_name":"Padberg, Laura","first_name":"Laura","last_name":"Padberg","id":"40300"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof"},{"first_name":"Tim","last_name":"Bartley","full_name":"Bartley, Tim"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"publication_status":"published","date_updated":"2026-09-02T12:06:14Z","intvolume":"       139","date_created":"2026-04-07T08:41:07Z","type":"journal_article","issue":"13","publication":"Journal of Applied Physics","abstract":[{"text":"<jats:p>Lithium niobate sees widespread use in nonlinear and quantum optical devices, such as for sum- and difference-frequency generation or spontaneous parametric downconversion. In lithium niobate waveguides, nonlinear optical processes are often limited by the so-called photorefractive effect, which limits the maximum input or output powers and impacts the nonlinear spectral response. Therefore, strategies for the management of photorefractive damage are a key consideration in device design. Usually, the photorefractive damage threshold, i.e., the maximal permissible operating power, can be increased by high-temperature operation of devices. This approach, however, is not applicable in cryogenic environments, which may be required for specialized applications. To better understand the impact of photorefraction in nonlinear optical applications, we study the impact of photorefraction on the phase-matching spectra of two nonlinear-optical sum-frequency generation experiments at (1) high temperatures and (2) cryogenic temperatures. Furthermore, we present an approach to reduce the impact of photorefraction, which is compatible with cryogenic operation. This comprises an auxiliary light source, propagating in the same waveguide, which is used to restore phase-matching spectra impacted by photorefraction, as well as reduce pyroelectric effects. Our work provides an alternative route to photorefraction management applicable to cryogenic environments, as well as in situations with tight energy budgets, such as space applications.</jats:p>","lang":"eng"}],"_id":"65359","publisher":"AIP Publishing","user_id":"22501","volume":139,"status":"public","citation":{"mla":"Lange, Nina Amelie, et al. “Photorefraction Management in Lithium Niobate Waveguides: High-Temperature vs Cryogenic Solutions.” <i>Journal of Applied Physics</i>, vol. 139, no. 13, 133105, AIP Publishing, 2026, doi:<a href=\"https://doi.org/10.1063/5.0324002\">10.1063/5.0324002</a>.","bibtex":"@article{Lange_Pollmann_Rüsing_Stefszky_Protte_Ricken_Padberg_Eigner_Bartley_Silberhorn_2026, title={Photorefraction management in lithium niobate waveguides: High-temperature vs cryogenic solutions}, volume={139}, DOI={<a href=\"https://doi.org/10.1063/5.0324002\">10.1063/5.0324002</a>}, number={13133105}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Lange, Nina Amelie and Pollmann, René and Rüsing, Michael and Stefszky, Michael and Protte, Maximilian and Ricken, Raimund and Padberg, Laura and Eigner, Christof and Bartley, Tim and Silberhorn, Christine}, year={2026} }","ama":"Lange NA, Pollmann R, Rüsing M, et al. Photorefraction management in lithium niobate waveguides: High-temperature vs cryogenic solutions. <i>Journal of Applied Physics</i>. 2026;139(13). doi:<a href=\"https://doi.org/10.1063/5.0324002\">10.1063/5.0324002</a>","ieee":"N. A. Lange <i>et al.</i>, “Photorefraction management in lithium niobate waveguides: High-temperature vs cryogenic solutions,” <i>Journal of Applied Physics</i>, vol. 139, no. 13, Art. no. 133105, 2026, doi: <a href=\"https://doi.org/10.1063/5.0324002\">10.1063/5.0324002</a>.","apa":"Lange, N. A., Pollmann, R., Rüsing, M., Stefszky, M., Protte, M., Ricken, R., Padberg, L., Eigner, C., Bartley, T., &#38; Silberhorn, C. (2026). Photorefraction management in lithium niobate waveguides: High-temperature vs cryogenic solutions. <i>Journal of Applied Physics</i>, <i>139</i>(13), Article 133105. <a href=\"https://doi.org/10.1063/5.0324002\">https://doi.org/10.1063/5.0324002</a>","short":"N.A. Lange, R. Pollmann, M. Rüsing, M. Stefszky, M. Protte, R. Ricken, L. Padberg, C. Eigner, T. Bartley, C. Silberhorn, Journal of Applied Physics 139 (2026).","chicago":"Lange, Nina Amelie, René Pollmann, Michael Rüsing, Michael Stefszky, Maximilian Protte, Raimund Ricken, Laura Padberg, Christof Eigner, Tim Bartley, and Christine Silberhorn. “Photorefraction Management in Lithium Niobate Waveguides: High-Temperature vs Cryogenic Solutions.” <i>Journal of Applied Physics</i> 139, no. 13 (2026). <a href=\"https://doi.org/10.1063/5.0324002\">https://doi.org/10.1063/5.0324002</a>."