[{"author":[{"id":"55907","orcid":"0009-0007-5654-5412","last_name":"Scharwald","first_name":"Dennis","full_name":"Scharwald, Dennis"},{"first_name":"Polina","last_name":"Sharapova","full_name":"Sharapova, Polina","id":"60286"}],"publication_identifier":{"issn":["2643-1564"]},"title":"Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers","year":"2026","article_type":"original","intvolume":"         8","publication_status":"published","date_updated":"2026-08-12T14:29:44Z","language":[{"iso":"eng"}],"article_number":"033139","main_file_link":[{"url":"https://journals.aps.org/prresearch/pdf/10.1103/ph64-ts39","open_access":"1"}],"doi":"10.1103/ph64-ts39","issue":"3","publication":"Physical Review Research","abstract":[{"text":"Multimode quantum light has promising applications in many areas of physics, such as quantum communications and quantum computing. However, its multimode nature also makes it challenging to measure its properties. Recently [I. Barakat et al., Optica Quantum 3, 36 (2025)], a technique for the simultaneous measurement of squeezing of multiple broadband modes based on a phase-sensitive amplification approach was experimentally implemented using a setup that effectively corresponds to an SU(1,1) interferometer. Here, we aim to provide a complete theoretical analysis of the modal structure of (generally unbalanced) SU(1,1) interferometers and a detailed theoretical formal derivation of the framework for this technique. Utilizing the joint Schmidt decomposition of the transfer functions, we investigate the shape and phase profiles of the modes of the SU(1,1) interferometer and its components [parametric down-conversion (PDC) sections] for different parametric gain regimes. We discover a complicated interplay between the PDC modes and the modes of the entire interferometer, and analyze it by using their overlap coefficients as a similarity measure. Finally, we develop a rigorous processing method for the aforementioned multimode squeezing measurement technique and discuss necessary approximations to make this method experimentally feasible.","lang":"eng"}],"date_created":"2026-08-05T11:51:21Z","department":[{"_id":"975"},{"_id":"15"},{"_id":"623"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"},{"_id":"34"},{"_id":"502"}],"type":"journal_article","status":"public","publisher":"American Physical Society (APS)","_id":"66665","volume":8,"user_id":"55907","citation":{"chicago":"Scharwald, Dennis, and Polina Sharapova. “Characterization of Spatial Schmidt Modes in High-Gain SU(1,1) Interferometers.” <i>Physical Review Research</i> 8, no. 3 (2026). <a href=\"https://doi.org/10.1103/ph64-ts39\">https://doi.org/10.1103/ph64-ts39</a>.","short":"D. Scharwald, P. Sharapova, Physical Review Research 8 (2026).","apa":"Scharwald, D., &#38; Sharapova, P. (2026). Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers. <i>Physical Review Research</i>, <i>8</i>(3), Article 033139. <a href=\"https://doi.org/10.1103/ph64-ts39\">https://doi.org/10.1103/ph64-ts39</a>","ieee":"D. Scharwald and P. Sharapova, “Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers,” <i>Physical Review Research</i>, vol. 8, no. 3, Art. no. 033139, 2026, doi: <a href=\"https://doi.org/10.1103/ph64-ts39\">10.1103/ph64-ts39</a>.","ama":"Scharwald D, Sharapova P. Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers. <i>Physical Review Research</i>. 2026;8(3). doi:<a href=\"https://doi.org/10.1103/ph64-ts39\">10.1103/ph64-ts39</a>","bibtex":"@article{Scharwald_Sharapova_2026, title={Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers}, volume={8}, DOI={<a href=\"https://doi.org/10.1103/ph64-ts39\">10.1103/ph64-ts39</a>}, number={3033139}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Scharwald, Dennis and Sharapova, Polina}, year={2026} }","mla":"Scharwald, Dennis, and Polina Sharapova. “Characterization of Spatial Schmidt Modes in High-Gain SU(1,1) Interferometers.” <i>Physical Review Research</i>, vol. 8, no. 3, 033139, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/ph64-ts39\">10.1103/ph64-ts39</a>."},"project":[{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"oa":"1"},{"type":"journal_article","department":[{"_id":"286"},{"_id":"15"}],"date_created":"2025-02-03T09:05:02Z","issue":"1","publication":"Scientific Reports","doi":"10.1038/s41598-025-85982-4","article_number":"3815","language":[{"iso":"eng"}],"date_updated":"2025-02-03T09:06:28Z","publication_status":"published","intvolume":"        15","title":"An applied noise model for scintillation-based CCD detectors in transmission electron microscopy","year":"2025","author":[{"first_name":"Christian","last_name":"Zietlow","full_name":"Zietlow, Christian"},{"id":"20797","full_name":"Lindner, Jörg K. N.","first_name":"Jörg K. N.","last_name":"Lindner"}],"publication_identifier":{"issn":["2045-2322"]},"citation":{"apa":"Zietlow, C., &#38; Lindner, J. K. N. (2025). An applied noise model for scintillation-based CCD detectors in transmission electron microscopy. <i>Scientific Reports</i>, <i>15</i>(1), Article 3815. <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">https://doi.org/10.1038/s41598-025-85982-4</a>","mla":"Zietlow, Christian, and Jörg K. N. Lindner. “An Applied Noise Model for Scintillation-Based CCD Detectors in Transmission Electron Microscopy.” <i>Scientific Reports</i>, vol. 15, no. 1, 3815, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>.","ieee":"C. Zietlow and J. K. N. Lindner, “An applied noise model for scintillation-based CCD detectors in transmission electron microscopy,” <i>Scientific Reports</i>, vol. 15, no. 1, Art. no. 3815, 2025, doi: <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>.","chicago":"Zietlow, Christian, and Jörg K. N. Lindner. “An Applied Noise Model for Scintillation-Based CCD Detectors in Transmission Electron Microscopy.” <i>Scientific Reports</i> 15, no. 1 (2025). <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">https://doi.org/10.1038/s41598-025-85982-4</a>.","ama":"Zietlow C, Lindner JKN. An applied noise model for scintillation-based CCD detectors in transmission electron microscopy. <i>Scientific Reports</i>. 2025;15(1). doi:<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>","short":"C. Zietlow, J.K.N. Lindner, Scientific Reports 15 (2025).","bibtex":"@article{Zietlow_Lindner_2025, title={An applied noise model for scintillation-based CCD detectors in transmission electron microscopy}, volume={15}, DOI={<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>}, number={13815}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Zietlow, Christian and Lindner, Jörg K. N.}, year={2025} }"},"user_id":"77496","volume":15,"_id":"58493","publisher":"Springer Science and Business Media LLC","status":"public"},{"citation":{"mla":"Lindner, Jörg K. N., and Christian Zietlow. “An Applied Noise Model for Low-Loss EELS Maps.” <i>Ultramicroscopy</i>, 114101, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">10.1016/j.ultramic.2024.114101</a>.","apa":"Lindner, J. K. N., &#38; Zietlow, C. (2025). An applied noise model for low-loss EELS maps. <i>Ultramicroscopy</i>, Article 114101. <a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">https://doi.org/10.1016/j.ultramic.2024.114101</a>","ieee":"J. K. N. Lindner and C. Zietlow, “An applied noise model for low-loss EELS maps,” <i>Ultramicroscopy</i>, Art. no. 114101, 2025, doi: <a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">10.1016/j.ultramic.2024.114101</a>.","chicago":"Lindner, Jörg K. N., and Christian Zietlow. “An Applied Noise Model for Low-Loss EELS Maps.” <i>Ultramicroscopy</i>, 2025. <a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">https://doi.org/10.1016/j.ultramic.2024.114101</a>.","ama":"Lindner JKN, Zietlow C. An applied noise model for low-loss EELS maps. <i>Ultramicroscopy</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">10.1016/j.ultramic.2024.114101</a>","short":"J.K.N. Lindner, C. Zietlow, Ultramicroscopy (2025).","bibtex":"@article{Lindner_Zietlow_2025, title={An applied noise model for low-loss EELS maps}, DOI={<a href=\"https://doi.org/10.1016/j.ultramic.2024.114101\">10.1016/j.ultramic.2024.114101</a>}, number={114101}, journal={Ultramicroscopy}, publisher={Elsevier BV}, author={Lindner, Jörg K. N. and Zietlow, Christian}, year={2025} }"},"publication":"Ultramicroscopy","date_created":"2025-01-14T09:41:23Z","department":[{"_id":"286"},{"_id":"15"}],"type":"journal_article","publication_identifier":{"issn":["0304-3991"]},"author":[{"id":"20797","full_name":"Lindner, Jörg K. N.","last_name":"Lindner","first_name":"Jörg K. N."