---
_id: '65094'
abstract:
- lang: eng
  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>"
article_number: '034031'
author:
- first_name: Franz
  full_name: Roeder, Franz
  id: '88149'
  last_name: Roeder
- first_name: René
  full_name: Pollmann, René
  id: '78890'
  last_name: Pollmann
- first_name: Viktor
  full_name: Quiring, Viktor
  last_name: Quiring
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  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>
  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>
  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}
    }'
  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>.
  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>.'
  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>.
  short: F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn,
    Physical Review Applied 25 (2026).
date_created: 2026-03-23T12:28:33Z
date_updated: 2026-03-25T07:59:04Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1103/cwsx-42c4
intvolume: '        25'
issue: '3'
language:
- iso: eng
publication: Physical Review Applied
publication_identifier:
  issn:
  - 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Toward integrated sensors for optimized optical coherence tomography with undetected
  photons
type: journal_article
user_id: '27150'
volume: 25
year: '2026'
...
---
_id: '65096'
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>"
article_number: '548'
author:
- first_name: Patrick Fabian
  full_name: Folge, Patrick Fabian
  id: '88605'
  last_name: Folge
- first_name: Laura Maria
  full_name: Serino, Laura Maria
  id: '88242'
  last_name: Serino
- first_name: Ladislav
  full_name: Mišta, Ladislav
  last_name: Mišta
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Jaroslav
  full_name: Řeháček, Jaroslav
  last_name: Řeháček
- first_name: Zdeněk
  full_name: Hradil, Zdeněk
  last_name: Hradil
citation:
  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>
  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>
  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}
    }'
  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>.'
  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).
date_created: 2026-03-23T12:30:02Z
date_updated: 2026-03-25T07:59:23Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1364/optica.579459
intvolume: '        13'
issue: '3'
language:
- iso: eng
publication: Optica
publication_identifier:
  issn:
  - 2334-2536
publication_status: published
publisher: Optica Publishing Group
status: public
title: Quantum-limited detection of the arrival time and the carrier frequency of
  time-dependent signals
type: journal_article
user_id: '27150'
volume: 13
year: '2026'
...
---
_id: '63451'
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>
article_number: '016102'
author:
- first_name: Timon
  full_name: Schapeler, Timon
  id: '55629'
  last_name: Schapeler
  orcid: 0000-0001-7652-1716
- first_name: Isabell
  full_name: Mischke, Isabell
  last_name: Mischke
- first_name: Fabian
  full_name: Schlue, Fabian
  id: '63579'
  last_name: Schlue
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  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>
  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>
  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} }'
  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>.
  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>.'
  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>.
  short: T. Schapeler, I. Mischke, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn,
    T. Bartley, APL Quantum 3 (2026).
date_created: 2026-01-05T10:00:58Z
date_updated: 2026-03-25T08:00:27Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1063/5.0304127
intvolume: '         3'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '191'
  name: 'PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform'
- _id: '239'
  name: 'ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors
    in Low-Light Applications'
publication: APL Quantum
publication_identifier:
  issn:
  - 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Practical considerations for assignment of photon numbers with SNSPDs
type: journal_article
user_id: '27150'
volume: 3
year: '2026'
...
---
_id: '65095'
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>"
article_number: '032420'
author:
- first_name: Laura Maria
  full_name: Serino, Laura Maria
  id: '88242'
  last_name: Serino
- first_name: Giovanni
  full_name: Chesi, Giovanni
  last_name: Chesi
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Lorenzo
  full_name: Maccone, Lorenzo
  last_name: Maccone
- first_name: Chiara
  full_name: Macchiavello, Chiara
  last_name: Macchiavello
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  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>
  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>
  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>.
  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>.'
  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>.
  short: L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn,
    Physical Review A 113 (2026).
date_created: 2026-03-23T12:29:23Z
date_updated: 2026-03-25T07:59:36Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1103/f6c4-jtlc
intvolume: '       113'
issue: '3'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
  issn:
  - 2469-9926
  - 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Experimental entropic uncertainty relations in dimensions three to five
type: journal_article
user_id: '27150'
volume: 113
year: '2026'
...
---
_id: '60022'
author:
- first_name: Michael
  full_name: Brauckmann, Michael
  last_name: Brauckmann
- first_name: Emmanuel
  full_name: Narvaez Castaneda, Emmanuel
  last_name: Narvaez Castaneda
- first_name: Dustin
  full_name: Siebert, Dustin
  last_name: Siebert
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
- first_name: Thomas
  full_name: Zentgraf, Thomas
  id: '30525'
  last_name: Zentgraf
  orcid: 0000-0002-8662-1101
citation:
  ama: 'Brauckmann M, Narvaez Castaneda E, Siebert D, Brecht B, Förstner J, Zentgraf
    T. Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators.
    In: <i>Proceedings of The 15th International Conference on Metamaterials, Photonic
    Crystals and Plasmonics</i>. ; 2025.'
  apa: Brauckmann, M., Narvaez Castaneda, E., Siebert, D., Brecht, B., Förstner, J.,
    &#38; Zentgraf, T. (2025). Enhancement Of Light-matter Interaction In Topological
    Waveguides And Resonators. <i>Proceedings of The 15th International Conference
    on Metamaterials, Photonic Crystals and Plasmonics</i>. META 2025 - The 15th International
    Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain.
  bibtex: '@inproceedings{Brauckmann_Narvaez Castaneda_Siebert_Brecht_Förstner_Zentgraf_2025,
    title={Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators},
    booktitle={Proceedings of The 15th International Conference on Metamaterials,
    Photonic Crystals and Plasmonics}, author={Brauckmann, Michael and Narvaez Castaneda,
    Emmanuel and Siebert, Dustin and Brecht, Benjamin and Förstner, Jens and Zentgraf,
    Thomas}, year={2025} }'
  chicago: Brauckmann, Michael, Emmanuel Narvaez Castaneda, Dustin Siebert, Benjamin
    Brecht, Jens Förstner, and Thomas Zentgraf. “Enhancement Of Light-Matter Interaction
    In Topological Waveguides And Resonators.” In <i>Proceedings of The 15th International
    Conference on Metamaterials, Photonic Crystals and Plasmonics</i>, 2025.
  ieee: M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner, and
    T. Zentgraf, “Enhancement Of Light-matter Interaction In Topological Waveguides
    And Resonators,” presented at the META 2025 - The 15th International Conference
    on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain, 2025.
  mla: Brauckmann, Michael, et al. “Enhancement Of Light-Matter Interaction In Topological
    Waveguides And Resonators.” <i>Proceedings of The 15th International Conference
    on Metamaterials, Photonic Crystals and Plasmonics</i>, 2025.
  short: 'M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner,
    T. Zentgraf, in: Proceedings of The 15th International Conference on Metamaterials,
    Photonic Crystals and Plasmonics, 2025.'
conference:
  end_date: 2025-07-25
  location: Malaga, Spain
  name: META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals
    and Plasmonics
  start_date: 2025-07-22
date_created: 2025-05-23T06:10:53Z
date_updated: 2025-05-23T06:11:20Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
language:
- iso: eng
project:
- _id: '53'
  grant_number: '231447078'
  name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
    Konzepten zu funktionellen Strukturen'
- _id: '54'
  name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '164'
  grant_number: '231447078'
  name: 'TRR 142 - A09: TRR 142 - Erzeugung von Drei-Photonen-Zuständen mit On-Chip
    Pumplichtunterdrückung in topologischen Wellenleitern (A09*)'
publication: Proceedings of The 15th International Conference on Metamaterials, Photonic
  Crystals and Plasmonics
status: public
title: Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators
type: conference
user_id: '30525'
year: '2025'
...
