@inproceedings{63011, author = {{Wedekind, Lisa and Pollmeier, Pascal and Fechner, Sabine}}, booktitle = {{Entdecken, lehren und forschen im Schülerlabor}}, editor = {{van Vorst, Helena}}, location = {{Bochum}}, pages = {{145--148}}, title = {{{Analogiebildung in kontextorientierten Lernumgebungen}}}, volume = {{45}}, year = {{2025}}, } @article{63021, abstract = {{Bell measurements, entailing the projection onto one of the Bell states, play a key role in quantum information and communication, where the outcome of a variety of protocols crucially depends on the success probability of such measurements. Although in the case of qubit systems, Bell measurements can be implemented using only linear optical components, the same result is no longer true for qudits, where at least the use of ancillary photons is required. In order to circumvent this limitation, one possibility is to introduce nonlinear effects. In this work, we adopt the latter approach and propose a scalable Bell measurement scheme for high-dimensional states, exploiting multiple squeezer devices applied to a linear optical circuit for discriminating the different Bell states. Our approach does not require ancillary photons, is not limited by the dimension of the quantum states, and is experimentally scalable, thus paving the way toward the realization of an effective high-dimensional Bell measurement.}}, author = {{Bianchi, Luca and Marconi, Carlo and Sperling, Jan and Bacco, Davide}}, issn = {{2643-1564}}, journal = {{Physical Review Research}}, number = {{2}}, publisher = {{American Physical Society (APS)}}, title = {{{Predetection squeezing as a resource for high-dimensional Bell-state measurements}}}, doi = {{10.1103/physrevresearch.7.023038}}, volume = {{7}}, year = {{2025}}, } @inbook{62904, author = {{Riedl, Lars}}, booktitle = {{Sportwissenschaft. Themenfelder, Theorien und Methoden}}, editor = {{Burk, Verena and Fahrner, Marcel}}, pages = {{138 -- 160}}, publisher = {{UVK Verlag}}, title = {{{Sportsoziologie}}}, doi = {{10.36198/9783838564517}}, year = {{2025}}, } @article{62859, abstract = {{Frequency-filtered photon correlations have been proven to be extremely useful in grasping how the detection process alters photon statistics. Harnessing the spectral correlations also permits refinement of the emission and unraveling of previously hidden strong correlations in a plethora of quantum-optical systems under continuous-wave excitation. In this work, we investigate such correlations for time-dependent excitation and develop a methodology to compute efficiently time-integrated correlations, which are at the heart of the photon-counting theory, and subsequently apply it to analyze the photon emission of pulsed systems. By combining this formalism with the —which facilitates frequency-resolved correlations—we demonstrate how spectral filtering enhances single-photon purity and suppresses multiphoton noise in time-bin-encoded quantum states. Specifically, filtering the central spectral peak of a dynamically driven two-level system boosts temporal coherence and improves the fidelity of time-bin entanglement preparation, even under conditions favoring multiphoton emission. These results establish spectral filtering as a critical tool for tailoring photon statistics in pulsed quantum light sources.}}, author = {{Bermúdez-Feijóo, Santiago and Zubizarreta Casalengua, Eduardo and Müller, Kai and Jöns, Klaus}}, issn = {{2643-1564}}, journal = {{Physical Review Research}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Spectral correlations of dynamical resonance fluorescence}}}, doi = {{10.1103/jmy9-bd3l}}, volume = {{7}}, year = {{2025}}, } @misc{63050, author = {{Güsken, Nicholas Alexander}}, title = {{{Beam steering device and electronic apparatus including the same}}}, year = {{2025}}, } @article{62269, abstract = {{The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Nevertheless, compatibility with certain quantum light sources and superconducting detectors requires operation under cryogenic conditions. We characterize alterations in phase-matching and mode guiding of a non-degenerate spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm, under cryogenic conditions. Despite the effects of pyroelectricity and photorefraction, the spectral properties match our theoretical model. Nevertheless, these effects cause small but significant variations within and between cooling cycles. These measurements provide a first benchmark against which other nonlinear photonic integration platforms, such as thin-film lithium niobate, can be compared.