},{"last_name":"Zietlow","first_name":"Christian","full_name":"Zietlow, Christian"}],"year":"2025","status":"public","title":"An applied noise model for low-loss EELS maps","publication_status":"published","date_updated":"2025-02-03T08:23:19Z","_id":"58178","publisher":"Elsevier BV","language":[{"iso":"eng"}],"article_number":"114101","user_id":"77496","doi":"10.1016/j.ultramic.2024.114101"},{"status":"public","user_id":"24755","publisher":"IOP Publishing","_id":"59416","quality_controlled":"1","citation":{"ama":"Feser MS, Bauer AB. From belonging to success: Evaluating the influence of sense of belonging to physics on first-year university students’ academic outcomes and the benefits of a holistic support program. <i>European Journal of Physics</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1088/1361-6404/adca13\">10.1088/1361-6404/adca13</a>","bibtex":"@article{Feser_Bauer_2025, title={From belonging to success: Evaluating the influence of sense of belonging to physics on first-year university students’ academic outcomes and the benefits of a holistic support program}, DOI={<a href=\"https://doi.org/10.1088/1361-6404/adca13\">10.1088/1361-6404/adca13</a>}, journal={European Journal of Physics}, publisher={IOP Publishing}, author={Feser, Markus Sebastian and Bauer, Anna Brigitte}, year={2025} }","mla":"Feser, Markus Sebastian, and Anna Brigitte Bauer. “From Belonging to Success: Evaluating the Influence of Sense of Belonging to Physics on First-Year University Students’ Academic Outcomes and the Benefits of a Holistic Support Program.” <i>European Journal of Physics</i>, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6404/adca13\">10.1088/1361-6404/adca13</a>.","chicago":"Feser, Markus Sebastian, and Anna Brigitte Bauer. “From Belonging to Success: Evaluating the Influence of Sense of Belonging to Physics on First-Year University Students’ Academic Outcomes and the Benefits of a Holistic Support Program.” <i>European Journal of Physics</i>, 2025. <a href=\"https://doi.org/10.1088/1361-6404/adca13\">https://doi.org/10.1088/1361-6404/adca13</a>.","short":"M.S. Feser, A.B. Bauer, European Journal of Physics (2025).","apa":"Feser, M. S., &#38; Bauer, A. B. (2025). From belonging to success: Evaluating the influence of sense of belonging to physics on first-year university students’ academic outcomes and the benefits of a holistic support program. <i>European Journal of Physics</i>. <a href=\"https://doi.org/10.1088/1361-6404/adca13\">https://doi.org/10.1088/1361-6404/adca13</a>","ieee":"M. S. Feser and A. B. Bauer, “From belonging to success: Evaluating the influence of sense of belonging to physics on first-year university students’ academic outcomes and the benefits of a holistic support program,” <i>European Journal of Physics</i>, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6404/adca13\">10.1088/1361-6404/adca13</a>."},"oa":"1","article_type":"original","date_updated":"2025-04-08T06:35:04Z","publication_status":"published","author":[{"full_name":"Feser, Markus Sebastian","first_name":"Markus Sebastian","last_name":"Feser"},{"id":"24755","last_name":"Bauer","orcid":"0000-0002-1742-3099","first_name":"Anna Brigitte","full_name":"Bauer, Anna Brigitte"}],"publication_identifier":{"issn":["0143-0807","1361-6404"]},"year":"2025","title":"From belonging to success: Evaluating the influence of sense of belonging to physics on first-year university students’ academic outcomes and the benefits of a holistic support program","doi":"10.1088/1361-6404/adca13","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://iopscience.iop.org/article/10.1088/1361-6404/adca13"}],"abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>The present study explored the role of first-year physics students’ sense of belonging to physics and how it relates to their learning progression in higher education-level physics. Conducted at Paderborn University, this study examined how students’ sense of belonging to physics influences their academic outcomes in an introductory experimental physics course. Additionally, we investigated how physics students’ engagement in the Physiktreff—a holistic support program for first-year physics students to help them cope with academic and social challenges during their studies—impacts the development of their sense of belonging to physics over time. Our findings indicated that students with a stronger sense of belonging to physics performed better academically. Moreover, students who actively participated in the support program experienced a positive shift in their sense of belonging to physics. However, our findings also revealed that physics students with a higher initial sense of belonging to physics tended to experience a decline in their sense of belonging to physics during their first semester. These results underscore the importance of fostering a sense of belonging to physics within higher education, particularly during the introductory phase of students’ studies.&amp;#xD;</jats:p>","lang":"eng"}],"publication":"European Journal of Physics","department":[{"_id":"299"}],"type":"journal_article","date_created":"2025-04-08T06:32:20Z"},{"date_created":"2025-04-16T14:01:48Z","type":"dissertation","department":[{"_id":"299"}],"citation":{"apa":"Zeller, J. (2025). <i>Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning</i>. Universität Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-2238\">https://doi.org/10.17619/UNIPB/1-2238</a>","ieee":"J. Zeller, <i>Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning</i>. Universität Paderborn, 2025.","short":"J. Zeller, Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning, Universität Paderborn, 2025.","chicago":"Zeller, Jannis. <i>Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning</i>. Universität Paderborn, 2025. <a href=\"https://doi.org/10.17619/UNIPB/1-2238\">https://doi.org/10.17619/UNIPB/1-2238</a>.","mla":"Zeller, Jannis. <i>Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning</i>. Universität Paderborn, 2025, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2238\">10.17619/UNIPB/1-2238</a>.","ama":"Zeller J. <i>Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning</i>. Universität Paderborn; 2025. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2238\">10.17619/UNIPB/1-2238</a>","bibtex":"@book{Zeller_2025, title={Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-2238\">10.17619/UNIPB/1-2238</a>}, publisher={Universität Paderborn}, author={Zeller, Jannis}, year={2025} }"},"abstract":[{"lang":"ger","text":"Das Fachdidaktische Wissen (FDW) zählt zu den zentralen Elementen des Professionswissens (angehender) Lehrkräfte und seine Relevanz ist sowohl theoretisch angenommen als auch empirisch belegt. In der fachdidaktischen Forschung liegt daher bereits seit längerem ein Fokus auf der Analyse des FDW, wobei mittlerweile vor allem Auswirkungen auf die Handlungsqualität und auf Lernergebnisse in den Blick genommen werden. Nach wie vor stellt aber auch die empirisch fundierte inhaltliche Beschreibung des FDW sowie der Transfer entwickelter FDW-Testverfahren auf Basis von Testinstrumenten mit offenem Antwortformat in die Ausbildungspraxis ein Forschungsdesiderat dar. In diesem Dissertationsprojekt werden daher auf Basis eines Datensatzes von 846 Bearbeitungen eines FDW-Testinstruments im Fach Physik (1) projektübergreifende FDW-Kompetenzniveaus auf Basis von Item-Response-Modellierungen exploriert, (2) nicht-hierarchische FDW-Kompetenzprofile auf Basis von (probabilistischen) Cluster- und Textanalysen beschrieben und (3) ein vollständig automatisiertes FDW-Assessment-System auf Basis von Machine Learning entwickelt. Dabei wurden insbesondere kognitive Anforderungskategorien als Subskalen des verwendeten Testinstruments betrachtet. Das Assessment-System wurde dabei auf Basis dieser und weiterer Subskalen sowie anhand der Zuordnung von Proband:innen zu den Kompetenzprofilen evaluiert und zeigte sowohl relativ zur Interrater-Übereinstimmung als auch absolut betrachtet hohe Performanzwerte."},{"text":"Pedagogical Content Knowledge (PCK) is one of the central elements of the professional knowledge of (prospective) teachers. Its relevance is theoretically established and empirically shown multiple times. PCK has therefore been analyzed continuously in education research, currently with a particular emphasis on its impact on the quality of teaching and directly on learning outcomes. However, there is still a lack of detailed empirically backed descriptions of the intricacies of PCK and of methodologies for translating developed PCK assessment procedures based on open-ended questionnaires into educational practice. In this dissertation project, therefore, three objectives are pursued, based on a dataset of 846 responses to a physics PCK test instrument. First, cross-project PCK competency levels are explored based on item response modeling. Second, non-hierarchical PCK competency profiles are described based on (probabilistic) cluster and text analyses. Third, a fully automated FDW assessment system based on Machine Learning is developed. In particular, cognitive requirement categories were considered as subscales of the test instrument used. The assessment system was evaluated based on these and other subscales, as well as the assignment of respondents to the competency profiles, and demonstrated high performance values both in relation to inter-rater agreement and in absolute terms.","lang":"eng"}],"_id":"59608","publisher":"Universität Paderborn","language":[{"iso":"ger"},{"iso":"eng"}],"doi":"10.17619/UNIPB/1-2238","user_id":"99022","status":"public","year":"2025","title":"Strukturanalysen des physikdidaktischen Wissens mithilfe von Machine Learning","author":[{"id":"99022","orcid":"0000-0002-1834-5520","last_name":"Zeller","first_name":"Jannis","full_name":"Zeller, Jannis"}],"date_updated":"2025-04-16T14:03:41Z","publication_status":"published"},{"intvolume":"         3","publication_status":"published","date_updated":"2025-05-15T06:54:16Z","author":[{"last_name":"Cramer","first_name":"Katja","full_name":"Cramer, Katja","id":"79855"},{"first_name":"Yvonne","last_name":"Webersen","full_name":"Webersen, Yvonne","id":"9605"}],"year":"2025","title":"\"Heute wissen wir, wie das Universum aussieht!\" ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie","language":[{"iso":"ger"}],"publication":"MNU-Journal","department":[{"_id":"299"}],"type":"journal_article","date_created":"2023-05-25T15:14:40Z","file":[{"file_id":"59898","content_type":"application/pdf","relation":"main_file","date_updated":"2025-05-15T06:54:16Z","file_name":"MNU_journal_03_237-243.pdf","file_size":1936937,"access_level":"open_access","date_created":"2025-05-14T12:13:44Z","creator":"ygramzow"}],"has_accepted_license":"1","status":"public","volume":3,"user_id":"9605","ddc":["530"],"_id":"45291","page":"237-243","citation":{"bibtex":"@article{Cramer_Webersen_2025, title={“Heute wissen wir, wie das Universum aussieht!” ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie}, volume={3}, journal={MNU-Journal}, author={Cramer, Katja and Webersen, Yvonne}, year={2025}, pages={237–243} }","ama":"Cramer K, Webersen Y. “Heute wissen wir, wie das Universum aussieht!” ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie. <i>MNU-Journal</i>. 2025;3:237-243.","mla":"Cramer, Katja, and Yvonne Webersen. “‘Heute wissen wir, wie das Universum aussieht!’ ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie.” <i>MNU-Journal</i>, vol. 3, 2025, pp. 237–43.","short":"K. Cramer, Y. Webersen, MNU-Journal 3 (2025) 237–243.","chicago":"Cramer, Katja, and Yvonne Webersen. “‘Heute wissen wir, wie das Universum aussieht!’ ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie.” <i>MNU-Journal</i> 3 (2025): 237–43.","ieee":"K. Cramer and Y. Webersen, “‘Heute wissen wir, wie das Universum aussieht!’ ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie,” <i>MNU-Journal</i>, vol. 3, pp. 237–243, 2025.","apa":"Cramer, K., &#38; Webersen, Y. (2025). “Heute wissen wir, wie das Universum aussieht!” ...oder? Eine digitale Lernumgebung zur Vorläufigkeit von naturwissenschaftlichem Wissen am Beispiel der Geschichte der Astronomie. <i>MNU-Journal</i>, <i>3</i>, 237–243."},"file_date_updated":"2025-05-15T06:54:16Z","oa":"1"},{"type":"conference","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2025-05-23T06:10:53Z","project":[{"_id":"53","grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"_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","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.","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} }","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.","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.","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.","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."},"user_id":"30525","language":[{"iso":"eng"}],"_id":"60022","date_updated":"2025-05-23T06:11:20Z","status":"public","title":"Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators","year":"2025","author":[{"first_name":"Michael","last_name":"Brauckmann","full_name":"Brauckmann, Michael"},{"first_name":"Emmanuel","last_name":"Narvaez Castaneda","full_name":"Narvaez Castaneda, Emmanuel"},{"last_name":"Siebert","first_name":"Dustin","full_name":"Siebert, Dustin"},{"id":"27150","first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens","full_name":"Förstner, Jens","id":"158"},{"id":"30525","first_name":"Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","full_name":"Zentgraf, Thomas"}],"conference":{"location":"Malaga, Spain","start_date":"2025-07-22","name":"META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics","end_date":"2025-07-25"}},{"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://www.degruyterbrill.com/document/doi/10.1515/nanoph-2024-0550/html"}],"doi":"10.1515/nanoph-2024-0550","publication_identifier":{"issn":["2192-8614"]},"author":[{"full_name":"Kapoor, Sanjay","last_name":"Kapoor","first_name":"Sanjay"},{"first_name":"Aleksander","last_name":"Rodek","full_name":"Rodek, Aleksander"},{"full_name":"Mikołajczyk, Michał","first_name":"Michał","last_name":"Mikołajczyk"},{"last_name":"Szuniewicz","first_name":"Jerzy","full_name":"Szuniewicz, Jerzy"},{"orcid":"0000-0002-2465-4645","last_name":"Sośnicki","first_name":"Filip Maksymilian","full_name":"Sośnicki, Filip Maksymilian","id":"106751"},{"full_name":"Kazimierczuk, Tomasz","first_name":"Tomasz","last_name":"Kazimierczuk"},{"full_name":"Kossacki, Piotr","last_name":"Kossacki","first_name":"Piotr"},{"full_name":"Karpiński, Michał","first_name":"Michał","last_name":"Karpiński"}],"year":"2025","title":"Electro-optic frequency shift of single photons from a quantum dot","intvolume":"        14","article_type":"original","date_updated":"2026-01-26T14:35:42Z","publication_status":"published","date_created":"2026-01-26T14:34:16Z","department":[{"_id":"623"},{"_id":"288"},{"_id":"15"}],"type":"journal_article","publication":"Nanophotonics","issue":"11","abstract":[{"text":"Quantum dots (QDs) are a promising source of single photons mainly due to their on-demand operation. However, their emission wavelength depends on their size and immediate surroundings in the solid-state environment. By applying a serrodyne electro-optic phase modulation, we achieve a spectral shift up to 0.01 nm (3.5 GHz) while preserving the purity and indistinguishability of the photons. This method provides an efficient and scalable approach for tuning the emission wavelength of QDs without relying on nonlinear frequency mixing or probabilistic processes. Our results show that the electro-optic phase modulation enables stable and tunable spectral shifts, making it suitable for applications such as quantum communication, quantum key distribution, and primarily integrating remote quantum dot sources into large-scale quantum networks.","lang":"eng"}],"_id":"63734","publisher":"Walter de Gruyter GmbH","page":"1775-1782","volume":14,"user_id":"106751","status":"public","citation":{"ieee":"S. Kapoor <i>et al.</i>, “Electro-optic frequency shift of single photons from a quantum dot,” <i>Nanophotonics</i>, vol. 14, no. 11, pp. 1775–1782, 2025, doi: <a href=\"https://doi.org/10.1515/nanoph-2024-0550\">10.1515/nanoph-2024-0550</a>.","apa":"Kapoor, S., Rodek, A., Mikołajczyk, M., Szuniewicz, J., Sośnicki, F. M., Kazimierczuk, T., Kossacki, P., &#38; Karpiński, M. (2025). Electro-optic frequency shift of single photons from a quantum dot. <i>Nanophotonics</i>, <i>14</i>(11), 1775–1782. <a href=\"https://doi.org/10.1515/nanoph-2024-0550\">https://doi.org/10.1515/nanoph-2024-0550</a>","short":"S. Kapoor, A. Rodek, M. Mikołajczyk, J. Szuniewicz, F.M. Sośnicki, T. Kazimierczuk, P. Kossacki, M. Karpiński, Nanophotonics 14 (2025) 1775–1782.","chicago":"Kapoor, Sanjay, Aleksander Rodek, Michał Mikołajczyk, Jerzy Szuniewicz, Filip Maksymilian Sośnicki, Tomasz Kazimierczuk, Piotr Kossacki, and Michał Karpiński. “Electro-Optic Frequency Shift of Single Photons from a Quantum Dot.” <i>Nanophotonics</i> 14, no. 11 (2025): 1775–82. <a href=\"https://doi.org/10.1515/nanoph-2024-0550\">https://doi.org/10.1515/nanoph-2024-0550</a>.","mla":"Kapoor, Sanjay, et al. “Electro-Optic Frequency Shift of Single Photons from a Quantum Dot.” <i>Nanophotonics</i>, vol. 14, no. 11, Walter de Gruyter GmbH, 2025, pp. 1775–82, doi:<a href=\"https://doi.org/10.1515/nanoph-2024-0550\">10.1515/nanoph-2024-0550</a>.","bibtex":"@article{Kapoor_Rodek_Mikołajczyk_Szuniewicz_Sośnicki_Kazimierczuk_Kossacki_Karpiński_2025, title={Electro-optic frequency shift of single photons from a quantum dot}, volume={14}, DOI={<a href=\"https://doi.org/10.1515/nanoph-2024-0550\">10.1515/nanoph-2024-0550</a>}, number={11}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Kapoor, Sanjay and Rodek, Aleksander and Mikołajczyk, Michał and Szuniewicz, Jerzy and Sośnicki, Filip Maksymilian and Kazimierczuk, Tomasz and Kossacki, Piotr and Karpiński, Michał}, year={2025}, pages={1775–1782} }","ama":"Kapoor S, Rodek A, Mikołajczyk M, et al. Electro-optic frequency shift of single photons from a quantum dot. <i>Nanophotonics</i>. 