---
_id: '60587'
author:
- first_name: Timon
  full_name: Schapeler, Timon
  id: '55629'
  last_name: Schapeler
  orcid: 0000-0001-7652-1716
- first_name: Fabian
  full_name: Schlue, Fabian
  id: '63579'
  last_name: Schlue
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: 'Schapeler T, Schlue F, Stefszky M, Brecht B, Silberhorn C, Bartley T. Optimizing
    photon-number resolution with superconducting nanowire multi-photon detectors.
    In: Itzler MA, McIntosh KA, Bienfang JC, eds. <i>Advanced Photon Counting Techniques
    XIX</i>. SPIE; 2025. doi:<a href="https://doi.org/10.1117/12.3054905">10.1117/12.3054905</a>'
  apa: Schapeler, T., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., &#38;
    Bartley, T. (2025). Optimizing photon-number resolution with superconducting nanowire
    multi-photon detectors. In M. A. Itzler, K. A. McIntosh, &#38; J. C. Bienfang
    (Eds.), <i>Advanced Photon Counting Techniques XIX</i>. SPIE. <a href="https://doi.org/10.1117/12.3054905">https://doi.org/10.1117/12.3054905</a>
  bibtex: '@inproceedings{Schapeler_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2025,
    title={Optimizing photon-number resolution with superconducting nanowire multi-photon
    detectors}, DOI={<a href="https://doi.org/10.1117/12.3054905">10.1117/12.3054905</a>},
    booktitle={Advanced Photon Counting Techniques XIX}, publisher={SPIE}, author={Schapeler,
    Timon and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn,
    Christine and Bartley, Tim}, editor={Itzler, Mark A. and McIntosh, K. Alex and
    Bienfang, Joshua C.}, year={2025} }'
  chicago: Schapeler, Timon, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine
    Silberhorn, and Tim Bartley. “Optimizing Photon-Number Resolution with Superconducting
    Nanowire Multi-Photon Detectors.” In <i>Advanced Photon Counting Techniques XIX</i>,
    edited by Mark A. Itzler, K. Alex McIntosh, and Joshua C. Bienfang. SPIE, 2025.
    <a href="https://doi.org/10.1117/12.3054905">https://doi.org/10.1117/12.3054905</a>.
  ieee: 'T. Schapeler, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, and T. Bartley,
    “Optimizing photon-number resolution with superconducting nanowire multi-photon
    detectors,” in <i>Advanced Photon Counting Techniques XIX</i>, 2025, doi: <a href="https://doi.org/10.1117/12.3054905">10.1117/12.3054905</a>.'
  mla: Schapeler, Timon, et al. “Optimizing Photon-Number Resolution with Superconducting
    Nanowire Multi-Photon Detectors.” <i>Advanced Photon Counting Techniques XIX</i>,
    edited by Mark A. Itzler et al., SPIE, 2025, doi:<a href="https://doi.org/10.1117/12.3054905">10.1117/12.3054905</a>.
  short: 'T. Schapeler, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley,
    in: M.A. Itzler, K.A. McIntosh, J.C. Bienfang (Eds.), Advanced Photon Counting
    Techniques XIX, SPIE, 2025.'
date_created: 2025-07-11T09:18:09Z
date_updated: 2025-07-11T09:22:11Z
department:
- _id: '15'
- _id: '623'
doi: 10.1117/12.3054905
editor:
- first_name: Mark A.
  full_name: Itzler, Mark A.
  last_name: Itzler
- first_name: K. Alex
  full_name: McIntosh, K. Alex
  last_name: McIntosh
- first_name: Joshua C.
  full_name: Bienfang, Joshua C.
  last_name: Bienfang
language:
- iso: eng
project:
- _id: '239'
  call_identifier: ERC
  grant_number: '101042399'
  name: 'QuESADILLA: ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array
    Detectors in Low-Light Applications'
- _id: '191'
  grant_number: 13N16103
  name: 'PhoQuant--QCTest: PhoQuant: Photonische Quantencomputer -  Quantencomputing
    Testplattform'
publication: Advanced Photon Counting Techniques XIX
publication_status: published
publisher: SPIE
status: public
title: Optimizing photon-number resolution with superconducting nanowire multi-photon
  detectors
type: conference
user_id: '55629'
year: '2025'
...
---
_id: '61110'
abstract:
- lang: eng
  text: '<jats:p>By analyzing the physics of multi-photon absorption in superconducting
    nanowire single-photon detectors (SNSPDs), we identify physical components of
    jitter. From this, we formulate a quantitative physical model of the multi-photon
    detector response that combines the local detection mechanism and local fluctuations
    (hotspot formation and intrinsic jitter) with the thermoelectric dynamics of resistive
    domains. Our model provides an excellent description of the arrival-time histogram
    of a commercial SNSPD across several orders of magnitude, both in arrival-time
    probability and across mean photon number. This is achieved with just three fitting
    parameters: the scaling of the mean arrival time of voltage response pulses, as
    well as the Gaussian and exponential jitter components. Our findings have important
    implications for photon-number-resolving detector design, as well as applications
    requiring low jitter, such as light detection and ranging (LIDAR).</jats:p>'
article_number: '086113'
article_type: original
author:
- first_name: Mariia
  full_name: Sidorova, Mariia
  last_name: Sidorova
- first_name: Timon
  full_name: Schapeler, Timon
  id: '55629'
  last_name: Schapeler
  orcid: 0000-0001-7652-1716
- first_name: Alexej D.
  full_name: Semenov, Alexej D.
  last_name: Semenov
- first_name: Fabian
  full_name: Schlue, Fabian
  id: '63579'
  last_name: Schlue
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: Sidorova M, Schapeler T, Semenov AD, et al. Jitter in photon-number-resolved
    detection by superconducting nanowires. <i>APL Photonics</i>. 2025;10(8). doi:<a
    href="https://doi.org/10.1063/5.0273752">10.1063/5.0273752</a>
  apa: Sidorova, M., Schapeler, T., Semenov, A. D., Schlue, F., Stefszky, M., Brecht,
    B., Silberhorn, C., &#38; Bartley, T. (2025). Jitter in photon-number-resolved
    detection by superconducting nanowires. <i>APL Photonics</i>, <i>10</i>(8), Article
    086113. <a href="https://doi.org/10.1063/5.0273752">https://doi.org/10.1063/5.0273752</a>
  bibtex: '@article{Sidorova_Schapeler_Semenov_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2025,
    title={Jitter in photon-number-resolved detection by superconducting nanowires},
    volume={10}, DOI={<a href="https://doi.org/10.1063/5.0273752">10.1063/5.0273752</a>},
    number={8086113}, journal={APL Photonics}, publisher={AIP Publishing}, author={Sidorova,
    Mariia and Schapeler, Timon and Semenov, Alexej D. and Schlue, Fabian and Stefszky,
    Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, year={2025}
    }'
  chicago: Sidorova, Mariia, Timon Schapeler, Alexej D. Semenov, Fabian Schlue, Michael
    Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Jitter in Photon-Number-Resolved
    Detection by Superconducting Nanowires.” <i>APL Photonics</i> 10, no. 8 (2025).
