[{"place":"Paderborn","oa":"1","file_date_updated":"2026-03-25T11:50:30Z","citation":{"ama":"Ehtesabi S, Hossain M, Kenter T, et al. Otus Supercomputer. Vol 1. Paderborn Center for Parallel Computing (PC2); 2025. doi:10.48550/ARXIV.2512.07401","bibtex":"@book{Ehtesabi_Hossain_Kenter_Krawinkel_Ostermann_Plessl_Riebler_Rohde_Schade_Schwarz_et al._2025, place={Paderborn}, series={PC2 Tech­nic­al Re­port Series}, title={Otus Supercomputer}, volume={1}, DOI={10.48550/ARXIV.2512.07401}, publisher={Paderborn Center for Parallel Computing (PC2)}, author={Ehtesabi, Sadaf and Hossain, Manoar and Kenter, Tobias and Krawinkel, Andreas and Ostermann, Lukas and Plessl, Christian and Riebler, Heinrich and Rohde, Stefan and Schade, Robert and Schwarz, Michael and et al.}, year={2025}, collection={PC2 Tech­nic­al Re­port Series} }","mla":"Ehtesabi, Sadaf, et al. Otus Supercomputer. Paderborn Center for Parallel Computing (PC2), 2025, doi:10.48550/ARXIV.2512.07401.","short":"S. Ehtesabi, M. Hossain, T. Kenter, A. Krawinkel, L. Ostermann, C. Plessl, H. Riebler, S. Rohde, R. Schade, M. Schwarz, J. Simon, N. Winnwa, A. Wiens, X. Wu, Otus Supercomputer, Paderborn Center for Parallel Computing (PC2), Paderborn, 2025.","chicago":"Ehtesabi, Sadaf, Manoar Hossain, Tobias Kenter, Andreas Krawinkel, Lukas Ostermann, Christian Plessl, Heinrich Riebler, et al. Otus Supercomputer. Vol. 1. PC2 Tech­nic­al Re­port Series. Paderborn: Paderborn Center for Parallel Computing (PC2), 2025. https://doi.org/10.48550/ARXIV.2512.07401.","apa":"Ehtesabi, S., Hossain, M., Kenter, T., Krawinkel, A., Ostermann, L., Plessl, C., Riebler, H., Rohde, S., Schade, R., Schwarz, M., Simon, J., Winnwa, N., Wiens, A., & Wu, X. (2025). Otus Supercomputer (Vol. 1). Paderborn Center for Parallel Computing (PC2). https://doi.org/10.48550/ARXIV.2512.07401","ieee":"S. Ehtesabi et al., Otus Supercomputer, vol. 1. Paderborn: Paderborn Center for Parallel Computing (PC2), 2025."},"report_number":"PC2TR-2025-1","page":"33","publisher":"Paderborn Center for Parallel Computing (PC2)","_id":"62981","ddc":["004"],"user_id":"23522","volume":1,"status":"public","has_accepted_license":"1","file":[{"content_type":"application/pdf","file_id":"62982","file_size":4535595,"access_level":"open_access","file_name":"2512.07401v1.pdf","date_updated":"2026-03-25T11:50:30Z","relation":"main_file","date_created":"2025-12-09T09:19:12Z","creator":"deffel"}],"date_created":"2025-12-09T09:11:04Z","type":"report","keyword":["Otus","Supercomputer","FPGA","PC2","Paderborn Center for Parallel Computing","Noctua 2","HPC"],"department":[{"_id":"27"},{"_id":"518"}],"abstract":[{"text":"Otus is a high-performance computing cluster that was launched in 2025 and is operated by the Paderborn Center for Parallel Computing (PC2) at Paderborn University in Germany. The system is part of the National High Performance Computing (NHR) initiative. Otus complements the previous supercomputer Noctua 2, offering approximately twice the computing power while retaining the three node types that were characteristic of Noctua 2: 1) CPU compute nodes with different memory capacities, 2) high-end GPU nodes, and 3) HPC-grade FPGA nodes. On the Top500 list, which ranks the 500 most powerful supercomputers in the world, Otus is in position 164 with the CPU partition and in position 255 with the GPU partition (June 2025). On the Green500 list, ranking the 500 most energy-efficient supercomputers in the world, Otus is in position 5 with the GPU partition (June 2025).