}},{"related_material":{"link":[{"description":"Supplementary notes to the main article","relation":"supplementary_material","url":"https://static-content.springer.com/esm/art%3A10.1038%2Fs41467-026-74861-9/MediaObjects/41467_2026_74861_MOESM1_ESM.pdf"},{"url":"https://doi.org/10.5281/zenodo.20396394","relation":"supplementary_material","description":"Datasets and code"}]},"abstract":[{"lang":"eng","text":"The two-qubit controlled-not (C-NOT) gate is an essential component for gate-based quantum circuits. In fact, its operation, combined with single qubit rotations allows to realise any quantum circuit. Several strategies have been adopted in order to build quantum gates. Among them, photonics offers the dual advantage of excellent isolation from the environment and ease of manipulation at the single qubit level. Here we adopt a scalable time-multiplexed approach in order to build a fully reconfigurable architecture capable of implementing a post-selected C-NOT gate with a fidelity of (93.8 ± 1.4)%. We then show how our time-multiplexed platform can be employed to combine a C-NOT and a single qubit gate in order to generate the four Bell states."}],"issue":"1","publication":"Nature Communications","type":"journal_article","keyword":["Photonic Quantum Computing","Time-multiplexing","Quantum Information"],"department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"date_created":"2026-07-01T07:47:15Z","publication_status":"published","date_updated":"2026-07-01T08:15:21Z","article_type":"original","intvolume":"        17","year":"2026","title":"Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor","author":[{"first_name":"Federico","last_name":"Pegoraro","full_name":"Pegoraro, Federico","id":"88928"},{"full_name":"Held, Philip","last_name":"Held","first_name":"Philip","id":"68236"},{"full_name":"Lammers, Jonas","first_name":"Jonas","last_name":"Lammers"},{"id":"27150","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"publication_identifier":{"issn":["2041-1723"]},"doi":"10.1038/s41467-026-74861-9","article_number":"5683","main_file_link":[{"url":"https://www.nature.com/articles/s41467-026-74861-9","open_access":"1"}],"language":[{"iso":"eng"}],"citation":{"ieee":"F. Pegoraro, P. Held, J. Lammers, B. Brecht, and C. Silberhorn, “Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor,” <i>Nature Communications</i>, vol. 17, no. 1, Art. no. 5683, 2026, doi: <a href=\"https://doi.org/10.1038/s41467-026-74861-9\">10.1038/s41467-026-74861-9</a>.","apa":"Pegoraro, F., Held, P., Lammers, J., Brecht, B., &#38; Silberhorn, C. (2026). Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor. <i>Nature Communications</i>, <i>17</i>(1), Article 5683. <a href=\"https://doi.org/10.1038/s41467-026-74861-9\">https://doi.org/10.1038/s41467-026-74861-9</a>","chicago":"Pegoraro, Federico, Philip Held, Jonas Lammers, Benjamin Brecht, and Christine Silberhorn. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed Fully Reconfigurable Photonic Processor.” <i>Nature Communications</i> 17, no. 1 (2026). <a href=\"https://doi.org/10.1038/s41467-026-74861-9\">https://doi.org/10.1038/s41467-026-74861-9</a>.","short":"F. Pegoraro, P. Held, J. Lammers, B. Brecht, C. Silberhorn, Nature Communications 17 (2026).","mla":"Pegoraro, Federico, et al. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed Fully Reconfigurable Photonic Processor.” <i>Nature Communications</i>, vol. 17, no. 1, 5683, Springer Science and Business Media LLC, 2026, doi:<a href=\"https://doi.org/10.1038/s41467-026-74861-9\">10.1038/s41467-026-74861-9</a>.","bibtex":"@article{Pegoraro_Held_Lammers_Brecht_Silberhorn_2026, title={Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor}, volume={17}, DOI={<a href=\"https://doi.org/10.1038/s41467-026-74861-9\">10.1038/s41467-026-74861-9</a>}, number={15683}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Pegoraro, Federico and Held, Philip and Lammers, Jonas and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }","ama":"Pegoraro F, Held P, Lammers J, Brecht B, Silberhorn C. Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor. <i>Nature Communications</i>. 2026;17(1). doi:<a href=\"https://doi.org/10.1038/s41467-026-74861-9\">10.1038/s41467-026-74861-9</a>"},"oa":"1","status":"public","user_id":"88928","volume":17,"publisher":"Springer Science and Business Media LLC","_id":"66094"},{"title":"Optisch basierter Digital-Analog-Umsetzer","status":"public","year":"2025","author":[{"id":"38254","first_name":"Stephan","last_name":"Kruse","full_name":"Kruse, Stephan"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"first_name":"Tobias","last_name":"Schwabe","full_name":"Schwabe, Tobias","id":"39217"}],"date_updated":"2025-11-27T07:07:16Z","ipn":"DE102023212604B3","_id":"62639","publication_date":"2025-01-23","user_id":"38254","citation":{"chicago":"Kruse, Stephan, Christine Silberhorn, Benjamin Brecht, and Tobias Schwabe. “Optisch Basierter Digital-Analog-Umsetzer,” 2025.","short":"S. Kruse, C. Silberhorn, B. Brecht, T. Schwabe, (2025).","apa":"Kruse, S., Silberhorn, C., Brecht, B., &#38; Schwabe, T. (2025). <i>Optisch basierter Digital-Analog-Umsetzer</i>.","ieee":"S. Kruse, C. Silberhorn, B. Brecht, and T. Schwabe, “Optisch basierter Digital-Analog-Umsetzer.” 2025.","ama":"Kruse S, Silberhorn C, Brecht B, Schwabe T. Optisch basierter Digital-Analog-Umsetzer. Published online 2025.","bibtex":"@article{Kruse_Silberhorn_Brecht_Schwabe_2025, title={Optisch basierter Digital-Analog-Umsetzer}, author={Kruse, Stephan and Silberhorn, Christine and Brecht, Benjamin and Schwabe, Tobias}, year={2025} }","mla":"Kruse, Stephan, et al. <i>Optisch Basierter Digital-Analog-Umsetzer</i>. 2025."},"ipc":"H03M 1/66","date_created":"2025-11-27T07:00:50Z","type":"patent","department":[{"_id":"58"},{"_id":"623"},{"_id":"288"}]},{"publication_identifier":{"issn":["2643-1564"]},"author":[{"full_name":"Kopylov, Denis A.","first_name":"Denis A.","last_name":"Kopylov"},{"full_name":"Stefszky, Michael","last_name":"Stefszky","first_name":"Michael","id":"42777"},{"orcid":"0000-0001-8864-2072","first_name":"Torsten","last_name":"Meier","full_name":"Meier, Torsten","id":"344"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"},{"id":"60286","first_name":"Polina R.","last_name":"Sharapova","full_name":"Sharapova, Polina R."}],"title":"Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation","year":"2025","intvolume":"         7","publication_status":"published","date_updated":"2025-12-05T09:55:22Z","language":[{"iso":"eng"}],"article_number":"033122","doi":"10.1103/zp72-7qwl","publication":"Physical Review Research","issue":"3","abstract":[{"lang":"eng","text":"<jats:p>In this paper, we theoretically study the spectral and temporal properties of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides. Our theoretical approach is based on the formalism of Gaussian states and the Langevin equation, which is elaborated for weak parametric down-conversion and photon-number-unresolved click detection. Using the example of frequency-degenerate type-II SPDC generated under the pump-idler group-velocity-matching condition, we show how the joint-spectral intensity, mode structure, normalized second-order correlation function, and Hong-Ou-Mandel interference pattern depend on internal losses of the SPDC process. We found that the joint-spectral intensity is almost insensitive to internal losses, while the second-order correlation function shows a strong dependence on them, being different for the signal and idler beams in the presence of internal losses. Based on the sensitivity of the normalized second-order correlation function, we show how its measurement can be used to experimentally determine internal losses.