    <a href="https://doi.org/10.1063/5.0273752">https://doi.org/10.1063/5.0273752</a>.
  ieee: 'M. Sidorova <i>et al.</i>, “Jitter in photon-number-resolved detection by
    superconducting nanowires,” <i>APL Photonics</i>, vol. 10, no. 8, Art. no. 086113,
    2025, doi: <a href="https://doi.org/10.1063/5.0273752">10.1063/5.0273752</a>.'
  mla: Sidorova, Mariia, et al. “Jitter in Photon-Number-Resolved Detection by Superconducting
    Nanowires.” <i>APL Photonics</i>, vol. 10, no. 8, 086113, AIP Publishing, 2025,
    doi:<a href="https://doi.org/10.1063/5.0273752">10.1063/5.0273752</a>.
  short: M. Sidorova, T. Schapeler, A.D. Semenov, F. Schlue, M. Stefszky, B. Brecht,
    C. Silberhorn, T. Bartley, APL Photonics 10 (2025).
date_created: 2025-09-01T11:12:19Z
date_updated: 2025-09-02T10:47:08Z
department:
- _id: '623'
- _id: '15'
doi: 10.1063/5.0273752
external_id:
  arxiv:
  - arXiv:2503.17146
intvolume: '        10'
issue: '8'
keyword:
- Jitter
- PNR
- SNSPD
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '191'
  name: 'PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform'
- _id: '239'
  name: 'ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors
    in Low-Light Applications'
publication: APL Photonics
publication_identifier:
  issn:
  - 2378-0967
publication_status: published
publisher: AIP Publishing
status: public
title: Jitter in photon-number-resolved detection by superconducting nanowires
type: journal_article
user_id: '55629'
volume: 10
year: '2025'
...
---
_id: '62639'
author:
- first_name: Stephan
  full_name: Kruse, Stephan
  id: '38254'
  last_name: Kruse
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Tobias
  full_name: Schwabe, Tobias
  id: '39217'
  last_name: Schwabe
citation:
  ama: Kruse S, Silberhorn C, Brecht B, Schwabe T. Optisch basierter Digital-Analog-Umsetzer.
    Published online 2025.
  apa: Kruse, S., Silberhorn, C., Brecht, B., &#38; Schwabe, T. (2025). <i>Optisch
    basierter Digital-Analog-Umsetzer</i>.
  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} }'
  chicago: Kruse, Stephan, Christine Silberhorn, Benjamin Brecht, and Tobias Schwabe.
    “Optisch Basierter Digital-Analog-Umsetzer,” 2025.
  ieee: S. Kruse, C. Silberhorn, B. Brecht, and T. Schwabe, “Optisch basierter Digital-Analog-Umsetzer.”
    2025.
  mla: Kruse, Stephan, et al. <i>Optisch Basierter Digital-Analog-Umsetzer</i>. 2025.
  short: S. Kruse, C. Silberhorn, B. Brecht, T. Schwabe, (2025).
date_created: 2025-11-27T07:00:50Z
date_updated: 2025-11-27T07:07:16Z
department:
- _id: '58'
- _id: '623'
- _id: '288'
ipc: H03M 1/66
ipn: DE102023212604B3
publication_date: 2025-01-23
status: public
title: Optisch basierter Digital-Analog-Umsetzer
type: patent
user_id: '38254'
year: '2025'
...
---
_id: '63213'
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>'
article_number: '033152'
article_type: original
author:
- first_name: Laura Maria
  full_name: Serino, Laura Maria
  id: '88242'
  last_name: Serino
- first_name: Giovanni
  full_name: Chesi, Giovanni
  last_name: Chesi
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Lorenzo
  full_name: Maccone, Lorenzo
  last_name: Maccone
- first_name: Chiara
  full_name: Macchiavello, Chiara
  last_name: Macchiavello
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
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>'
  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>'
  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}
    }'
  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>.'
  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>.'
  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>.'
  short: L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn,
    Physical Review Research 7 (2025).
date_created: 2025-12-18T16:04:45Z
date_updated: 2025-12-18T16:05:45Z
department:
- _id: '15'
- _id: '623'
doi: 10.1103/v24q-sl6n
intvolume: '         7'
issue: '3'
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Complementarity-based complementarity: The choice of mutually unbiased observables
  shapes quantum uncertainty relations'
type: journal_article
user_id: '27150'
volume: 7
year: '2025'
...
---
_id: '63214'
abstract:
- lang: eng
  text: <jats:p>We study a possibility of measuring the time-resolved second-order
    autocorrelation function of one of two beams generated in type-II parametric down-conversion
    by means of temporal magnification of this beam, bringing its correlation time
    from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors.
    We show that such a measurement enables one to infer directly the degree of global
    coherence of that beam, which is linked by a simple relation to the number of
    modes characterizing the entanglement between the two generated beams. We illustrate
    the proposed method by an example of photon pairs generated in a periodically
    poled potassium titanyl phosphate (KTP) crystal with a symmetric group velocity
    matching for various durations of the pump pulse, resulting in different numbers
    of modes. Our theoretical model also shows that the magnified double-heralded
    autocorrelation function of one beam exhibits a local maximum around zero delay
    time, corresponding to photon bunching at a short time scale.</jats:p>
article_number: '023703'
author:
- first_name: Dmitri B.
  full_name: Horoshko, Dmitri B.
  last_name: Horoshko
- first_name: Shivang
  full_name: Srivastava, Shivang
  last_name: Srivastava
- first_name: Filip
  full_name: Sośnicki, Filip
  last_name: Sośnicki
- first_name: Michał
  full_name: Mikołajczyk, Michał
  last_name: Mikołajczyk
- first_name: Michał
  full_name: Karpiński, Michał
  last_name: Karpiński
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Mikhail I.
  full_name: Kolobov, Mikhail I.
  last_name: Kolobov
citation:
  ama: Horoshko DB, Srivastava S, Sośnicki F, et al. Time-resolved second-order autocorrelation
    function of parametric down-conversion. <i>Physical Review A</i>. 2025;112(2).
    doi:<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>
  apa: Horoshko, D. B., Srivastava, S., Sośnicki, F., Mikołajczyk, M., Karpiński,
    M., Brecht, B., &#38; Kolobov, M. I. (2025). Time-resolved second-order autocorrelation
    function of parametric down-conversion. <i>Physical Review A</i>, <i>112</i>(2),
    Article 023703. <a href="https://doi.org/10.1103/7ckm-tm3r">https://doi.org/10.1103/7ckm-tm3r</a>
  bibtex: '@article{Horoshko_Srivastava_Sośnicki_Mikołajczyk_Karpiński_Brecht_Kolobov_2025,
    title={Time-resolved second-order autocorrelation function of parametric down-conversion},
    volume={112}, DOI={<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>},
    number={2023703}, journal={Physical Review A}, publisher={American Physical Society
    (APS)}, author={Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip
    and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin and Kolobov,
    Mikhail I.}, year={2025} }'
  chicago: Horoshko, Dmitri B., Shivang Srivastava, Filip Sośnicki, Michał Mikołajczyk,
    Michał Karpiński, Benjamin Brecht, and Mikhail I. Kolobov. “Time-Resolved Second-Order
    Autocorrelation Function of Parametric down-Conversion.” <i>Physical Review A</i>
    112, no. 2 (2025). <a href="https://doi.org/10.1103/7ckm-tm3r">https://doi.org/10.1103/7ckm-tm3r</a>.
  ieee: 'D. B. Horoshko <i>et al.</i>, “Time-resolved second-order autocorrelation
    function of parametric down-conversion,” <i>Physical Review A</i>, vol. 112, no.