\r\n\r\n\r\nThis article provides a comprehensive overview of the system in terms of its hardware, software, system integration, and its overall integration into the data center building to ensure energy-efficient operation. The article aims to provide unique insights for scientists using the system and for other centers operating HPC clusters. The article will be continuously updated to reflect the latest system setup and measurements. ","lang":"eng"}],"language":[{"iso":"eng"}],"series_title":"PC2 Tech­nic­al Re­port Series","doi":"10.48550/ARXIV.2512.07401","year":"2025","title":"Otus Supercomputer","author":[{"id":"116116","full_name":"Ehtesabi, Sadaf","last_name":"Ehtesabi","first_name":"Sadaf"},{"id":"114619","orcid":"https://orcid.org/0000-0002-0737-7981","first_name":"Manoar","last_name":"Hossain","full_name":"Hossain, Manoar"},{"id":"3145","full_name":"Kenter, Tobias","first_name":"Tobias","last_name":"Kenter"},{"id":"15275","full_name":"Krawinkel, Andreas","first_name":"Andreas","last_name":"Krawinkel"},{"last_name":"Ostermann","first_name":"Lukas","full_name":"Ostermann, Lukas","id":"69976"},{"id":"16153","last_name":"Plessl","orcid":"0000-0001-5728-9982","first_name":"Christian","full_name":"Plessl, Christian"},{"first_name":"Heinrich","last_name":"Riebler","full_name":"Riebler, Heinrich","id":"8961"},{"first_name":"Stefan","last_name":"Rohde","full_name":"Rohde, Stefan","id":"34009"},{"id":"75963","full_name":"Schade, Robert","last_name":"Schade","orcid":"0000-0002-6268-5397","first_name":"Robert"},{"id":"5312","last_name":"Schwarz","first_name":"Michael","full_name":"Schwarz, Michael"},{"first_name":"Jens","last_name":"Simon","full_name":"Simon, Jens","id":"15273"},{"id":"61189","full_name":"Winnwa, Nils","last_name":"Winnwa","first_name":"Nils"},{"orcid":"0000-0003-1764-9773","first_name":"Alex","last_name":"Wiens","full_name":"Wiens, Alex","id":"23522"},{"last_name":"Wu","first_name":"Xin","full_name":"Wu, Xin","id":"77439"}],"date_updated":"2026-03-25T11:50:31Z","publication_status":"published","intvolume":" 1"},{"_id":"56131","page":"85-120","volume":45,"user_id":"32202","status":"public","oa":"1","citation":{"bibtex":"@article{Hoffmann_2025, title={Symmetry as a Topic for the University Education of Pre-Service Teachers}, volume={45}, DOI={10.46298/rdm.14256}, number={2}, journal={Recherches en Didactique des Mathématiques}, author={Hoffmann, Max}, year={2025}, pages={85–120} }","ama":"Hoffmann M. Symmetry as a Topic for the University Education of Pre-Service Teachers. Recherches en Didactique des Mathématiques. 2025;45(2):85-120. doi:10.46298/rdm.14256","mla":"Hoffmann, Max. “Symmetry as a Topic for the University Education of Pre-Service Teachers.” Recherches En Didactique Des Mathématiques, vol. 45, no. 2, 2025, pp. 85–120, doi:10.46298/rdm.14256.","chicago":"Hoffmann, Max. “Symmetry as a Topic for the University Education of Pre-Service Teachers.” Recherches En Didactique Des Mathématiques 45, no. 2 (2025): 85–120. https://doi.org/10.46298/rdm.14256.","short":"M. Hoffmann, Recherches En Didactique Des Mathématiques 45 (2025) 85–120.","ieee":"M. Hoffmann, “Symmetry as a Topic for the University Education of Pre-Service Teachers,” Recherches en Didactique des Mathématiques, vol. 45, no. 2, pp. 85–120, 2025, doi: 10.46298/rdm.14256.","apa":"Hoffmann, M. (2025). Symmetry as a Topic for the University Education of Pre-Service Teachers. Recherches En Didactique Des Mathématiques, 45(2), 85–120. https://doi.org/10.46298/rdm.14256"},"quality_controlled":"1","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://rdm.episciences.org/17761/pdf","open_access":"1"}],"doi":"10.46298/rdm.14256","author":[{"id":"32202","full_name":"Hoffmann, Max","orcid":"0000-0002-6964-7123","last_name":"Hoffmann","first_name":"Max"}],"title":"Symmetry as a Topic for the University Education of Pre-Service Teachers","year":"2025","intvolume":" 45","article_type":"original","date_updated":"2026-03-30T13:52:29Z","publication_status":"published","date_created":"2024-09-14T08:08:22Z","department":[{"_id":"97"},{"_id":"643"}],"type":"journal_article","publication":"Recherches en Didactique des Mathématiques","issue":"2","abstract":[{"lang":"eng","text":"This article provides a comprehensive mathematical-didactic analysis of how the highly relevant topic symmetry can be prepared for the university education of PSTs. Methodologically, the analysis is embedded in a design research cycle