2025;14(11):1775-1782. doi:<a href=\"https://doi.org/10.1515/nanoph-2024-0550\">10.1515/nanoph-2024-0550</a>"}},{"doi":"10.1063/5.0270904","main_file_link":[{"url":"https://pubs.aip.org/aip/app/article/10/9/096111/3364187"}],"article_number":"096111","language":[{"iso":"eng"}],"date_updated":"2026-01-26T14:27:42Z","publication_status":"published","intvolume":"        10","article_type":"original","year":"2025","title":"Aberration-optimized electro-optic time lens model using a tunable aperture","publication_identifier":{"issn":["2378-0967"]},"author":[{"first_name":"Sanjay","last_name":"Kapoor","full_name":"Kapoor, Sanjay"},{"id":"106751","first_name":"Filip Maksymilian","orcid":"0000-0002-2465-4645","last_name":"Sośnicki","full_name":"Sośnicki, Filip Maksymilian"},{"first_name":"Michał","last_name":"Karpiński","full_name":"Karpiński, Michał"}],"type":"journal_article","department":[{"_id":"623"},{"_id":"288"},{"_id":"15"}],"date_created":"2026-01-26T14:24:34Z","abstract":[{"lang":"eng","text":"Time lenses have been recognized as crucial components for manipulating ultrafast optical pulses in various applications, from ultrafast spectroscopy to the interfacing of optical quantum systems. A time lens is characterized by its chirp rate, which determines the focusing strength of the time lens, and accurate knowledge of this chirp is critical for precise dispersion compensation and minimizing aberrations. Here, we introduce a tunable time aperture model for sinusoidal time lenses that provides a more accurate estimate of the effective chirp rate without modifying the device. We derive a closed-form expression for the maximum phase error and show how it depends on the time aperture. We experimentally demonstrate a 1.6-fold improvement in spectral bandwidth compression of Gaussian pulses compared to the conventional approach. Our framework offers a practical tool for designing efficient temporal optical systems, benefiting applications in both classical and quantum optics where accurate spectro-temporal shaping is essential."}],"publication":"APL Photonics","issue":"9","user_id":"106751","volume":10,"publisher":"AIP Publishing","_id":"63732","status":"public","citation":{"chicago":"Kapoor, Sanjay, Filip Maksymilian Sośnicki, and Michał Karpiński. “Aberration-Optimized Electro-Optic Time Lens Model Using a Tunable Aperture.” <i>APL Photonics</i> 10, no. 9 (2025). <a href=\"https://doi.org/10.1063/5.0270904\">https://doi.org/10.1063/5.0270904</a>.","short":"S. Kapoor, F.M. Sośnicki, M. Karpiński, APL Photonics 10 (2025).","ieee":"S. Kapoor, F. M. Sośnicki, and M. Karpiński, “Aberration-optimized electro-optic time lens model using a tunable aperture,” <i>APL Photonics</i>, vol. 10, no. 9, Art. no. 096111, 2025, doi: <a href=\"https://doi.org/10.1063/5.0270904\">10.1063/5.0270904</a>.","apa":"Kapoor, S., Sośnicki, F. M., &#38; Karpiński, M. (2025). Aberration-optimized electro-optic time lens model using a tunable aperture. <i>APL Photonics</i>, <i>10</i>(9), Article 096111. <a href=\"https://doi.org/10.1063/5.0270904\">https://doi.org/10.1063/5.0270904</a>","bibtex":"@article{Kapoor_Sośnicki_Karpiński_2025, title={Aberration-optimized electro-optic time lens model using a tunable aperture}, volume={10}, DOI={<a href=\"https://doi.org/10.1063/5.0270904\">10.1063/5.0270904</a>}, number={9096111}, journal={APL Photonics}, publisher={AIP Publishing}, author={Kapoor, Sanjay and Sośnicki, Filip Maksymilian and Karpiński, Michał}, year={2025} }","ama":"Kapoor S, Sośnicki FM, Karpiński M. Aberration-optimized electro-optic time lens model using a tunable aperture. <i>APL Photonics</i>. 2025;10(9). doi:<a href=\"https://doi.org/10.1063/5.0270904\">10.1063/5.0270904</a>","mla":"Kapoor, Sanjay, et al. “Aberration-Optimized Electro-Optic Time Lens Model Using a Tunable Aperture.” <i>APL Photonics</i>, vol. 10, no. 9, 096111, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0270904\">10.1063/5.0270904</a>."}},{"article_number":"016112","main_file_link":[{"open_access":"1","url":"https://pubs.aip.org/aip/app/article-pdf/doi/10.1063/5.0229802/20352749/016112_1_5.0229802.pdf"}],"language":[{"iso":"eng"}],"doi":"10.1063/5.0229802","title":"Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams","year":"2025","publication_identifier":{"issn":["2378-0967"]},"author":[{"id":"55907","full_name":"Scharwald, Dennis","first_name":"Dennis","orcid":"0009-0007-5654-5412","last_name":"Scharwald"},{"last_name":"Gehse","first_name":"Lucas","full_name":"Gehse, Lucas"},{"id":"60286","full_name":"Sharapova, Polina","last_name":"Sharapova","first_name":"Polina"}],"publication_status":"published","date_updated":"2026-02-01T13:19:20Z","article_type":"original","intvolume":"        10","date_created":"2026-01-26T15:48:54Z","type":"journal_article","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"}],"issue":"1","publication":"APL Photonics","abstract":[{"lang":"eng","text":"Orbital angular momentum (OAM) modes are an important resource used in various branches of quantum science and technology due to their unique helical structure and countably infinite basis. Generating light that simultaneously carries high-order orbital angular momenta and exhibits quantum correlations is a challenging task. In this work, we present a theoretical approach to the generation of correlated Schmidt modes carrying OAM via parametric down-conversion (PDC) in cascaded nonlinear systems (nonlinear interferometers) pumped by Laguerre–Gaussian beams. We demonstrate how the number of generated modes and their population can be controlled by varying the pump parameters, the gain of the PDC process, and the distance between the crystals. We investigate the angular displacement measurement uncertainty of these interferometers and demonstrate that it can overcome the classical shot noise limit."}],"_id":"63744","publisher":"AIP Publishing","user_id":"55907","volume":10,"status":"public","oa":"1","citation":{"ama":"Scharwald D, Gehse L, Sharapova P. Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams. <i>APL Photonics</i>. 2025;10(1). doi:<a href=\"https://doi.org/10.1063/5.0229802\">10.1063/5.0229802</a>","bibtex":"@article{Scharwald_Gehse_Sharapova_2025, title={Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams}, volume={10}, DOI={<a href=\"https://doi.org/10.1063/5.0229802\">10.1063/5.0229802</a>}, number={1016112}, journal={APL Photonics}, publisher={AIP Publishing}, author={Scharwald, Dennis and Gehse, Lucas and Sharapova, Polina}, year={2025} }","mla":"Scharwald, Dennis, et al. “Schmidt Modes Carrying Orbital Angular Momentum Generated by Cascaded Systems Pumped with Laguerre–Gaussian Beams.” <i>APL Photonics</i>, vol. 10, no. 1, 016112, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0229802\">10.1063/5.0229802</a>.","chicago":"Scharwald, Dennis, Lucas Gehse, and Polina Sharapova. “Schmidt Modes Carrying Orbital Angular Momentum Generated by Cascaded Systems Pumped with Laguerre–Gaussian Beams.” <i>APL Photonics</i> 10, no. 1 (2025). <a href=\"https://doi.org/10.1063/5.0229802\">https://doi.org/10.1063/5.0229802</a>.","short":"D. Scharwald, L. Gehse, P. Sharapova, APL Photonics 10 (2025).","apa":"Scharwald, D., Gehse, L., &#38; Sharapova, P. (2025). Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams. <i>APL Photonics</i>, <i>10</i>(1), Article 016112. <a href=\"https://doi.org/10.1063/5.0229802\">https://doi.org/10.1063/5.0229802</a>","ieee":"D. Scharwald, L. Gehse, and P. Sharapova, “Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams,” <i>APL Photonics</i>, vol. 10, no. 1, Art. no. 016112, 2025, doi: <a href=\"https://doi.org/10.1063/5.0229802\">10.1063/5.0229802</a>."},"project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}]},{"doi":"10.1038/s41598-025-85982-4","pmid":"1","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1"}],"article_type":"original","intvolume":"        15","publication_status":"published","date_updated":"2026-02-04T07:49:19Z","author":[{"id":"77368","full_name":"Zietlow, Christian","first_name":"Christian","last_name":"Zietlow","orcid":"https://orcid.org/0000-0001-9696-619X"},{"full_name":"Lindner, Jörg","first_name":"Jörg","last_name":"Lindner","id":"20797"}],"publication_identifier":{"issn":["2045-2322"]},"title":"An applied noise model for scintillation-based CCD detectors in transmission electron microscopy.","year":"2025","department":[{"_id":"15"}],"type":"journal_article","date_created":"2025-03-28T07:03:45Z","issue":"1","publication":"Sci Rep","volume":15,"user_id":"77368","_id":"59178","page":"3815","status":"public","oa":"1","external_id":{"pmid":["39885260"]},"quality_controlled":"1","citation":{"short":"C. Zietlow, J. Lindner, Sci Rep 15 (2025) 3815.","chicago":"Zietlow, Christian, and Jörg Lindner. “An Applied Noise Model for Scintillation-Based CCD Detectors in Transmission Electron Microscopy.” <i>Sci Rep</i> 15, no. 1 (2025): 3815. <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">https://doi.org/10.1038/s41598-025-85982-4</a>.","ieee":"C. Zietlow and J. Lindner, “An applied noise model for scintillation-based CCD detectors in transmission electron microscopy.,” <i>Sci Rep</i>, vol. 15, no. 1, p. 3815, 2025, doi: <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>.","apa":"Zietlow, C., &#38; Lindner, J. (2025). An applied noise model for scintillation-based CCD detectors in transmission electron microscopy. <i>Sci Rep</i>, <i>15</i>(1), 3815. <a href=\"https://doi.org/10.1038/s41598-025-85982-4\">https://doi.org/10.1038/s41598-025-85982-4</a>","bibtex":"@article{Zietlow_Lindner_2025, title={An applied noise model for scintillation-based CCD detectors in transmission electron microscopy.