    2, Art. no. 023703, 2025, doi: <a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>.'
  mla: Horoshko, Dmitri B., et al. “Time-Resolved Second-Order Autocorrelation Function
    of Parametric down-Conversion.” <i>Physical Review A</i>, vol. 112, no. 2, 023703,
    American Physical Society (APS), 2025, doi:<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>.
  short: D.B. Horoshko, S. Srivastava, F. Sośnicki, M. Mikołajczyk, M. Karpiński,
    B. Brecht, M.I. Kolobov, Physical Review A 112 (2025).
date_created: 2025-12-18T16:06:13Z
date_updated: 2025-12-18T16:06:34Z
department:
- _id: '15'
- _id: '623'
doi: 10.1103/7ckm-tm3r
intvolume: '       112'
issue: '2'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
  issn:
  - 2469-9926
  - 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Time-resolved second-order autocorrelation function of parametric down-conversion
type: journal_article
user_id: '27150'
volume: 112
year: '2025'
...
---
_id: '63215'
abstract:
- lang: eng
  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>"
article_number: '025024'
author:
- first_name: Laura Maria
  full_name: Serino, Laura Maria
  id: '88242'
  last_name: Serino
- first_name: Markus
  full_name: Rambach, Markus
  last_name: Rambach
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Jacquiline
  full_name: Romero, Jacquiline
  last_name: Romero
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  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>
  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>
  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} }'
  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>.
  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>.'
  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>.
  short: L.M. Serino, M. Rambach, B. Brecht, J. Romero, C. Silberhorn, Quantum Science
    and Technology 10 (2025).
date_created: 2025-12-18T16:07:11Z
date_updated: 2025-12-18T16:07:35Z
department:
- _id: '15'
- _id: '623'
doi: 10.1088/2058-9565/adb0ea
intvolume: '        10'
issue: '2'
language:
- iso: eng
publication: Quantum Science and Technology
publication_identifier:
  issn:
  - 2058-9565
publication_status: published
publisher: IOP Publishing
status: public
title: Self-guided tomography of time-frequency qudits
type: journal_article
user_id: '27150'
volume: 10
year: '2025'
...
---
_id: '63091'
abstract:
- lang: eng
  text: We present the design and characterization of a guided-wave, bright, and highly
    frequency non-degenerate parametric down-conversion (PDC) source in thin-film
    lithium niobate. The source generates photon pairs with wavelengths of 815 nm
    and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths.
    We confirm the high quality of the generated single photons by determining a value
    for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3).
    Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which
    is two orders of magnitude higher than sources based on weakly guiding waveguides.
    The shape of the PDC spectrum and the strong agreement between the effective and
    nominal bandwidth highlight our high fabrication quality of periodically poled
    waveguides. The good agreement between the measured and simulated spectral characteristics
    of our source demonstrates our excellent understanding of the PDC process. Our
    result is a valuable step towards practical and scalable quantum communication
    networks as well as photonic quantum computing.
article_number: '52729'
article_type: original
author:
- first_name: Silia
  full_name: Babel, Silia
  id: '63231'
  last_name: Babel
  orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Laura
  full_name: Bollmers, Laura
  id: '61375'
  last_name: Bollmers
- first_name: Franz
  full_name: Roeder, Franz
  id: '88149'
  last_name: Roeder
- first_name: Werner
  full_name: Ridder, Werner
  id: '63574'
  last_name: Ridder
- first_name: Christian
  full_name: Golla, Christian
  id: '40420'
  last_name: Golla
- first_name: Ronja
  full_name: Köthemann, Ronja
  last_name: Köthemann
- first_name: Bernhard
  full_name: Reineke, Bernhard
  id: '29821'
  last_name: Reineke
- first_name: Harald
  full_name: Herrmann, Harald
  id: '216'
  last_name: Herrmann
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Laura
  full_name: Padberg, Laura
  id: '40300'
  last_name: Padberg
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source
    based on thin-film lithium niobate for bridging visible and telecom wavelengths.
    <i>Optics Express</i>. 2025;33(25). doi:<a href="https://doi.org/10.1364/oe.571605">10.1364/oe.571605</a>
  apa: Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R.,
    Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., &#38; Silberhorn,
    C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium
    niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>, <i>33</i>(25),
    Article 52729. <a href="https://doi.org/10.1364/oe.571605">https://doi.org/10.1364/oe.571605</a>
  bibtex: '@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et
    al._2025, title={Ultrabright, two-color photon pair source based on thin-film
    lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={<a
    href="https://doi.org/10.1364/oe.571605">10.1364/oe.571605</a>}, number={2552729},
    journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel,
    Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian
    and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin
    and Eigner, Christof and et al.}, year={2025} }'
  chicago: Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla,
    Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair
    Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.”
    <i>Optics Express</i> 33, no. 25 (2025). <a href="https://doi.org/10.1364/oe.571605">https://doi.org/10.1364/oe.571605</a>.
  ieee: 'S. Babel <i>et al.</i>, “Ultrabright, two-color photon pair source based
    on thin-film lithium niobate for bridging visible and telecom wavelengths,” <i>Optics
    Express</i>, vol. 33, no. 25, Art. no. 52729, 2025, doi: <a href="https://doi.org/10.1364/oe.571605">10.1364/oe.571605</a>.'
  mla: Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film
    Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i>,
    vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:<a href="https://doi.org/10.1364/oe.571605">10.1364/oe.571605</a>.
  short: S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke,
    H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33
    (2025).
date_created: 2025-12-15T07:20:36Z
date_updated: 2026-01-07T11:28:35Z
department:
- _id: '288'
- _id: '623'
doi: 10.1364/oe.571605
intvolume: '        33'
issue: '25'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729
oa: '1'
publication: Optics Express
publication_identifier:
  issn:
  - 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Ultrabright, two-color photon pair source based on thin-film lithium niobate
  for bridging visible and telecom wavelengths
type: journal_article
user_id: '63231'
volume: 33
year: '2025'
...
---
_id: '63733'
abstract:
- lang: eng
  text: <jats:p>We study a possibility of measuring the time-resolved second-order
    autocorrelation function of one of two beams generated in type-II parametric down-conversion
    by means of temporal magnification of this beam, bringing its correlation time
    from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors.