and serves as preparation for the actual design of learning activities. The procedure of \"specifying and structuring\" learning objects is used and adapted in such a way that, in addition to mathematical aspects, profession-oriented references to school mathematics are also considered. An essential result of the analysis is the formulation of so-called interface aspects to symmetry, which prove to be helpful in establishing such references. "}]},{"quality_controlled":"1","publication":"Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14)","citation":{"bibtex":"@inproceedings{Hoffmann_2025, title={Using scriptwriting as a response format for interface tasks: Exemplary analyses in the context of symmetry}, booktitle={Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14)}, publisher={Free University of Bozen-Bolzano and ERME}, author={Hoffmann, Max}, editor={Bosch, Marianna and Bolondi, Giorgio and Carreira, Susana and Gaidoschik, Michael and Spagnolo, Camilla}, year={2025}, pages={2245–2252} }","chicago":"Hoffmann, Max. “Using Scriptwriting as a Response Format for Interface Tasks: Exemplary Analyses in the Context of Symmetry.” In Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14), edited by Marianna Bosch, Giorgio Bolondi, Susana Carreira, Michael Gaidoschik, and Camilla Spagnolo, 2245–52. Free University of Bozen-Bolzano and ERME, 2025.","short":"M. Hoffmann, in: M. Bosch, G. Bolondi, S. Carreira, M. Gaidoschik, C. Spagnolo (Eds.), Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14), Free University of Bozen-Bolzano and ERME, 2025, pp. 2245–2252.","ama":"Hoffmann M. Using scriptwriting as a response format for interface tasks: Exemplary analyses in the context of symmetry. In: Bosch M, Bolondi G, Carreira S, Gaidoschik M, Spagnolo C, eds. Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14). Free University of Bozen-Bolzano and ERME; 2025:2245-2252.","ieee":"M. Hoffmann, “Using scriptwriting as a response format for interface tasks: Exemplary analyses in the context of symmetry,” in Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14), 2025, pp. 2245–2252.","mla":"Hoffmann, Max. “Using Scriptwriting as a Response Format for Interface Tasks: Exemplary Analyses in the Context of Symmetry.” Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14), edited by Marianna Bosch et al., Free University of Bozen-Bolzano and ERME, 2025, pp. 2245–52.","apa":"Hoffmann, M. (2025). Using scriptwriting as a response format for interface tasks: Exemplary analyses in the context of symmetry. In M. Bosch, G. Bolondi, S. Carreira, M. Gaidoschik, & C. Spagnolo (Eds.), Proceedings of the Fourteenth Congress of the European Society for Research in Mathematics Education (CERME14) (pp. 2245–2252). Free University of Bozen-Bolzano and ERME."},"type":"conference","oa":"1","department":[{"_id":"97"},{"_id":"643"}],"date_created":"2026-03-30T14:57:31Z","date_updated":"2026-03-30T15:03:09Z","publication_status":"published","year":"2025","title":"Using scriptwriting as a response format for interface tasks: Exemplary analyses in the context of symmetry","status":"public","author":[{"last_name":"Hoffmann","first_name":"Max","full_name":"Hoffmann, Max"}],"user_id":"32202","editor":[{"first_name":"Marianna","last_name":"Bosch","full_name":"Bosch, Marianna"},{"full_name":"Bolondi, Giorgio","first_name":"Giorgio","last_name":"Bolondi"},{"first_name":"Susana","last_name":"Carreira","full_name":"Carreira, Susana"},{"full_name":"Gaidoschik, Michael","first_name":"Michael","last_name":"Gaidoschik"},{"full_name":"Spagnolo, Camilla","first_name":"Camilla","last_name":"Spagnolo"}],"main_file_link":[{"url":"https://hal.science/CERME14/hal-05237875v1","open_access":"1"}],"page":"2245-2252","_id":"65246","publisher":"Free University of Bozen-Bolzano and