</jats:p>"}],"date_created":"2025-12-05T09:33:36Z","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"288"},{"_id":"230"},{"_id":"623"},{"_id":"429"},{"_id":"35"}],"type":"journal_article","status":"public","_id":"62911","publisher":"American Physical Society (APS)","volume":7,"user_id":"16199","citation":{"bibtex":"@article{Kopylov_Stefszky_Meier_Silberhorn_Sharapova_2025, title={Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/zp72-7qwl\">10.1103/zp72-7qwl</a>}, number={3033122}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Kopylov, Denis A. and Stefszky, Michael and Meier, Torsten and Silberhorn, Christine and Sharapova, Polina R.}, year={2025} }","ama":"Kopylov DA, Stefszky M, Meier T, Silberhorn C, Sharapova PR. Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. <i>Physical Review Research</i>. 2025;7(3). doi:<a href=\"https://doi.org/10.1103/zp72-7qwl\">10.1103/zp72-7qwl</a>","mla":"Kopylov, Denis A., et al. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” <i>Physical Review Research</i>, vol. 7, no. 3, 033122, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/zp72-7qwl\">10.1103/zp72-7qwl</a>.","chicago":"Kopylov, Denis A., Michael Stefszky, Torsten Meier, Christine Silberhorn, and Polina R. Sharapova. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” <i>Physical Review Research</i> 7, no. 3 (2025). <a href=\"https://doi.org/10.1103/zp72-7qwl\">https://doi.org/10.1103/zp72-7qwl</a>.","short":"D.A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, P.R. Sharapova, Physical Review Research 7 (2025).","ieee":"D. A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, and P. R. Sharapova, “Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation,” <i>Physical Review Research</i>, vol. 7, no. 3, Art. no. 033122, 2025, doi: <a href=\"https://doi.org/10.1103/zp72-7qwl\">10.1103/zp72-7qwl</a>.","apa":"Kopylov, D. A., Stefszky, M., Meier, T., Silberhorn, C., &#38; Sharapova, P. R. (2025). Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. <i>Physical Review Research</i>, <i>7</i>(3), Article 033122. <a href=\"https://doi.org/10.1103/zp72-7qwl\">https://doi.org/10.1103/zp72-7qwl</a>"},"project":[{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"}]},{"status":"public","publisher":"Optica Publishing Group","_id":"62269","user_id":"49683","volume":33,"citation":{"ieee":"N. A. Lange <i>et al.</i>, “Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides,” <i>Optics Express</i>, vol. 33, no. 24, Art. no. 50451, 2025, doi: <a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>.","apa":"Lange, N. A., Lengeling, S., Mues, P., Quiring, V., Ridder, W., Eigner, C., Herrmann, H., Silberhorn, C., &#38; Bartley, T. (2025). Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. <i>Optics Express</i>, <i>33</i>(24), Article 50451. <a href=\"https://doi.org/10.1364/oe.578108\">https://doi.org/10.1364/oe.578108</a>","short":"N.A. Lange, S. Lengeling, P. Mues, V. Quiring, W. Ridder, C. Eigner, H. Herrmann, C. Silberhorn, T. Bartley, Optics Express 33 (2025).","chicago":"Lange, Nina Amelie, Sebastian Lengeling, Philipp Mues, Viktor Quiring, Werner Ridder, Christof Eigner, Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” <i>Optics Express</i> 33, no. 24 (2025). <a href=\"https://doi.org/10.1364/oe.578108\">https://doi.org/10.1364/oe.578108</a>.","mla":"Lange, Nina Amelie, et al. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” <i>Optics Express</i>, vol. 33, no. 24, 50451, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>.","bibtex":"@article{Lange_Lengeling_Mues_Quiring_Ridder_Eigner_Herrmann_Silberhorn_Bartley_2025, title={Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>}, number={2450451}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Lange, Nina Amelie and Lengeling, Sebastian and Mues, Philipp and Quiring, Viktor and Ridder, Werner and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}, year={2025} }","ama":"Lange NA, Lengeling S, Mues P, et al. Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. <i>Optics Express</i>. 