    We show that such a measurement enables one to infer directly the degree of global
    coherence of that beam, which is linked by a simple relation to the number of
    modes characterizing the entanglement between the two generated beams. We illustrate
    the proposed method by an example of photon pairs generated in a periodically
    poled potassium titanyl phosphate (KTP) crystal with a symmetric group velocity
    matching for various durations of the pump pulse, resulting in different numbers
    of modes. Our theoretical model also shows that the magnified double-heralded
    autocorrelation function of one beam exhibits a local maximum around zero delay
    time, corresponding to photon bunching at a short time scale.</jats:p>
article_number: '023703'
author:
- first_name: Dmitri B.
  full_name: Horoshko, Dmitri B.
  last_name: Horoshko
- first_name: Shivang
  full_name: Srivastava, Shivang
  last_name: Srivastava
- first_name: Filip Maksymilian
  full_name: Sośnicki, Filip Maksymilian
  id: '106751'
  last_name: Sośnicki
  orcid: 0000-0002-2465-4645
- first_name: Michał
  full_name: Mikołajczyk, Michał
  last_name: Mikołajczyk
- first_name: Michał
  full_name: Karpiński, Michał
  last_name: Karpiński
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Mikhail I.
  full_name: Kolobov, Mikhail I.
  last_name: Kolobov
citation:
  ama: Horoshko DB, Srivastava S, Sośnicki FM, et al. Time-resolved second-order autocorrelation
    function of parametric down-conversion. <i>Physical Review A</i>. 2025;112(2).
    doi:<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>
  apa: Horoshko, D. B., Srivastava, S., Sośnicki, F. M., Mikołajczyk, M., Karpiński,
    M., Brecht, B., &#38; Kolobov, M. I. (2025). Time-resolved second-order autocorrelation
    function of parametric down-conversion. <i>Physical Review A</i>, <i>112</i>(2),
    Article 023703. <a href="https://doi.org/10.1103/7ckm-tm3r">https://doi.org/10.1103/7ckm-tm3r</a>
  bibtex: '@article{Horoshko_Srivastava_Sośnicki_Mikołajczyk_Karpiński_Brecht_Kolobov_2025,
    title={Time-resolved second-order autocorrelation function of parametric down-conversion},
    volume={112}, DOI={<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>},
    number={2023703}, journal={Physical Review A}, publisher={American Physical Society
    (APS)}, author={Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip
    Maksymilian and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin
    and Kolobov, Mikhail I.}, year={2025} }'
  chicago: Horoshko, Dmitri B., Shivang Srivastava, Filip Maksymilian Sośnicki, Michał
    Mikołajczyk, Michał Karpiński, Benjamin Brecht, and Mikhail I. Kolobov. “Time-Resolved
    Second-Order Autocorrelation Function of Parametric down-Conversion.” <i>Physical
    Review A</i> 112, no. 2 (2025). <a href="https://doi.org/10.1103/7ckm-tm3r">https://doi.org/10.1103/7ckm-tm3r</a>.
  ieee: 'D. B. Horoshko <i>et al.</i>, “Time-resolved second-order autocorrelation
    function of parametric down-conversion,” <i>Physical Review A</i>, vol. 112, no.
    2, Art. no. 023703, 2025, doi: <a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>.'
  mla: Horoshko, Dmitri B., et al. “Time-Resolved Second-Order Autocorrelation Function
    of Parametric down-Conversion.” <i>Physical Review A</i>, vol. 112, no. 2, 023703,
    American Physical Society (APS), 2025, doi:<a href="https://doi.org/10.1103/7ckm-tm3r">10.1103/7ckm-tm3r</a>.
  short: D.B. Horoshko, S. Srivastava, F.M. Sośnicki, M. Mikołajczyk, M. Karpiński,
    B. Brecht, M.I. Kolobov, Physical Review A 112 (2025).
date_created: 2026-01-26T14:28:22Z
date_updated: 2026-03-25T07:59:53Z
department:
- _id: '623'
- _id: '15'
- _id: '288'
doi: 10.1103/7ckm-tm3r
intvolume: '       112'
issue: '2'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
  issn:
  - 2469-9926
  - 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Time-resolved second-order autocorrelation function of parametric down-conversion
type: journal_article
user_id: '27150'
volume: 112
year: '2025'
...
---
_id: '54544'
abstract:
- lang: eng
  text: The biphoton correlation time, a measure for the conditional uncertainty in
    the temporal arrival of two photons from a photon pair source, is a key performance
    identifier for many quantum spectroscopy applications, with shorter correlation
    times typically yielding better performance. Furthermore, it provides fundamental
    insight into the effects of dispersion on the biphoton state. Here, we show that
    a characteristic dependence of the width of the temporal interferogram can be
    exploited to obtain insights into the amount of second-order dispersion inside
    the interferometer and to retrieve actual and Fourier-limited ultrashort biphoton
    correlation times of around 100 fs. In the presented scheme, we simultaneously
    measure spectral and temporal interferograms at the output of an SU(1,1) interferometer
    based on an integrated broadband parametric down conversion source in a Ti:LiNbO3
    waveguide.
article_number: '020350'
author:
- first_name: Franz
  full_name: Roeder, Franz
  id: '88149'
  last_name: Roeder
- first_name: René
  full_name: Pollmann, René
  id: '78890'
  last_name: Pollmann
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Matteo
  full_name: Santandrea, Matteo
  id: '55095'
  last_name: Santandrea
  orcid: 0000-0001-5718-358X
- first_name: Kai Hong
  full_name: Luo, Kai Hong
  id: '36389'
  last_name: Luo
  orcid: 0000-0003-1008-4976
- first_name: V.
  full_name: Quiring, V.
  last_name: Quiring
- first_name: Raimund
  full_name: Ricken, Raimund
  last_name: Ricken
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: Roeder F, Pollmann R, Stefszky M, et al. Measurement of Ultrashort Biphoton
    Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer.
    <i>PRX Quantum</i>. 2024;5(2). doi:<a href="https://doi.org/10.1103/prxquantum.5.020350">10.1103/prxquantum.5.020350</a>
  apa: Roeder, F., Pollmann, R., Stefszky, M., Santandrea, M., Luo, K. H., Quiring,
    V., Ricken, R., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2024). Measurement
    of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband
    SU(1,1)-Interferometer. <i>PRX Quantum</i>, <i>5</i>(2), Article 020350. <a href="https://doi.org/10.1103/prxquantum.5.020350">https://doi.org/10.1103/prxquantum.5.020350</a>
  bibtex: '@article{Roeder_Pollmann_Stefszky_Santandrea_Luo_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024,
    title={Measurement of Ultrashort Biphoton Correlation Times with an Integrated
    Two-Color Broadband SU(1,1)-Interferometer}, volume={5}, DOI={<a href="https://doi.org/10.1103/prxquantum.5.020350">10.1103/prxquantum.5.020350</a>},
    number={2020350}, journal={PRX Quantum}, publisher={American Physical Society
    (APS)}, author={Roeder, Franz and Pollmann, René and Stefszky, Michael and Santandrea,
    Matteo and Luo, Kai Hong and Quiring, V. and Ricken, Raimund and Eigner, Christof
    and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }'
  chicago: Roeder, Franz, René Pollmann, Michael Stefszky, Matteo Santandrea, Kai
    Hong Luo, V. Quiring, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine
    Silberhorn. “Measurement of Ultrashort Biphoton Correlation Times with an Integrated
    Two-Color Broadband SU(1,1)-Interferometer.” <i>PRX Quantum</i> 5, no. 2 (2024).