}, volume={15}, DOI={<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>}, number={1}, journal={Sci Rep}, author={Zietlow, Christian and Lindner, Jörg}, year={2025}, pages={3815} }","ama":"Zietlow C, Lindner J. An applied noise model for scintillation-based CCD detectors in transmission electron microscopy. <i>Sci Rep</i>. 2025;15(1):3815. doi:<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>","mla":"Zietlow, Christian, and Jörg Lindner. “An Applied Noise Model for Scintillation-Based CCD Detectors in Transmission Electron Microscopy.” <i>Sci Rep</i>, vol. 15, no. 1, 2025, p. 3815, doi:<a href=\"https://doi.org/10.1038/s41598-025-85982-4\">10.1038/s41598-025-85982-4</a>."}},{"status":"public","user_id":"77368","_id":"60001","publisher":"Elsevier","quality_controlled":"1","citation":{"bibtex":"@article{Zietlow_Lindner_2025, title={An unbiased ADMM-TGV algorithm for the deconvolution of STEM-EELS maps}, DOI={<a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">10.1016/j.ultramic.2025.114159</a>}, number={275}, journal={Ultramicroscopy}, publisher={Elsevier}, author={Zietlow, Christian and Lindner, Jörg}, year={2025} }","ama":"Zietlow C, Lindner J. An unbiased ADMM-TGV algorithm for the deconvolution of STEM-EELS maps. <i>Ultramicroscopy</i>. 2025;(275). doi:<a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">10.1016/j.ultramic.2025.114159</a>","mla":"Zietlow, Christian, and Jörg Lindner. “An Unbiased ADMM-TGV Algorithm for the Deconvolution of STEM-EELS Maps.” <i>Ultramicroscopy</i>, no. 275, Elsevier, 2025, doi:<a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">10.1016/j.ultramic.2025.114159</a>.","chicago":"Zietlow, Christian, and Jörg Lindner. “An Unbiased ADMM-TGV Algorithm for the Deconvolution of STEM-EELS Maps.” <i>Ultramicroscopy</i>, no. 275 (2025). <a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">https://doi.org/10.1016/j.ultramic.2025.114159</a>.","short":"C. Zietlow, J. Lindner, Ultramicroscopy (2025).","ieee":"C. Zietlow and J. Lindner, “An unbiased ADMM-TGV algorithm for the deconvolution of STEM-EELS maps,” <i>Ultramicroscopy</i>, no. 275, 2025, doi: <a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">10.1016/j.ultramic.2025.114159</a>.","apa":"Zietlow, C., &#38; Lindner, J. (2025). An unbiased ADMM-TGV algorithm for the deconvolution of STEM-EELS maps. <i>Ultramicroscopy</i>, <i>275</i>. <a href=\"https://doi.org/10.1016/j.ultramic.2025.114159\">https://doi.org/10.1016/j.ultramic.2025.114159</a>"},"oa":"1","external_id":{"pmid":["40398071"]},"article_type":"original","date_updated":"2026-02-04T07:50:40Z","publication_status":"published","author":[{"id":"77368","first_name":"Christian","orcid":"https://orcid.org/0000-0001-9696-619X","last_name":"Zietlow","full_name":"Zietlow, Christian"},{"full_name":"Lindner, Jörg","first_name":"Jörg","last_name":"Lindner","id":"20797"}],"year":"2025","title":"An unbiased ADMM-TGV algorithm for the deconvolution of STEM-EELS maps","doi":"10.1016/j.ultramic.2025.114159","pmid":"1","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1"}],"issue":"275","publication":"Ultramicroscopy","department":[{"_id":"286"},{"_id":"15"}],"type":"journal_article","date_created":"2025-05-20T11:33:24Z"},{"related_material":{"link":[{"url":"https://doi.org/10.17619/UNIPB/1-2438","relation":"software"}]},"abstract":[{"text":"Electron energy-loss spectroscopy (EELS) is an advanced analytical technique in transmission electron microscopy, as it provides insights into material characteristics, such as electronic properties or elemental composition, at the atomic scale. The precision of every EELS analysis, however, is inherently limited by noises and blur. This thesis offers a comprehensive understanding of the noise, which is particularly valuable at low dwell times necessary for beam sensitive materials and for electron-matter interactions with low frequency of occurrence, where the noise dominates the measurement. Additionally, correlations encountered in the noise of an EELS measurement are described from both a theoretical and experimental perspective. These correlations are caused by a convolution of the noisy signal with the detector point spread function. Methods for characterizing key noise parameters of typical detectors are described, allowing the noise model to be tailored to any EELS detector. Ultimately, a novel deconvolution method enabling significant sharpening and denoising of EELS measurements is introduced and demonstrated. Its efficiency is further validated on both simulation and experimental data. The described advancement offered by the proposed deconvolution method enables the extension of current electron microscope capabilities, facilitating analysis that would be unfeasible with existing deconvolution techniques.","lang":"eng"}],"supervisor":[{"id":"20797","last_name":"Lindner","first_name":"Jörg K. N.","full_name":"Lindner, Jörg K. N."}],"citation":{"ieee":"C. Zietlow, <i>A novel Lagrangian-based method for the deconvolution of electron energy-loss spectra</i>. Universitätsbibliothek Paderborn, 2025.","apa":"Zietlow, C. (2025). <i>A novel Lagrangian-based method for the deconvolution of electron energy-loss spectra</i>. Universitätsbibliothek Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-2438\">https://doi.org/10.17619/UNIPB/1-2438</a>","chicago":"Zietlow, Christian. <i>A Novel Lagrangian-Based Method for the Deconvolution of Electron Energy-Loss Spectra</i>. Universitätsbibliothek Paderborn, 2025. <a href=\"https://doi.org/10.17619/UNIPB/1-2438\">https://doi.org/10.17619/UNIPB/1-2438</a>.","short":"C. Zietlow, A Novel Lagrangian-Based Method for the Deconvolution of Electron Energy-Loss Spectra, Universitätsbibliothek Paderborn, 2025.","mla":"Zietlow, Christian. <i>A Novel Lagrangian-Based Method for the Deconvolution of Electron Energy-Loss Spectra</i>. Universitätsbibliothek Paderborn, 2025, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2438\">10.17619/UNIPB/1-2438</a>.","bibtex":"@book{Zietlow_2025, title={A novel Lagrangian-based method for the deconvolution of electron energy-loss spectra}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-2438\">10.17619/UNIPB/1-2438</a>}, publisher={Universitätsbibliothek Paderborn}, author={Zietlow, Christian}, year={2025} }","ama":"Zietlow C. <i>A Novel Lagrangian-Based Method for the Deconvolution of Electron Energy-Loss Spectra</i>. Universitätsbibliothek Paderborn; 2025. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2438\">10.17619/UNIPB/1-2438</a>"},"type":"dissertation","oa":"1","department":[{"_id":"15"}],"date_created":"2026-02-04T06:57:14Z","date_updated":"2026-02-04T12:28:17Z","publication_status":"published","year":"2025","title":"A novel Lagrangian-based method for the deconvolution of electron energy-loss spectra","status":"public","author":[{"id":"77368","full_name":"Zietlow, Christian","orcid":"https://orcid.org/0000-0001-9696-619X","first_name":"Christian","last_name":"Zietlow"}],"doi":"10.17619/UNIPB/1-2438","user_id":"77368","main_file_link":[{"open_access":"1"}],"language":[{"iso":"eng"}],"_id":"63856","publisher":"Universitätsbibliothek Paderborn"},{"oa":"1","citation":{"bibtex":"@article{Barakat_Kalash_Scharwald_Sharapova_Lindlein_Chekhova_2025, title={Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification}, volume={3}, DOI={<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>}, number={136}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Barakat, Ismail and Kalash, Mahmoud and Scharwald, Dennis and Sharapova, Polina and Lindlein, Norbert and Chekhova, Maria}, year={2025} }","ama":"Barakat I, Kalash M, Scharwald D, Sharapova P, Lindlein N, Chekhova M. Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. <i>Optica Quantum</i>. 2025;3(1). doi:<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>","short":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, M. Chekhova, Optica Quantum 3 (2025).","chicago":"Barakat, Ismail, Mahmoud Kalash, Dennis Scharwald, Polina Sharapova, Norbert Lindlein, and Maria Chekhova. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” <i>Optica Quantum</i> 3, no. 1 (2025). <a href=\"https://doi.org/10.1364/opticaq.524682\">https://doi.org/10.1364/opticaq.524682</a>.","ieee":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, and M. Chekhova, “Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification,” <i>Optica Quantum</i>, vol. 3, no. 1, Art. no. 36, 2025, doi: <a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>.","apa":"Barakat, I., Kalash, M., Scharwald, D., Sharapova, P., Lindlein, N., &#38; Chekhova, M. (2025). Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. <i>Optica Quantum</i>, <i>3</i>(1), Article 36. <a href=\"https://doi.org/10.1364/opticaq.524682\">https://doi.org/10.1364/opticaq.524682</a>","mla":"Barakat, Ismail, et al. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” <i>Optica Quantum</i>, vol. 3, no. 1, 36, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/opticaq.524682\">10.1364/opticaq.524682</a>."