2025;33(24). doi:<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>"},"project":[{"name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren","_id":"171"}],"oa":"1","title":"Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides","year":"2025","publication_identifier":{"issn":["1094-4087"]},"author":[{"first_name":"Nina Amelie","orcid":"0000-0001-6624-7098","last_name":"Lange","full_name":"Lange, Nina Amelie","id":"56843"},{"id":"44373","full_name":"Lengeling, Sebastian","first_name":"Sebastian","last_name":"Lengeling"},{"id":"49772","full_name":"Mues, Philipp","orcid":"0000-0003-0643-7636","first_name":"Philipp","last_name":"Mues"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"last_name":"Ridder","first_name":"Werner","full_name":"Ridder, Werner","id":"63574"},{"full_name":"Eigner, Christof","last_name":"Eigner","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244"},{"first_name":"Harald","last_name":"Herrmann","full_name":"Herrmann, Harald","id":"216"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim","id":"49683"}],"date_updated":"2025-12-12T12:13:45Z","publication_status":"published","intvolume":"        33","article_type":"original","main_file_link":[{"open_access":"1"}],"article_number":"50451","language":[{"iso":"eng"}],"doi":"10.1364/oe.578108","publication":"Optics Express","issue":"24","abstract":[{"lang":"eng","text":"The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Nevertheless, compatibility with certain quantum light sources and superconducting detectors requires operation under cryogenic conditions. We characterize alterations in phase-matching and mode guiding of a non-degenerate spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm, under cryogenic conditions. Despite the effects of pyroelectricity and photorefraction, the spectral properties match our theoretical model. Nevertheless, these effects cause small but significant variations within and between cooling cycles. These measurements provide a first benchmark against which other nonlinear photonic integration platforms, such as thin-film lithium niobate, can be compared."}],"date_created":"2025-11-20T10:35:35Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}]},{"user_id":"56843","doi":"10.1088/1367-2630/ade46c","main_file_link":[{"open_access":"1"}],"language":[{"iso":"eng"}],"_id":"60466","date_updated":"2025-12-15T09:21:29Z","status":"public","year":"2025","title":"Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes","author":[{"first_name":"Julian","last_name":"Brockmeier","full_name":"Brockmeier, Julian","id":"44807"},{"id":"55629","orcid":"0000-0001-7652-1716","last_name":"Schapeler","first_name":"Timon","full_name":"Schapeler, Timon"},{"id":"56843","full_name":"Lange, Nina Amelie","last_name":"Lange","orcid":"0000-0001-6624-7098","first_name":"Nina Amelie"},{"first_name":"Jan Philipp","last_name":"Höpker","full_name":"Höpker, Jan Philipp","id":"33913"},{"id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"},{"id":"49683","full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim"}],"type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"oa":"1","date_created":"2025-06-30T08:58:37Z","project":[{"name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren","_id":"171"}],"publication":"New Journal of Physics","citation":{"chicago":"Brockmeier, Julian, Timon Schapeler, Nina Amelie Lange, Jan Philipp Höpker, Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Harnessing Temporal Dispersion for Integrated Pump Filtering in Spontaneous Heralded Single-Photon Generation Processes.” <i>New Journal of Physics</i>, 2025. <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">https://doi.org/10.1088/1367-2630/ade46c</a>.","short":"J. Brockmeier, T. Schapeler, N.A. Lange, J.P. Höpker, H. Herrmann, C. Silberhorn, T. Bartley, New Journal of Physics (2025).","apa":"Brockmeier, J., Schapeler, T., Lange, N. A., Höpker, J. P., Herrmann, H., Silberhorn, C., &#38; Bartley, T. (2025). Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes. <i>New Journal of Physics</i>. <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">https://doi.org/10.1088/1367-2630/ade46c</a>","ieee":"J. Brockmeier <i>et al.</i>, “Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes,” <i>New Journal of Physics</i>, 2025, doi: <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>.","ama":"Brockmeier J, Schapeler T, Lange NA, et al. Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes. <i>New Journal of Physics</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>","bibtex":"@article{Brockmeier_Schapeler_Lange_Höpker_Herrmann_Silberhorn_Bartley_2025, title={Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes}, DOI={<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>}, journal={New Journal of Physics}, author={Brockmeier, Julian and Schapeler, Timon and Lange, Nina Amelie and Höpker, Jan Philipp and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}, year={2025} }","mla":"Brockmeier, Julian, et al. “Harnessing Temporal Dispersion for Integrated Pump Filtering in Spontaneous Heralded Single-Photon Generation Processes.” <i>New Journal of Physics</i>, 2025, doi:<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>."}},{"status":"public","volume":193,"user_id":"69553","publisher":"Elsevier BV","_id":"63192","quality_controlled":"1","citation":{"short":"M. Kirsch, C. Kießler, S. Lengeling, M. Stefszky, C. Eigner, H. Herrmann, C. Silberhorn, Optics &#38; Laser Technology 193 (2025).","chicago":"Kirsch, Michelle, Christian Kießler, Sebastian Lengeling, Michael Stefszky, Christof Eigner, Harald Herrmann, and Christine Silberhorn. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” <i>Optics &#38; Laser Technology</i> 193 (2025). <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">https://doi.org/10.1016/j.optlastec.2025.114260</a>.","apa":"Kirsch, M., Kießler, C., Lengeling, S., Stefszky, M., Eigner, C., Herrmann, H., &#38; Silberhorn, C. (2025). Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. <i>Optics &#38; Laser Technology</i>, <i>193</i>, Article 114260. <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">https://doi.org/10.1016/j.optlastec.2025.114260</a>","ieee":"M. Kirsch <i>et al.</i>, “Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides,” <i>Optics &#38; Laser Technology</i>, vol. 193, Art. no. 114260, 2025, doi: <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>.","ama":"Kirsch M, Kießler C, Lengeling S, et al. Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. <i>Optics &#38; Laser Technology</i>. 2025;193. doi:<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>","bibtex":"@article{Kirsch_Kießler_Lengeling_Stefszky_Eigner_Herrmann_Silberhorn_2025, title={Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides}, volume={193}, DOI={<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>}, number={114260}, journal={Optics &#38; Laser Technology}, publisher={Elsevier BV}, author={Kirsch, Michelle and Kießler, Christian and Lengeling, Sebastian and Stefszky, Michael and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine}, year={2025} }","mla":"Kirsch, Michelle, et al. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” <i>Optics &#38; Laser Technology</i>, vol. 193, 114260, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>."},"oa":"1","article_type":"original","intvolume":"       193","publication_status":"published","date_updated":"2025-12-18T08:27:13Z","author":[{"id":"69553","first_name":"Michelle","last_name":"Kirsch","full_name":"Kirsch, Michelle"},{"first_name":"Christian","last_name":"Kießler","full_name":"Kießler, Christian","id":"44252"},{"full_name":"Lengeling, Sebastian","last_name":"Lengeling","first_name":"Sebastian","id":"44373"},{"full_name":"Stefszky, Michael","last_name":"Stefszky","first_name":"Michael","id":"42777"},{"id":"13244","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof"},{"full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald","id":"216"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["0030-3992"]},"year":"2025","title":"Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides","doi":"10.1016/j.optlastec.2025.114260","language":[{"iso":"eng"}],"article_number":"114260","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S0030399225018511?via%3Dihub"}],"abstract":[{"lang":"eng","text":"Lithium niobate (LiNbO3) is a widely used material with several desirable physical properties, such as high second-order nonlinear optical and strong electro-optical effects. Thus LiNbO3 is used for various applications such as electro-optic modulation or nonlinear frequency conversion and mixing. But LiNbO3 also exhibits a strong photorefractive effect, which limits the intensity of the optical fields involved. Various approaches to reduce the photorefractive effect have been investigated, such as increasing the temperature, doping