    <a href="https://doi.org/10.1103/prxquantum.5.020350">https://doi.org/10.1103/prxquantum.5.020350</a>.
  ieee: 'F. Roeder <i>et al.</i>, “Measurement of Ultrashort Biphoton Correlation
    Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer,” <i>PRX Quantum</i>,
    vol. 5, no. 2, Art. no. 020350, 2024, doi: <a href="https://doi.org/10.1103/prxquantum.5.020350">10.1103/prxquantum.5.020350</a>.'
  mla: Roeder, Franz, et al. “Measurement of Ultrashort Biphoton Correlation Times
    with an Integrated Two-Color Broadband SU(1,1)-Interferometer.” <i>PRX Quantum</i>,
    vol. 5, no. 2, 020350, American Physical Society (APS), 2024, doi:<a href="https://doi.org/10.1103/prxquantum.5.020350">10.1103/prxquantum.5.020350</a>.
  short: F. Roeder, R. Pollmann, M. Stefszky, M. Santandrea, K.H. Luo, V. Quiring,
    R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, PRX Quantum 5 (2024).
date_created: 2024-06-01T12:48:51Z
date_updated: 2024-06-01T13:00:53Z
department:
- _id: '288'
- _id: '623'
doi: 10.1103/prxquantum.5.020350
intvolume: '         5'
issue: '2'
language:
- iso: eng
project:
- _id: '207'
  grant_number: 13N15065
  name: 'MiLiQuant: Miniaturisierte Lichtquellen für den industriellen Einsatz in
    Quantensensoren und Quanten-Imaging-Systemen (MiLiQuant) - Teilvorhaben: Technologie
    und Theorie für MIR Quanten-Imaging Systeme'
- _id: '571'
  grant_number: '101070700'
  name: 'MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing'
- _id: '190'
  name: 'E2TPA: Exploiting Entangled Two-Photon Absorption'
publication: PRX Quantum
publication_identifier:
  issn:
  - 2691-3399
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color
  Broadband SU(1,1)-Interferometer
type: journal_article
user_id: '88149'
volume: 5
year: '2024'
...
---
_id: '54812'
article_number: '240802'
author:
- first_name: Lisa T.
  full_name: Weinbrenner, Lisa T.
  last_name: Weinbrenner
- first_name: Nidhin
  full_name: Prasannan, Nidhin
  id: '71403'
  last_name: Prasannan
- first_name: Kiara
  full_name: Hansenne, Kiara
  last_name: Hansenne
- first_name: Sophia
  full_name: Denker, Sophia
  last_name: Denker
- first_name: Jan
  full_name: Sperling, Jan
  id: '75127'
  last_name: Sperling
  orcid: 0000-0002-5844-3205
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Otfried
  full_name: Gühne, Otfried
  last_name: Gühne
citation:
  ama: 'Weinbrenner LT, Prasannan N, Hansenne K, et al. Certifying the Topology of
    Quantum Networks: Theory and Experiment. <i>Physical Review Letters</i>. 2024;132(24).
    doi:<a href="https://doi.org/10.1103/physrevlett.132.240802">10.1103/physrevlett.132.240802</a>'
  apa: 'Weinbrenner, L. T., Prasannan, N., Hansenne, K., Denker, S., Sperling, J.,
    Brecht, B., Silberhorn, C., &#38; Gühne, O. (2024). Certifying the Topology of
    Quantum Networks: Theory and Experiment. <i>Physical Review Letters</i>, <i>132</i>(24),
    Article 240802. <a href="https://doi.org/10.1103/physrevlett.132.240802">https://doi.org/10.1103/physrevlett.132.240802</a>'
  bibtex: '@article{Weinbrenner_Prasannan_Hansenne_Denker_Sperling_Brecht_Silberhorn_Gühne_2024,
    title={Certifying the Topology of Quantum Networks: Theory and Experiment}, volume={132},
    DOI={<a href="https://doi.org/10.1103/physrevlett.132.240802">10.1103/physrevlett.132.240802</a>},
    number={24240802}, journal={Physical Review Letters}, publisher={American Physical
    Society (APS)}, author={Weinbrenner, Lisa T. and Prasannan, Nidhin and Hansenne,
    Kiara and Denker, Sophia and Sperling, Jan and Brecht, Benjamin and Silberhorn,
    Christine and Gühne, Otfried}, year={2024} }'
  chicago: 'Weinbrenner, Lisa T., Nidhin Prasannan, Kiara Hansenne, Sophia Denker,
    Jan Sperling, Benjamin Brecht, Christine Silberhorn, and Otfried Gühne. “Certifying
    the Topology of Quantum Networks: Theory and Experiment.” <i>Physical Review Letters</i>
    132, no. 24 (2024). <a href="https://doi.org/10.1103/physrevlett.132.240802">https://doi.org/10.1103/physrevlett.132.240802</a>.'
  ieee: 'L. T. Weinbrenner <i>et al.</i>, “Certifying the Topology of Quantum Networks:
    Theory and Experiment,” <i>Physical Review Letters</i>, vol. 132, no. 24, Art.
    no. 240802, 2024, doi: <a href="https://doi.org/10.1103/physrevlett.132.240802">10.1103/physrevlett.132.240802</a>.'
  mla: 'Weinbrenner, Lisa T., et al. “Certifying the Topology of Quantum Networks:
    Theory and Experiment.” <i>Physical Review Letters</i>, vol. 132, no. 24, 240802,
    American Physical Society (APS), 2024, doi:<a href="https://doi.org/10.1103/physrevlett.132.240802">10.1103/physrevlett.132.240802</a>.'
  short: L.T. Weinbrenner, N. Prasannan, K. Hansenne, S. Denker, J. Sperling, B. Brecht,
    C. Silberhorn, O. Gühne, Physical Review Letters 132 (2024).
date_created: 2024-06-19T06:36:54Z
date_updated: 2024-06-19T06:59:45Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1103/physrevlett.132.240802
intvolume: '       132'
issue: '24'
language:
- iso: eng
publication: Physical Review Letters
publication_identifier:
  issn:
  - 0031-9007
  - 1079-7114
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Certifying the Topology of Quantum Networks: Theory and Experiment'
type: journal_article
user_id: '27150'
volume: 132
year: '2024'
...
---
_id: '55174'
abstract:
- lang: eng
  text: "<jats:p>We apply principal component analysis (PCA) to a set of electrical
    output signals from a commercially available superconducting nanowire single-photon
    detector (SNSPD) to investigate their photon-number-resolving capability. We find
    that the rising edge as well as the amplitude of the electrical signal have the
    most dependence on photon number. Accurately measuring the rising edge while simultaneously
    measuring the voltage of the pulse amplitude maximizes the photon-number resolution
    of SNSPDs. Using an optimal basis of principal components, we show unambiguous
    discrimination between one- and two-photon events, as well as partial resolution
    up to five photons. This expands the use case of SNSPDs to photon-counting experiments,
    without the need of detector multiplexing architectures.</jats:p>\r\n          <jats:sec>\r\n
    \           <jats:title/>\r\n            <jats:supplementary-material>\r\n              <jats:permissions>\r\n
    \               <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement>\r\n
    \               <jats:copyright-year>2024</jats:copyright-year>\r\n              </jats:permissions>\r\n
    \           </jats:supplementary-material>\r\n          </jats:sec>"
article_number: '014024'
author:
- first_name: Timon
  full_name: Schapeler, Timon
  id: '55629'
  last_name: Schapeler
  orcid: 0000-0001-7652-1716
- first_name: Niklas
  full_name: Lamberty, Niklas
  last_name: Lamberty
- first_name: Thomas
  full_name: Hummel, Thomas
  id: '83846'
  last_name: Hummel
  orcid: 0000-0001-8627-2119
- first_name: Fabian
  full_name: Schlue, Fabian
  id: '63579'
  last_name: Schlue
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: Schapeler T, Lamberty N, Hummel T, et al. Electrical trace analysis of superconducting
    nanowire photon-number-resolving detectors. <i>Physical Review Applied</i>. 2024;22(1).