},"project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"63745","publisher":"Optica Publishing Group","user_id":"55907","volume":3,"status":"public","date_created":"2026-01-26T15:57:13Z","type":"journal_article","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"}],"publication":"Optica Quantum","issue":"1","abstract":[{"lang":"eng","text":"Multimode squeezed light is an increasingly popular tool in photonic quantum technologies, including sensing, imaging, and computation. Meanwhile, the existing methods of its characterization are technically complicated, which reduces the level of squeezing, and mostly deal with a single mode at a time. Here, for the first time, to the best of our knowledge, we employ optical parametric amplification to characterize multiple squeezing eigenmodes simultaneously. We retrieve the shapes and squeezing degrees of all modes at once through direct detection followed by modal decomposition. This method is tolerant to inefficient detection and does not require a local oscillator. For a spectrally and spatially multimode squeezed vacuum, we characterize eight strongest spatial modes, obtaining squeezing and anti-squeezing values of up to −5.2 ± 0.2 dB and 8.6 ± 0.3 dB, respectively, despite the 50% detection loss. This work, being the first exploration of an optical parametric amplifier’s multimode capability for squeezing detection, paves the way for the real-time detection of multimode squeezing."}],"main_file_link":[{"open_access":"1","url":"https://opg.optica.org/opticaq/viewmedia.cfm?uri=opticaq-3-1-36&seq=0"}],"article_number":"36","language":[{"iso":"eng"}],"doi":"10.1364/opticaq.524682","year":"2025","title":"Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification","author":[{"first_name":"Ismail","last_name":"Barakat","full_name":"Barakat, Ismail"},{"full_name":"Kalash, Mahmoud","last_name":"Kalash","first_name":"Mahmoud"},{"id":"55907","full_name":"Scharwald, Dennis","first_name":"Dennis","last_name":"Scharwald","orcid":"0009-0007-5654-5412"},{"full_name":"Sharapova, Polina","first_name":"Polina","last_name":"Sharapova","id":"60286"},{"full_name":"Lindlein, Norbert","first_name":"Norbert","last_name":"Lindlein"},{"first_name":"Maria","last_name":"Chekhova","full_name":"Chekhova, Maria"}],"publication_identifier":{"issn":["2837-6714"]},"date_updated":"2026-02-10T22:44:44Z","publication_status":"published","intvolume":"         3","article_type":"original"},{"_id":"64662","publisher":"Optica Publishing Group","volume":33,"user_id":"20798","status":"public","citation":{"bibtex":"@article{Brinkmann_Meier_Spedt_Meier_2025, title={Boosting third-order nonlinearities in rutile TiO<sub>2</sub> by chromium doping}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.572063\">10.1364/oe.572063</a>}, number={2654320}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Brinkmann, Marius and Meier, Falco and Spedt, Vladimir and Meier, Cedrik}, year={2025} }","ama":"Brinkmann M, Meier F, Spedt V, Meier C. Boosting third-order nonlinearities in rutile TiO<sub>2</sub> by chromium doping. <i>Optics Express</i>. 2025;33(26). doi:<a href=\"https://doi.org/10.1364/oe.572063\">10.1364/oe.572063</a>","mla":"Brinkmann, Marius, et al. “Boosting Third-Order Nonlinearities in Rutile TiO<sub>2</sub> by Chromium Doping.” <i>Optics Express</i>, vol. 33, no. 26, 54320, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.572063\">10.1364/oe.572063</a>.","short":"M. Brinkmann, F. Meier, V. Spedt, C. Meier, Optics Express 33 (2025).","chicago":"Brinkmann, Marius, Falco Meier, Vladimir Spedt, and Cedrik Meier. “Boosting Third-Order Nonlinearities in Rutile TiO<sub>2</sub> by Chromium Doping.” <i>Optics Express</i> 33, no. 26 (2025). <a href=\"https://doi.org/10.1364/oe.572063\">https://doi.org/10.1364/oe.572063</a>.","ieee":"M. Brinkmann, F. Meier, V. Spedt, and C. Meier, “Boosting third-order nonlinearities in rutile TiO<sub>2</sub> by chromium doping,” <i>Optics Express</i>, vol. 33, no. 26, Art. no. 54320, 2025, doi: <a href=\"https://doi.org/10.1364/oe.572063\">10.1364/oe.572063</a>.","apa":"Brinkmann, M., Meier, F., Spedt, V., &#38; Meier, C. (2025). Boosting third-order nonlinearities in rutile TiO<sub>2</sub> by chromium doping. <i>Optics Express</i>, <i>33</i>(26), Article 54320. <a href=\"https://doi.org/10.1364/oe.572063\">https://doi.org/10.1364/oe.572063</a>"},"language":[{"iso":"eng"}],"article_number":"54320","doi":"10.1364/oe.572063","publication_identifier":{"issn":["1094-4087"]},"author":[{"last_name":"Brinkmann","first_name":"Marius","full_name":"Brinkmann, Marius"},{"first_name":"Falco","last_name":"Meier","full_name":"Meier, Falco"},{"full_name":"Spedt, Vladimir","last_name":"Spedt","first_name":"Vladimir"},{"full_name":"Meier, Cedrik","first_name":"Cedrik","orcid":"https://orcid.org/0000-0002-3787-3572","last_name":"Meier","id":"20798"}],"title":"Boosting third-order nonlinearities in rutile TiO<sub>2</sub> by chromium doping","year":"2025","intvolume":"        33","publication_status":"published","date_updated":"2026-02-26T09:44:49Z","date_created":"2026-02-26T09:43:53Z","department":[{"_id":"15"}],"type":"journal_article","issue":"26","publication":"Optics Express","abstract":[{"text":"<jats:p>\r\n                    In this study, we investigate the impact of chromium-induced point defects on the nonlinear optical properties and electric-field-induced second harmonic generation (EFISH) in rutile titanium dioxide (TiO\r\n                    <jats:sub>2</jats:sub>\r\n                    ). Chromium thin films were deposited by electron beam evaporation on (001)-oriented bulk TiO\r\n                    <jats:sub>2</jats:sub>\r\n                    substrates and subsequently diffused into the lattice in a tube furnace under a nitrogen atmosphere at 900 °C. The introduction of chromium significantly enhanced the third harmonic generation (THG) of a 1560 nm laser, with an amplification factor of up to 8.3, indicative of an enhanced third-order nonlinear susceptibility,\r\n                    <jats:italic>χ</jats:italic>\r\n                    <jats:sup>(3)</jats:sup>\r\n                    . Moreover, the application of an external voltage induced a pronounced EFISH signal in the chromium-doped samples, further confirming the enhanced nonlinear response. These results demonstrate that defect engineering via chromium doping in rutile TiO\r\n                    <jats:sub>2</jats:sub>\r\n                    offers a promising pathway for the development of high-performance nonlinear optical devices.\r\n                  </jats:p>","lang":"eng"}]},{"abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Given the presence of fake news and pseudoscience (often disguised as physics), the importance of inoculating citizens against this type of misinformation has gained increasing attention in education. This is a goal that all subjects should pursue equally from their respective disciplinary perspectives. &amp;#xD;The paper presents a teaching approach to protect physics students from misinformation and pseudoscience by combining these three common strategies: First, understanding the fundamental principles of the Nature of Science. Second, identifying techniques of Science Denial. And third, applying heuristics for evaluating (supposedly) scientific information. Finally, the paper offers practical suggestions for applying these strategies in a master's-level physics course, using examples from the field of physics.</jats:p>","lang":"eng"}],"citation":{"mla":"Webersen, Yvonne, and Josef Riese. “Protecting Physics Students from Pseudoscience - Combining Strategies for a Comprehensive Teaching Approach.” <i>European Journal of Physics</i>, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">10.1088/1361-6404/ae03f6</a>.","bibtex":"@article{Webersen_Riese_2025, title={Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach}, DOI={<a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">10.1088/1361-6404/ae03f6</a>}, journal={European Journal of Physics}, publisher={IOP Publishing}, author={Webersen, Yvonne and Riese, Josef}, year={2025} }","ama":"Webersen Y, Riese J. Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach. <i>European Journal of Physics</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">10.1088/1361-6404/ae03f6</a>","ieee":"Y. Webersen and J. Riese, “Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach,” <i>European Journal of Physics</i>, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">10.1088/1361-6404/ae03f6</a>.","apa":"Webersen, Y., &#38; Riese, J. (2025). Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach. <i>European Journal of Physics</i>. <a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">https://doi.org/10.1088/1361-6404/ae03f6</a>","chicago":"Webersen, Yvonne, and Josef Riese. “Protecting Physics Students from Pseudoscience - Combining Strategies for a Comprehensive Teaching Approach.” <i>European Journal of Physics</i>, 2025. <a href=\"https://doi.org/10.1088/1361-6404/ae03f6\">https://doi.org/10.1088/1361-6404/ae03f6</a>.","short":"Y. Webersen, J. Riese, European Journal of Physics (2025)."