the crystal or using different waveguide designs in LiNbO3. Here, we present an analysis of the approach to increase the photorefractive damage threshold by using different waveguide designs. Contrary to previous claims and investigations, our SHG measurements revealed no significant difference in resistance to photorefractive damage when comparing conventional Ti-doped channel waveguides and Ti-doped diced ridge waveguides in LiNbO3. Furthermore, we have investigated the effect of photorefractive cleaning and curing using a light field at 532 nm. Here, we observe a reduction in the photorefractive effect at room temperature during and after SHG measurements, which is an easy alternative to conventional approaches."}],"publication":"Optics & Laser Technology","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"type":"journal_article","date_created":"2025-12-18T08:17:57Z"},{"doi":"10.1103/v24q-sl6n","language":[{"iso":"eng"}],"article_number":"033152","article_type":"original","intvolume":"         7","publication_status":"published","date_updated":"2025-12-18T16:05:45Z","publication_identifier":{"issn":["2643-1564"]},"author":[{"last_name":"Serino","first_name":"Laura Maria","full_name":"Serino, Laura Maria","id":"88242"},{"full_name":"Chesi, Giovanni","first_name":"Giovanni","last_name":"Chesi"},{"full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","id":"27150"},{"full_name":"Maccone, Lorenzo","first_name":"Lorenzo","last_name":"Maccone"},{"last_name":"Macchiavello","first_name":"Chiara","full_name":"Macchiavello, Chiara"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"year":"2025","title":"Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations","department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article","date_created":"2025-12-18T16:04:45Z","abstract":[{"lang":"eng","text":"<jats:p>Quantum uncertainty relations impose fundamental limits on the joint knowledge that can be acquired from complementary observables: Perfect knowledge of a quantum state in one basis implies maximal indetermination in all other mutually unbiased bases (MUBs). Uncertainty relations derived from joint properties of the MUBs are generally assumed to be uniform, irrespective of the specific observables chosen within a set. In this work, we demonstrate instead that the uncertainty relations can depend on the choice of observables. Through both experimental observation and numerical methods, we show that selecting different sets of three MUBs in a five-dimensional quantum system results in distinct uncertainty bounds, i.e., in varying degrees of complementarity, in terms of both entropy and variance.</jats:p>"}],"issue":"3","publication":"Physical Review Research","volume":7,"user_id":"27150","_id":"63213","publisher":"American Physical Society (APS)","status":"public","citation":{"ama":"Serino LM, Chesi G, Brecht B, Maccone L, Macchiavello C, Silberhorn C. Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations. <i>Physical Review Research</i>. 2025;7(3). doi:<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>","short":"L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review Research 7 (2025).","chicago":"Serino, Laura Maria, Giovanni Chesi, Benjamin Brecht, Lorenzo Maccone, Chiara Macchiavello, and Christine Silberhorn. “Complementarity-Based Complementarity: The Choice of Mutually Unbiased Observables Shapes Quantum Uncertainty Relations.” <i>Physical Review Research</i> 7, no. 3 (2025). <a href=\"https://doi.org/10.1103/v24q-sl6n\">https://doi.org/10.1103/v24q-sl6n</a>.","bibtex":"@article{Serino_Chesi_Brecht_Maccone_Macchiavello_Silberhorn_2025, title={Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>}, number={3033152}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Serino, Laura Maria and Chesi, Giovanni and Brecht, Benjamin and Maccone, Lorenzo and Macchiavello, Chiara and Silberhorn, Christine}, year={2025} }","apa":"Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., &#38; Silberhorn, C. (2025). Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations. <i>Physical Review Research</i>, <i>7</i>(3), Article 033152. <a href=\"https://doi.org/10.1103/v24q-sl6n\">https://doi.org/10.1103/v24q-sl6n</a>","mla":"Serino, Laura Maria, et al. “Complementarity-Based Complementarity: The Choice of Mutually Unbiased Observables Shapes Quantum Uncertainty Relations.” <i>Physical Review Research</i>, vol. 7, no. 3, 033152, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>.","ieee":"L. M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, and C. Silberhorn, “Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations,” <i>Physical Review Research</i>, vol. 7, no. 3, Art. no. 033152, 2025, doi: <a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>."}},{"department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article","date_created":"2025-12-18T16:07:11Z","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>High-dimensional time-frequency encodings have the potential to significantly advance quantum information science; however, practical applications require precise knowledge of the encoded quantum states, which becomes increasingly challenging for larger Hilbert spaces. Self-guided tomography (SGT) has emerged as a practical and scalable technique for this purpose in the spatial domain. Here, we apply SGT to estimate time-frequency states using a multi-output quantum pulse gate. We achieve fidelities of more than 99% for 3- and 5-dimensional states without the need for calibration or post-processing. We demonstrate the robustness of SGT against statistical and environmental noise, highlighting its efficacy in the photon-starved regime typical of quantum information applications.</jats:p>","lang":"eng"}],"issue":"2","publication":"Quantum Science and Technology","doi":"10.1088/2058-9565/adb0ea","language":[{"iso":"eng"}],"article_number":"025024","intvolume":"        10","publication_status":"published","date_updated":"2025-12-18T16:07:35Z","author":[{"id":"88242","full_name":"Serino, Laura Maria","last_name":"Serino","first_name":"Laura Maria"},{"last_name":"Rambach","first_name":"Markus","full_name":"Rambach, Markus"},{"id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"full_name":"Romero, Jacquiline","last_name":"Romero","first_name":"Jacquiline"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2058-9565"]},"title":"Self-guided tomography of time-frequency qudits","year":"2025","citation":{"short":"L.M. Serino, M. Rambach, B. Brecht, J. Romero, C. Silberhorn, Quantum Science and Technology 10 (2025).","chicago":"Serino, Laura Maria, Markus Rambach, Benjamin Brecht, Jacquiline Romero, and Christine Silberhorn. “Self-Guided Tomography of Time-Frequency Qudits.” <i>Quantum Science and Technology</i> 10, no. 2 (2025). <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">https://doi.org/10.1088/2058-9565/adb0ea</a>.","apa":"Serino, L. M., Rambach, M., Brecht, B., Romero, J., &#38; Silberhorn, C. (2025). Self-guided tomography of time-frequency qudits. <i>Quantum Science and Technology</i>, <i>10</i>(2), Article 025024. <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">https://doi.org/10.1088/2058-9565/adb0ea</a>","ieee":"L. M. Serino, M. Rambach, B. Brecht, J. Romero, and C. Silberhorn, “Self-guided tomography of time-frequency qudits,” <i>Quantum Science and Technology</i>, vol. 10, no. 2, Art. no. 025024, 2025, doi: <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>.","ama":"Serino LM, Rambach M, Brecht B, Romero J, Silberhorn C. Self-guided tomography of time-frequency qudits. <i>Quantum Science and Technology</i>. 2025;10(2). doi:<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>","bibtex":"@article{Serino_Rambach_Brecht_Romero_Silberhorn_2025, title={Self-guided tomography of time-frequency qudits}, volume={10}, DOI={<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>}, number={2025024}, journal={Quantum Science and Technology}, publisher={IOP Publishing}, author={Serino, Laura Maria and Rambach, Markus and Brecht, Benjamin and Romero, Jacquiline and Silberhorn, Christine}, year={2025} }","mla":"Serino, Laura Maria, et al. “Self-Guided Tomography of Time-Frequency Qudits.” <i>Quantum Science and Technology</i>, vol. 10, no. 2, 025024, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>."},"volume":10,"user_id":"27150","publisher":"IOP Publishing","_id":"63215","status":"public"}]