    doi:<a href="https://doi.org/10.1103/physrevapplied.22.014024">10.1103/physrevapplied.22.014024</a>
  apa: Schapeler, T., Lamberty, N., Hummel, T., Schlue, F., Stefszky, M., Brecht,
    B., Silberhorn, C., &#38; Bartley, T. (2024). Electrical trace analysis of superconducting
    nanowire photon-number-resolving detectors. <i>Physical Review Applied</i>, <i>22</i>(1),
    Article 014024. <a href="https://doi.org/10.1103/physrevapplied.22.014024">https://doi.org/10.1103/physrevapplied.22.014024</a>
  bibtex: '@article{Schapeler_Lamberty_Hummel_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2024,
    title={Electrical trace analysis of superconducting nanowire photon-number-resolving
    detectors}, volume={22}, DOI={<a href="https://doi.org/10.1103/physrevapplied.22.014024">10.1103/physrevapplied.22.014024</a>},
    number={1014024}, journal={Physical Review Applied}, publisher={American Physical
    Society (APS)}, author={Schapeler, Timon and Lamberty, Niklas and Hummel, Thomas
    and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn,
    Christine and Bartley, Tim}, year={2024} }'
  chicago: Schapeler, Timon, Niklas Lamberty, Thomas Hummel, Fabian Schlue, Michael
    Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Electrical
    Trace Analysis of Superconducting Nanowire Photon-Number-Resolving Detectors.”
    <i>Physical Review Applied</i> 22, no. 1 (2024). <a href="https://doi.org/10.1103/physrevapplied.22.014024">https://doi.org/10.1103/physrevapplied.22.014024</a>.
  ieee: 'T. Schapeler <i>et al.</i>, “Electrical trace analysis of superconducting
    nanowire photon-number-resolving detectors,” <i>Physical Review Applied</i>, vol.
    22, no. 1, Art. no. 014024, 2024, doi: <a href="https://doi.org/10.1103/physrevapplied.22.014024">10.1103/physrevapplied.22.014024</a>.'
  mla: Schapeler, Timon, et al. “Electrical Trace Analysis of Superconducting Nanowire
    Photon-Number-Resolving Detectors.” <i>Physical Review Applied</i>, vol. 22, no.
    1, 014024, American Physical Society (APS), 2024, doi:<a href="https://doi.org/10.1103/physrevapplied.22.014024">10.1103/physrevapplied.22.014024</a>.
  short: T. Schapeler, N. Lamberty, T. Hummel, F. Schlue, M. Stefszky, B. Brecht,
    C. Silberhorn, T. Bartley, Physical Review Applied 22 (2024).
date_created: 2024-07-11T07:23:08Z
date_updated: 2024-07-11T09:36:00Z
department:
- _id: '15'
- _id: '623'
doi: 10.1103/physrevapplied.22.014024
intvolume: '        22'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '239'
  call_identifier: ERC
  grant_number: '101042399'
  name: 'QuESADILLA: ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array
    Detectors in Low-Light Applications'
- _id: '191'
  grant_number: 13N16103
  name: 'PhoQuant--QCTest: PhoQuant: Photonische Quantencomputer -  Quantencomputing
    Testplattform'
publication: Physical Review Applied
publication_identifier:
  issn:
  - 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Electrical trace analysis of superconducting nanowire photon-number-resolving
  detectors
type: journal_article
user_id: '55629'
volume: 22
year: '2024'
...
---
_id: '57089'
author:
- first_name: Stephan
  full_name: Kruse, Stephan
  id: '38254'
  last_name: Kruse
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Laura Maria
  full_name: Serino, Laura Maria
  id: '88242'
  last_name: Serino
citation:
  ama: Kruse S, Brecht B, Silberhorn C, Serino LM. Quantenoptisch-unterstütztes Sende-/Empfangssystem.
    Published online 2024.
  apa: Kruse, S., Brecht, B., Silberhorn, C., &#38; Serino, L. M. (2024). <i>Quantenoptisch-unterstütztes
    Sende-/Empfangssystem</i>.
  bibtex: '@article{Kruse_Brecht_Silberhorn_Serino_2024, title={Quantenoptisch-unterstütztes
    Sende-/Empfangssystem}, author={Kruse, Stephan and Brecht, Benjamin and Silberhorn,
    Christine and Serino, Laura Maria}, year={2024} }'
  chicago: Kruse, Stephan, Benjamin Brecht, Christine Silberhorn, and Laura Maria
    Serino. “Quantenoptisch-Unterstütztes Sende-/Empfangssystem,” 2024.
  ieee: S. Kruse, B. Brecht, C. Silberhorn, and L. M. Serino, “Quantenoptisch-unterstütztes
    Sende-/Empfangssystem.” 2024.
  mla: Kruse, Stephan, et al. <i>Quantenoptisch-Unterstütztes Sende-/Empfangssystem</i>.
    2024.
  short: S. Kruse, B. Brecht, C. Silberhorn, L.M. Serino, (2024).
date_created: 2024-11-14T16:11:10Z
date_updated: 2024-11-15T13:58:41Z
department:
- _id: '623'
- _id: '58'
ipc: G01S 7/481
ipn: 10 2023 203 697.5
publication_date: 2024-10-24
status: public
title: Quantenoptisch-unterstütztes Sende-/Empfangssystem
type: patent
user_id: '38254'
year: '2024'
...
---
_id: '57743'
article_number: '023717'
author:
- first_name: Suchitra
  full_name: Krishnaswamy, Suchitra
  id: '78347'
  last_name: Krishnaswamy
- first_name: Fabian
  full_name: Schlue, Fabian
  id: '63579'
  last_name: Schlue
- first_name: L.
  full_name: Ares, L.
  last_name: Ares
- first_name: V.
  full_name: Dyachuk, V.
  last_name: Dyachuk
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Jan
  full_name: Sperling, Jan
  id: '75127'
  last_name: Sperling
  orcid: 0000-0002-5844-3205
citation:
  ama: Krishnaswamy S, Schlue F, Ares L, et al. Experimental retrieval of photon statistics
    from click detection. <i>Physical Review A</i>. 2024;110(2). doi:<a href="https://doi.org/10.1103/physreva.110.023717">10.1103/physreva.110.023717</a>
  apa: Krishnaswamy, S., Schlue, F., Ares, L., Dyachuk, V., Stefszky, M., Brecht,
    B., Silberhorn, C., &#38; Sperling, J. (2024). Experimental retrieval of photon
    statistics from click detection. <i>Physical Review A</i>, <i>110</i>(2), Article
    023717. <a href="https://doi.org/10.1103/physreva.110.023717">https://doi.org/10.1103/physreva.110.023717</a>
  bibtex: '@article{Krishnaswamy_Schlue_Ares_Dyachuk_Stefszky_Brecht_Silberhorn_Sperling_2024,
    title={Experimental retrieval of photon statistics from click detection}, volume={110},
    DOI={<a href="https://doi.org/10.1103/physreva.110.023717">10.1103/physreva.110.023717</a>},
    number={2023717}, journal={Physical Review A}, publisher={American Physical Society
    (APS)}, author={Krishnaswamy, Suchitra and Schlue, Fabian and Ares, L. and Dyachuk,
    V. and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Sperling,
    Jan}, year={2024} }'
  chicago: Krishnaswamy, Suchitra, Fabian Schlue, L. Ares, V. Dyachuk, Michael Stefszky,
    Benjamin Brecht, Christine Silberhorn, and Jan Sperling. “Experimental Retrieval
    of Photon Statistics from Click Detection.” <i>Physical Review A</i> 110, no.