},"publication":"European Journal of Physics","department":[{"_id":"299"}],"type":"journal_article","date_created":"2025-09-12T08:17:46Z","date_updated":"2025-09-12T08:21:26Z","publication_status":"published","author":[{"id":"9605","first_name":"Yvonne","last_name":"Webersen","full_name":"Webersen, Yvonne"},{"last_name":"Riese","orcid":"0000-0003-2927-2619","first_name":"Josef","full_name":"Riese, Josef","id":"429"}],"publication_identifier":{"issn":["0143-0807","1361-6404"]},"title":"Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach","status":"public","year":"2025","doi":"10.1088/1361-6404/ae03f6","user_id":"9605","publisher":"IOP Publishing","_id":"61241","language":[{"iso":"eng"}]},{"user_id":"16199","volume":111,"_id":"61245","publisher":"American Physical Society (APS)","status":"public","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - Project Area A"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit Polaritonen in Mikrokavitäten","_id":"61"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"citation":{"ama":"Barkhausen F, Ares Santos L, Schumacher S, Sperling J. Entanglement between dependent degrees of freedom: Quasiparticle correlations. <i>Physical Review A</i>. 2025;111(3). doi:<a href=\"https://doi.org/10.1103/physreva.111.032404\">10.1103/physreva.111.032404</a>","bibtex":"@article{Barkhausen_Ares Santos_Schumacher_Sperling_2025, title={Entanglement between dependent degrees of freedom: Quasiparticle correlations}, volume={111}, DOI={<a href=\"https://doi.org/10.1103/physreva.111.032404\">10.1103/physreva.111.032404</a>}, number={3032404}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan and Sperling, Jan}, year={2025} }","mla":"Barkhausen, Franziska, et al. “Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.” <i>Physical Review A</i>, vol. 111, no. 3, 032404, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/physreva.111.032404\">10.1103/physreva.111.032404</a>.","short":"F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review A 111 (2025).","chicago":"Barkhausen, Franziska, Laura Ares Santos, Stefan Schumacher, and Jan Sperling. “Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.” <i>Physical Review A</i> 111, no. 3 (2025). <a href=\"https://doi.org/10.1103/physreva.111.032404\">https://doi.org/10.1103/physreva.111.032404</a>.","apa":"Barkhausen, F., Ares Santos, L., Schumacher, S., &#38; Sperling, J. (2025). Entanglement between dependent degrees of freedom: Quasiparticle correlations. <i>Physical Review A</i>, <i>111</i>(3), Article 032404. <a href=\"https://doi.org/10.1103/physreva.111.032404\">https://doi.org/10.1103/physreva.111.032404</a>","ieee":"F. Barkhausen, L. Ares Santos, S. Schumacher, and J. Sperling, “Entanglement between dependent degrees of freedom: Quasiparticle correlations,” <i>Physical Review A</i>, vol. 111, no. 3, Art. no. 032404, 2025, doi: <a href=\"https://doi.org/10.1103/physreva.111.032404\">10.1103/physreva.111.032404</a>."},"doi":"10.1103/physreva.111.032404","article_number":"032404","language":[{"iso":"eng"}],"date_updated":"2025-09-12T10:42:16Z","publication_status":"published","intvolume":"       111","year":"2025","title":"Entanglement between dependent degrees of freedom: Quasiparticle correlations","publication_identifier":{"issn":["2469-9926","2469-9934"]},"author":[{"full_name":"Barkhausen, Franziska","first_name":"Franziska","last_name":"Barkhausen","id":"63631"},{"full_name":"Ares Santos, Laura","last_name":"Ares Santos","first_name":"Laura"},{"id":"27271","last_name":"Schumacher","first_name":"Stefan","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan"},{"id":"75127","full_name":"Sperling, Jan","last_name":"Sperling","first_name":"Jan","orcid":"0000-0002-5844-3205"}],"type":"journal_article","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"706"},{"_id":"35"},{"_id":"230"},{"_id":"623"},{"_id":"429"}],"date_created":"2025-09-12T10:37:34Z","issue":"3","publication":"Physical Review A"},{"type":"journal_article","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"35"},{"_id":"230"},{"_id":"27"}],"date_created":"2025-09-12T10:43:29Z","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n          <jats:p>The time-dependent one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral step for the Hamiltonian term with a variational step for the nonlinear term. The Hamiltonian term is treated as an integrating factor by forward and backward Fourier transforms, which are here carried out classically. This split allows us to avoid higher-order time integration schemes, to apply a first-order explicit time stepping for the remaining nonlinear NLSE term in a variational algorithm block, and thus to avoid numerical instabilities. We demonstrate that the analytical solution is reproduced with a small root mean square error for a long time interval over which a nonlinear soliton propagates significantly forward in space while keeping its shape. We analyze the accuracy and complexity of the quantum algorithm, the expressibility of the ansatz circuit and compare it with classical approaches. Furthermore, we investigate the influence of algorithm parameters on the accuracy of the results, including the temporal step width and the depth of the quantum circuit.</jats:p>"}],"issue":"1","publication":"Scientific Reports","doi":"10.1038/s41598-025-05660-3","article_number":"23478","language":[{"iso":"eng"}],"date_updated":"2025-09-12T10:57:22Z","publication_status":"published","intvolume":"        15","year":"2025","title":"Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm","publication_identifier":{"issn":["2045-2322"]},"author":[{"last_name":"Köcher","first_name":"Nikolas","full_name":"Köcher, Nikolas","id":"79191"},{"full_name":"Rose, Hendrik","orcid":"0000-0002-3079-5428","first_name":"Hendrik","last_name":"Rose","id":"55958"},{"first_name":"Sachin S.","last_name":"Bharadwaj","full_name":"Bharadwaj, Sachin S."},{"full_name":"Schumacher, Jörg","first_name":"Jörg","last_name":"Schumacher"},{"id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","first_name":"Stefan","orcid":"0000-0003-4042-4951"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"Hochleistungsrechner Noctua in Paderborn","_id":"445"}],"citation":{"mla":"Köcher, Nikolas, et al. “Numerical Solution of Nonlinear Schrödinger Equation by a Hybrid Pseudospectral-Variational Quantum Algorithm.” <i>Scientific Reports</i>, vol. 15, no. 1, 23478, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1038/s41598-025-05660-3\">10.1038/s41598-025-05660-3</a>.","bibtex":"@article{Köcher_Rose_Bharadwaj_Schumacher_Schumacher_2025, title={Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm}, volume={15}, DOI={<a href=\"https://doi.org/10.1038/s41598-025-05660-3\">10.1038/s41598-025-05660-3</a>}, number={123478}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Köcher, Nikolas and Rose, Hendrik and Bharadwaj, Sachin S. and Schumacher, Jörg and Schumacher, Stefan}, year={2025} }","ama":"Köcher N, Rose H, Bharadwaj SS, Schumacher J, Schumacher S. Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm. <i>Scientific Reports</i>. 2025;15(1). doi:<a href=\"https://doi.org/10.1038/s41598-025-05660-3\">10.1038/s41598-025-05660-3</a>","ieee":"N. Köcher, H. Rose, S. S. Bharadwaj, J. Schumacher, and S. Schumacher, “Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm,” <i>Scientific Reports</i>, vol. 15, no. 1, Art. no. 23478, 2025, doi: <a href=\"https://doi.org/10.1038/s41598-025-05660-3\">10.1038/s41598-025-05660-3</a>.","apa":"Köcher, N., Rose, H., Bharadwaj, S. S., Schumacher, J., &#38; Schumacher, S. (2025). Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm. <i>Scientific Reports</i>, <i>15</i>(1), Article 23478. <a href=\"https://doi.org/10.1038/s41598-025-05660-3\">https://doi.org/10.1038/s41598-025-05660-3</a>","chicago":"Köcher, Nikolas, Hendrik Rose, Sachin S. Bharadwaj, Jörg Schumacher, and Stefan Schumacher. “Numerical Solution of Nonlinear Schrödinger Equation by a Hybrid Pseudospectral-Variational Quantum Algorithm.” <i>Scientific Reports</i> 15, no. 1 (2025). <a href=\"https://doi.org/10.1038/s41598-025-05660-3\">https://doi.org/10.1038/s41598-025-05660-3</a>.","short":"N. Köcher, H. Rose, S.S. Bharadwaj, J. Schumacher, S. Schumacher, Scientific Reports 15 (2025)."},"user_id":"16199","volume":15,"publisher":"Springer Science and Business Media LLC","_id":"61246","status":"public"},{"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"citation":{"bibtex":"@article{Ai_Wingenbach_Yang_Wei_Hatzopoulos_Savvidis_Schumacher_Ma_Gao_2025, title={Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice}, volume={23}, DOI={<a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">10.1103/physrevapplied.23.024029</a>}, number={2024029}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Ai, Qiang and Wingenbach, Jan and Yang, Xinmiao and Wei, Jing and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Ma, Xuekai and Gao, Tingge}, year={2025} }","ama":"Ai Q, Wingenbach J, Yang X, et al. Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice. <i>Physical Review Applied</i>. 