}}, author = {{Lange, Nina Amelie and Lengeling, Sebastian and Mues, Philipp and Quiring, Viktor and Ridder, Werner and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{24}}, publisher = {{Optica Publishing Group}}, title = {{{Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides}}}, doi = {{10.1364/oe.578108}}, volume = {{33}}, year = {{2025}}, } @inproceedings{62949, author = {{Fechner, Sabine and Cornelius, Soraya and Pollmeier, Pascal and Siepmann, Karin and Rubner, Isabel}}, booktitle = {{Digitale Transformation für Schule und Lehrkräfteausbildung gestalten}}, keywords = {{Digital, Digitalisierung, Künstliche Intelligenz, KI, Messsensoren, Fortbildung, Lehrkräfte, Chemie}}, location = {{Potsdam}}, title = {{{Digitalisierungsbezogene Kompetenzen im Chemieunterricht fördern – Ein Kurs für Lehrkräfte}}}, year = {{2025}}, } @inproceedings{62952, author = {{Pollmeier, Pascal and Ditter, David and Weiser, David and Siepmann, Karin and Ditter, Rebecca and Rubner, Isabel and Ponath, Jonas and Fechner, Sabine and Hoffmann, Adrian and Sommer, Katrin and Grandrath, Rebecca and Bohrmann-Linde, Claudia}}, booktitle = {{16th Conference of The European Science Education Research Association (ESERA)}}, keywords = {{Digital, Digitalisierung, Künstliche Intelligenz, KI, Messsensoren, Fortbildung, Lehrkräfte, Chemie}}, location = {{Copenhagen}}, title = {{{Fostering digitalisation-related competences of chemistry teachers}}}, year = {{2025}}, } @inproceedings{62921, author = {{Fox, Marvin Lee and Peeters, Hendrik and Fechner, Sabine}}, booktitle = {{Conference of The European Science Education Research Association (ESERA)}}, keywords = {{Artificial intelligence, education, chemistry}}, location = {{Copenhagen, Denmark}}, title = {{{How can students be supported by ChatGPT as a tutor in hands-on chemistry education?}}}, year = {{2025}}, } @inproceedings{62934, author = {{Peeters, Hendrik and Habig, Sebastian and Fechner, Sabine}}, booktitle = {{Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V. (GDCP)}}, location = {{Frankfurt am Main}}, title = {{{Prompting bei AR-gestütztem Experimentieren im Chemieunterricht}}}, year = {{2025}}, } @article{60466, author = {{Brockmeier, Julian and Schapeler, Timon and Lange, Nina Amelie and Höpker, Jan Philipp and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}}, journal = {{New Journal of Physics}}, title = {{{Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes}}}, doi = {{10.1088/1367-2630/ade46c}}, year = {{2025}}, } @article{60194, author = {{Peeters, Hendrik and Hansel, Jan-Luca and Graute, André and Fischer, Matthias and Weinberger, Christian and Neiske, Iris and Fechner, Sabine}}, journal = {{Laborpraxis}}, number = {{5-6}}, pages = {{22--25}}, title = {{{Virtual Reality trifft Künstliche Intelligenz. KI unterstützt bei virtueller Praktikumsvorbereitung}}}, year = {{2025}}, } @article{63160, author = {{Rose, Hendrik and Schumacher, Stefan and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{24}}, publisher = {{American Physical Society (APS)}}, title = {{{Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons}}}, doi = {{10.1103/528f-7smh}}, volume = {{112}}, year = {{2025}}, } @article{62861, author = {{Laneve, Alessandro and Ronco, Giuseppe and Beccaceci, Mattia and Barigelli, Paolo and Salusti, Francesco and Claro-Rodriguez, Nicolas and De Pascalis, Giorgio and Suprano, Alessia and Chiaudano, Leone and Schöll, Eva and Hanschke, Lukas and Krieger, Tobias M. and Buchinger, Quirin and Covre da Silva, Saimon F. and Neuwirth, Julia and Stroj, Sandra and Höfling, Sven and Huber-Loyola, Tobias and Usuga Castaneda, Mario A. and Carvacho, Gonzalo and Spagnolo, Nicolò and Rota, Michele B. and Basso Basset, Francesco and Rastelli, Armando and Sciarrino, Fabio and Jöns, Klaus and Trotta, Rinaldo}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Quantum teleportation with dissimilar quantum dots over a hybrid quantum network}}}, doi = {{10.1038/s41467-025-65911-9}}, volume = {{16}}, year = {{2025}}, } @article{63192, abstract = {{Lithium niobate (LiNbO3) is a widely used material with several desirable physical properties, such as high second-order nonlinear optical and strong electro-optical effects. Thus LiNbO3 is used for various applications such as electro-optic modulation or nonlinear frequency conversion and