    2 (2024). <a href="https://doi.org/10.1103/physreva.110.023717">https://doi.org/10.1103/physreva.110.023717</a>.
  ieee: 'S. Krishnaswamy <i>et al.</i>, “Experimental retrieval of photon statistics
    from click detection,” <i>Physical Review A</i>, vol. 110, no. 2, Art. no. 023717,
    2024, doi: <a href="https://doi.org/10.1103/physreva.110.023717">10.1103/physreva.110.023717</a>.'
  mla: Krishnaswamy, Suchitra, et al. “Experimental Retrieval of Photon Statistics
    from Click Detection.” <i>Physical Review A</i>, vol. 110, no. 2, 023717, American
    Physical Society (APS), 2024, doi:<a href="https://doi.org/10.1103/physreva.110.023717">10.1103/physreva.110.023717</a>.
  short: S. Krishnaswamy, F. Schlue, L. Ares, V. Dyachuk, M. Stefszky, B. Brecht,
    C. Silberhorn, J. Sperling, Physical Review A 110 (2024).
date_created: 2024-12-11T15:33:08Z
date_updated: 2024-12-11T15:35:07Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
- _id: '623'
doi: 10.1103/physreva.110.023717
intvolume: '       110'
issue: '2'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
  issn:
  - 2469-9926
  - 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Experimental retrieval of photon statistics from click detection
type: journal_article
user_id: '75127'
volume: 110
year: '2024'
...
---
_id: '57108'
author:
- first_name: Stephan
  full_name: Kruse, Stephan
  id: '38254'
  last_name: Kruse
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: 'Kruse S, Brecht B, Silberhorn C. A Quantum Pulse Gate Enhanced Photonic Radar
    Architecture . In: ; 2024. doi:<a href="https://doi.org/10.5281/zenodo.14934743">10.5281/zenodo.14934743</a>'
  apa: Kruse, S., Brecht, B., &#38; Silberhorn, C. (2024). <i>A Quantum Pulse Gate
    Enhanced Photonic Radar Architecture </i>. <a href="https://doi.org/10.5281/zenodo.14934743">https://doi.org/10.5281/zenodo.14934743</a>
  bibtex: '@inproceedings{Kruse_Brecht_Silberhorn_2024, title={A Quantum Pulse Gate
    Enhanced Photonic Radar Architecture }, DOI={<a href="https://doi.org/10.5281/zenodo.14934743">10.5281/zenodo.14934743</a>},
    author={Kruse, Stephan and Brecht, Benjamin and Silberhorn, Christine}, year={2024}
    }'
  chicago: Kruse, Stephan, Benjamin Brecht, and Christine Silberhorn. “A Quantum Pulse
    Gate Enhanced Photonic Radar Architecture ,” 2024. <a href="https://doi.org/10.5281/zenodo.14934743">https://doi.org/10.5281/zenodo.14934743</a>.
  ieee: 'S. Kruse, B. Brecht, and C. Silberhorn, “A Quantum Pulse Gate Enhanced Photonic
    Radar Architecture ,” 2024, doi: <a href="https://doi.org/10.5281/zenodo.14934743">10.5281/zenodo.14934743</a>.'
  mla: Kruse, Stephan, et al. <i>A Quantum Pulse Gate Enhanced Photonic Radar Architecture
    </i>. 2024, doi:<a href="https://doi.org/10.5281/zenodo.14934743">10.5281/zenodo.14934743</a>.
  short: 'S. Kruse, B. Brecht, C. Silberhorn, in: 2024.'
date_created: 2024-11-15T10:17:09Z
date_updated: 2025-02-27T06:06:49Z
department:
- _id: '58'
doi: 10.5281/zenodo.14934743
language:
- iso: eng
status: public
title: 'A Quantum Pulse Gate Enhanced Photonic Radar Architecture '
type: conference
user_id: '38254'
year: '2024'
...
---
_id: '56267'
author:
- first_name: Laura
  full_name: Serino, Laura
  id: '88242'
  last_name: Serino
- first_name: Werner
  full_name: Ridder, Werner
  id: '63574'
  last_name: Ridder
- first_name: Abhinandan
  full_name: Bhattacharjee, Abhinandan
  id: '95902'
  last_name: Bhattacharjee
- first_name: Jano
  full_name: Gil López, Jano
  id: '51223'
  last_name: Gil López
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: 'Serino L, Ridder W, Bhattacharjee A, Gil López J, Brecht B, Silberhorn C.
    Orchestrating time and color: a programmable source of high-dimensional entanglement.
    <i>Optica Quantum</i>. Published online 2024. doi:<a href="https://doi.org/10.1364/opticaq.532334">10.1364/opticaq.532334</a>'
  apa: 'Serino, L., Ridder, W., Bhattacharjee, A., Gil López, J., Brecht, B., &#38;
    Silberhorn, C. (2024). Orchestrating time and color: a programmable source of
    high-dimensional entanglement. <i>Optica Quantum</i>. <a href="https://doi.org/10.1364/opticaq.532334">https://doi.org/10.1364/opticaq.532334</a>'
  bibtex: '@article{Serino_Ridder_Bhattacharjee_Gil López_Brecht_Silberhorn_2024,
    title={Orchestrating time and color: a programmable source of high-dimensional
    entanglement}, DOI={<a href="https://doi.org/10.1364/opticaq.532334">10.1364/opticaq.532334</a>},
    journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Serino,
    Laura and Ridder, Werner and Bhattacharjee, Abhinandan and Gil López, Jano and
    Brecht, Benjamin and Silberhorn, Christine}, year={2024} }'
  chicago: 'Serino, Laura, Werner Ridder, Abhinandan Bhattacharjee, Jano Gil López,
    Benjamin Brecht, and Christine Silberhorn. “Orchestrating Time and Color: A Programmable
    Source of High-Dimensional Entanglement.” <i>Optica Quantum</i>, 2024. <a href="https://doi.org/10.1364/opticaq.532334">https://doi.org/10.1364/opticaq.532334</a>.'
  ieee: 'L. Serino, W. Ridder, A. Bhattacharjee, J. Gil López, B. Brecht, and C. Silberhorn,
    “Orchestrating time and color: a programmable source of high-dimensional entanglement,”
    <i>Optica Quantum</i>, 2024, doi: <a href="https://doi.org/10.1364/opticaq.532334">10.1364/opticaq.532334</a>.'
  mla: 'Serino, Laura, et al. “Orchestrating Time and Color: A Programmable Source
    of High-Dimensional Entanglement.” <i>Optica Quantum</i>, Optica Publishing Group,
    2024, doi:<a href="https://doi.org/10.1364/opticaq.532334">10.1364/opticaq.532334</a>.'
  short: L. Serino, W. Ridder, A. Bhattacharjee, J. Gil López, B. Brecht, C. Silberhorn,
    Optica Quantum (2024).
date_created: 2024-09-27T11:46:59Z
date_updated: 2025-12-01T08:49:46Z
department:
- _id: '288'
- _id: '623'
- _id: '288'
doi: 10.1364/opticaq.532334
language:
- iso: eng
project:
- _id: '211'
  name: 'QuICHE: Quanteninformation und Quantenkommunikation mit hochdimensionaler
    Informationskodierung (QuICHE)'
publication: Optica Quantum
publication_identifier:
  issn:
  - 2837-6714
publication_status: published
publisher: Optica Publishing Group
status: public
title: 'Orchestrating time and color: a programmable source of high-dimensional entanglement'
type: journal_article
user_id: '63574'
year: '2024'
...