2025;23(2). doi:<a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">10.1103/physrevapplied.23.024029</a>","mla":"Ai, Qiang, et al. “Optically and Remotely Controlling Localization of Exciton-Polariton Condensates in a Potential Lattice.” <i>Physical Review Applied</i>, vol. 23, no. 2, 024029, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">10.1103/physrevapplied.23.024029</a>.","chicago":"Ai, Qiang, Jan Wingenbach, Xinmiao Yang, Jing Wei, Zaharias Hatzopoulos, Pavlos G. Savvidis, Stefan Schumacher, Xuekai Ma, and Tingge Gao. “Optically and Remotely Controlling Localization of Exciton-Polariton Condensates in a Potential Lattice.” <i>Physical Review Applied</i> 23, no. 2 (2025). <a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">https://doi.org/10.1103/physrevapplied.23.024029</a>.","short":"Q. Ai, J. Wingenbach, X. Yang, J. Wei, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, X. Ma, T. Gao, Physical Review Applied 23 (2025).","ieee":"Q. Ai <i>et al.</i>, “Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice,” <i>Physical Review Applied</i>, vol. 23, no. 2, Art. no. 024029, 2025, doi: <a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">10.1103/physrevapplied.23.024029</a>.","apa":"Ai, Q., Wingenbach, J., Yang, X., Wei, J., Hatzopoulos, Z., Savvidis, P. G., Schumacher, S., Ma, X., &#38; Gao, T. (2025). Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice. <i>Physical Review Applied</i>, <i>23</i>(2), Article 024029. <a href=\"https://doi.org/10.1103/physrevapplied.23.024029\">https://doi.org/10.1103/physrevapplied.23.024029</a>"},"user_id":"16199","volume":23,"_id":"61249","publisher":"American Physical Society (APS)","status":"public","type":"journal_article","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"230"},{"_id":"35"},{"_id":"27"}],"date_created":"2025-09-12T11:01:17Z","issue":"2","publication":"Physical Review Applied","doi":"10.1103/physrevapplied.23.024029","article_number":"024029","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-09-12T11:02:33Z","intvolume":"        23","year":"2025","title":"Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice","publication_identifier":{"issn":["2331-7019"]},"author":[{"first_name":"Qiang","last_name":"Ai","full_name":"Ai, Qiang"},{"id":"69187","first_name":"Jan","last_name":"Wingenbach","full_name":"Wingenbach, Jan"},{"full_name":"Yang, Xinmiao","last_name":"Yang","first_name":"Xinmiao"},{"full_name":"Wei, Jing","first_name":"Jing","last_name":"Wei"},{"full_name":"Hatzopoulos, Zaharias","last_name":"Hatzopoulos","first_name":"Zaharias"},{"first_name":"Pavlos G.","last_name":"Savvidis","full_name":"Savvidis, Pavlos G."},{"id":"27271","full_name":"Schumacher, Stefan","first_name":"Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"id":"59416","full_name":"Ma, Xuekai","first_name":"Xuekai","last_name":"Ma"},{"full_name":"Gao, Tingge","last_name":"Gao","first_name":"Tingge"}]},{"abstract":[{"lang":"eng","text":"Conductive ferroelectric domain walls (DWs) represent a promising topical system for the development of nanoelectronic components and device sensors to be operational at elevated temperatures. DWs show very different properties as compared to their hosting bulk crystal, in particular with respect to the high local electrical conductivity. The objective of this work is to demonstrate DW conductivity up to temperatures as high as 400 °C which extends previous studies significantly. Experimental investigation of the DW conductivity of charged, inclined DWs is performed using 5 mol % MgO-doped lithium niobate single crystals. Current–voltage (  ) curves are determined by DC electrometer measurements and impedance spectroscopy and found to be identical. Moreover, impedance spectroscopy enables to recognize artifacts such as damaged electrodes. Temperature dependent measurements over repeated heating cycles reveal two distinct thermal activation energies for a given DW, with the higher of the activation energies only measured at higher temperatures. Depending on the specific sample, the higher activation energy is found above 160 °C to 230 °C. This suggests, in turn, that more than one type of defect/polaron is involved, and that the dominant transport mechanism changes with increasing temperature. First principles atomistic modeling suggests that the conductivity of inclined domain walls cannot be solely explained by the formation of a 2D carrier gas and must be supported by hopping processes. This holds true even at temperatures as high as 400 °C. Our investigations underline the potential to extend DW current based nanoelectronic and sensor applications even into the so-far unexplored temperature range up to 400 °C."}],"publication":"Solid State Ionics","type":"journal_article","department":[{"_id":"15"},{"_id":"288"},{"_id":"623"}],"date_created":"2025-09-17T16:18:18Z","publication_status":"published","date_updated":"2025-09-17T16:19:51Z","article_type":"original","intvolume":"       429","title":"Demonstration of domain wall current in MgO-doped lithium niobate single crystals up to 400°C","year":"2025","author":[{"last_name":"Wulfmeier","first_name":"Hendrik","full_name":"Wulfmeier, Hendrik"},{"first_name":"Uliana","last_name":"Yakhnevych","full_name":"Yakhnevych, Uliana"},{"full_name":"Boekhoff, Cornelius","first_name":"Cornelius","last_name":"Boekhoff"},{"last_name":"Diima","first_name":"Allan","full_name":"Diima, Allan"},{"full_name":"Kunzner, Marlo","last_name":"Kunzner","first_name":"Marlo"},{"last_name":"Verhoff","first_name":"Leonard M.","full_name":"Verhoff, Leonard M."},{"first_name":"Jonas","last_name":"Paul","full_name":"Paul, Jonas"},{"full_name":"Ratzenberger, Julius","first_name":"Julius","last_name":"Ratzenberger"},{"first_name":"Elke","last_name":"Beyreuther","full_name":"Beyreuther, Elke"},{"last_name":"Gössel","first_name":"Joshua","full_name":"Gössel, Joshua"},{"last_name":"Kiseleva","first_name":"Iuliia","full_name":"Kiseleva, Iuliia"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501"},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."},{"full_name":"Fritze, Holger","last_name":"Fritze","first_name":"Holger"}],"publication_identifier":{"issn":["0167-2738"]},"doi":"10.1016/j.ssi.2025.116949","article_number":"116949","main_file_link":[{"url":"https://doi.org/10.1016/j.ssi.2025.116949","open_access":"1"}],"language":[{"iso":"eng"}],"quality_controlled":"1","citation":{"mla":"Wulfmeier, Hendrik, et al. “Demonstration of Domain Wall Current in MgO-Doped Lithium Niobate Single Crystals up to 400°C.” <i>Solid State Ionics</i>, vol. 429, 116949, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">10.1016/j.ssi.2025.116949</a>.","bibtex":"@article{Wulfmeier_Yakhnevych_Boekhoff_Diima_Kunzner_Verhoff_Paul_Ratzenberger_Beyreuther_Gössel_et al._2025, title={Demonstration of domain wall current in MgO-doped lithium niobate single crystals up to 400°C}, volume={429}, DOI={<a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">10.1016/j.ssi.2025.116949</a>}, number={116949}, journal={Solid State Ionics}, publisher={Elsevier BV}, author={Wulfmeier, Hendrik and Yakhnevych, Uliana and Boekhoff, Cornelius and Diima, Allan and Kunzner, Marlo and Verhoff, Leonard M. and Paul, Jonas and Ratzenberger, Julius and Beyreuther, Elke and Gössel, Joshua and et al.}, year={2025} }","ama":"Wulfmeier H, Yakhnevych U, Boekhoff C, et al. Demonstration of domain wall current in MgO-doped lithium niobate single crystals up to 400°C. <i>Solid State Ionics</i>. 2025;429. doi:<a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">10.1016/j.ssi.2025.116949</a>","ieee":"H. Wulfmeier <i>et al.</i>, “Demonstration of domain wall current in MgO-doped lithium niobate single crystals up to 400°C,” <i>Solid State Ionics</i>, vol. 429, Art. no. 116949, 2025, doi: <a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">10.1016/j.ssi.2025.116949</a>.","apa":"Wulfmeier, H., Yakhnevych, U., Boekhoff, C., Diima, A., Kunzner, M., Verhoff, L. M., Paul, J., Ratzenberger, J., Beyreuther, E., Gössel, J., Kiseleva, I., Rüsing, M., Sanna, S., Eng, L. M., &#38; Fritze, H. (2025). Demonstration of domain wall current in MgO-doped lithium niobate single crystals up to 400°C. <i>Solid State Ionics</i>, <i>429</i>, Article 116949. <a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">https://doi.org/10.1016/j.ssi.2025.116949</a>","chicago":"Wulfmeier, Hendrik, Uliana Yakhnevych, Cornelius Boekhoff, Allan Diima, Marlo Kunzner, Leonard M. Verhoff, Jonas Paul, et al. “Demonstration of Domain Wall Current in MgO-Doped Lithium Niobate Single Crystals up to 400°C.” <i>Solid State Ionics</i> 429 (2025). <a href=\"https://doi.org/10.1016/j.ssi.2025.116949\">https://doi.org/10.1016/j.ssi.2025.116949</a>.","short":"H. Wulfmeier, U. Yakhnevych, C. Boekhoff, A. Diima, M. Kunzner, L.M. Verhoff, J. Paul, J. Ratzenberger, E. Beyreuther, J. Gössel, I. Kiseleva, M. Rüsing, S. Sanna, L.M. Eng, H. Fritze, Solid State Ionics 429 (2025)."},"oa":"1","status":"public","user_id":"22501","volume":429,"_id":"61338","publisher":"Elsevier BV"}]