mixing. But LiNbO3 also exhibits a strong photorefractive effect, which limits the intensity of the optical fields involved. Various approaches to reduce the photorefractive effect have been investigated, such as increasing the temperature, doping the crystal or using different waveguide designs in LiNbO3. Here, we present an analysis of the approach to increase the photorefractive damage threshold by using different waveguide designs. Contrary to previous claims and investigations, our SHG measurements revealed no significant difference in resistance to photorefractive damage when comparing conventional Ti-doped channel waveguides and Ti-doped diced ridge waveguides in LiNbO3. Furthermore, we have investigated the effect of photorefractive cleaning and curing using a light field at 532 nm. Here, we observe a reduction in the photorefractive effect at room temperature during and after SHG measurements, which is an easy alternative to conventional approaches.}}, author = {{Kirsch, Michelle and Kießler, Christian and Lengeling, Sebastian and Stefszky, Michael and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine}}, issn = {{0030-3992}}, journal = {{Optics & Laser Technology}}, publisher = {{Elsevier BV}}, title = {{{Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides}}}, doi = {{10.1016/j.optlastec.2025.114260}}, volume = {{193}}, year = {{2025}}, } @article{63213, abstract = {{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.}}, author = {{Serino, Laura Maria and Chesi, Giovanni and Brecht, Benjamin and Maccone, Lorenzo and Macchiavello, Chiara and Silberhorn, Christine}}, issn = {{2643-1564}}, journal = {{Physical Review Research}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations}}}, doi = {{10.1103/v24q-sl6n}}, volume = {{7}}, year = {{2025}}, } @inbook{63212, author = {{Riese, Josef and Reinhold, Peter}}, booktitle = {{Handbuch Lehrerinnen- und Lehrerbildung}}, editor = {{Cramer, Colin and König, Johannes and Rothland, Martin}}, isbn = {{978-3-8365-6544-6}}, publisher = {{Verlag Julius Klinkhardt}}, title = {{{Physik in der Lehrerinnen- und Lehrerbildung - Empirisch fundierte Curricula in einer digitalen Welt}}}, doi = {{10.35468/hblb2025-076}}, year = {{2025}}, } @article{63214, abstract = {{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.}}, author = {{Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin and Kolobov, Mikhail I.}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{2}}, publisher = {{American Physical Society (APS)}}, title = {{{Time-resolved second-order autocorrelation function of parametric down-conversion}}}, doi = {{10.1103/7ckm-tm3r}}, volume = {{112}}, year = {{2025}}, } @article{63215, abstract = {{Abstract 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.}}, author = {{Serino, Laura Maria and Rambach, Markus and Brecht, Benjamin and Romero, Jacquiline and Silberhorn, Christine}}, issn = {{2058-9565}}, journal = {{Quantum Science and Technology}}, number = {{2}}, publisher = {{IOP Publishing}}, title = {{{Self-guided tomography of time-frequency qudits}}}, doi = {{10.1088/2058-9565/adb0ea}}, volume = {{10}}, year = {{2025}}, } @article{62906, abstract = {{Ausgangspunkt des Beitrags sind die wiederkehrenden Zuschauerproteste gegen die Kommerzialisierung des Fußballs und die Frage nach einer Erklärung für deren Entstehung. Gezeigt wird, dass Zuschauerproteste bereits umfassend beforscht sind, bislang allerdings keine theoretische Einordung zu ihrer Entwicklung vorgelegt wurde. Entsprechend liegt das Ziel des Beitrags darin, unter Rückgriff auf systemtheoretische Überlegungen, insbesondere auch zur Funktion des Publikums für den Fußball, und typologische Unterscheidungen, angereichert durch kulturanthropologische Betrachtungen, theoretische Erklärungen für die Ursprünge und Bedeutung von Zuschauerprotesten zu liefern. Im Anschluss hieran wird betrachtet, wie sich Zuschauerproteste in theoretische Konzepte zu Protestbewegungen einordnen lassen, um abschließend deren Nutzen für die Fußballclubs und -verbände zu bestimmen.}}, author = {{Riedl, Lars and Meier, Heiko}}, issn = {{2568-0420}}, journal = {{FuG – Zeitschrift für Fußball und Gesellschaft}}, number = {{2-2023}}, pages = {{97 -- 119}}, publisher = {{Verlag Barbara Budrich GmbH}}, title = {{{Protest gegen Kommerzialisierung im Fußball: Theoretische Überlegungen zu Entstehung, Strukturen und Nutzen}}}, doi = {{10.3224/fug.v5i2.02}}, volume = {{5}}, year = {{2025}}, }