ERME","language":[{"iso":"eng"}]},{"status":"public","title":"Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound","year":"2025","author":[{"first_name":"Elmar","last_name":"Moritzer","full_name":"Moritzer, Elmar","id":"20531"},{"id":"70091","full_name":"Brandes, Philipp","first_name":"Philipp","orcid":"0009-0005-9707-0885","last_name":"Brandes"},{"full_name":"Wittler, Maurice","last_name":"Wittler","first_name":"Maurice","id":"76071"},{"full_name":"Claes, Leander","last_name":"Claes","first_name":"Leander","orcid":"0000-0002-4393-268X","id":"11829"},{"first_name":"Mareen","last_name":"Wippermann","full_name":"Wippermann, Mareen","id":"74624"},{"full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd","id":"213"}],"date_updated":"2026-03-30T14:20:00Z","_id":"63441","language":[{"iso":"eng"}],"user_id":"59363","publication":"40th International Conference of the Polymer Processing Society","citation":{"ieee":"E. Moritzer, P. Brandes, M. Wittler, L. Claes, M. Wippermann, and B. Henning, “Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound,” 2025.","apa":"Moritzer, E., Brandes, P., Wittler, M., Claes, L., Wippermann, M., & Henning, B. (2025). Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound. 40th International Conference of the Polymer Processing Society.","mla":"Moritzer, Elmar, et al. “Non-Destructive Fiber-Matrix Adhesion Measurement of Glass Fiber Reinforced Thermoplastic Composite Laminates Using Ultrasound.” 40th International Conference of the Polymer Processing Society, 2025.","bibtex":"@inproceedings{Moritzer_Brandes_Wittler_Claes_Wippermann_Henning_2025, title={Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound}, booktitle={40th International Conference of the Polymer Processing Society}, author={Moritzer, Elmar and Brandes, Philipp and Wittler, Maurice and Claes, Leander and Wippermann, Mareen and Henning, Bernd}, year={2025} }","ama":"Moritzer E, Brandes P, Wittler M, Claes L, Wippermann M, Henning B. Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound. In: 40th International Conference of the Polymer Processing Society. ; 2025.","short":"E. Moritzer, P. Brandes, M. Wittler, L. Claes, M. Wippermann, B. Henning, in: 40th International Conference of the Polymer Processing Society, 2025.","chicago":"Moritzer, Elmar, Philipp Brandes, Maurice Wittler, Leander Claes, Mareen Wippermann, and Bernd Henning. “Non-Destructive Fiber-Matrix Adhesion Measurement of Glass Fiber Reinforced Thermoplastic Composite Laminates Using Ultrasound.” In 40th International Conference of the Polymer Processing Society, 2025."},"project":[{"name":"FaMOUS: Ein ultraschallbasiertes Messverfahren unter Berücksichtigung viskoelastischer Eigenschaften zur Charakterisierung der Faser-Matrix-Haftung bei Organoblechen sowie deren realitätsnahe Modellierung","grant_number":"495847374","_id":"157"}],"date_created":"2026-01-05T08:42:55Z","type":"conference","keyword":["Faser-Kunststoff-Verbunde (FKV)","Faserverstärkte Kunststoffe (FVK)","Organobleche","Ultraschall"],"department":[{"_id":"9"},{"_id":"321"},{"_id":"367"},{"_id":"49"}]},{"oa":"1","department":[{"_id":"58"},{"_id":"623"}],"type":"conference","date_created":"2025-05-14T11:08:07Z","project":[{"_id":"175","name":"TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)"},{"_id":"302","name":"PONyDAC: SPP 2111 - PONyDAC II - Präziser Optischer Nyquist-Puls-Synthesizer DAC"}],"abstract":[{"lang":"eng","text":"We present an electronic-photonic co-designed Mach-Zehnder modulator with linear segment drivers in a photonic SOI-CMOS technology with an EO 3-dB bandwidth of ≥ 27 GHz and data transmission up to 64 Gbit/s without pre-emphasis."}],"citation":{"mla":"Kress, Christian, et al. High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology .","bibtex":"@inproceedings{Kress_Schwabe_Mihaylov_Scheytt, title={High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology }, author={Kress, Christian and Schwabe, Tobias and Mihaylov, Martin Miroslavov and Scheytt, J. Christoph} }","ama":"Kress C, Schwabe T, Mihaylov MM, Scheytt JC. High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology .","ieee":"C. Kress, T. Schwabe, M. M. Mihaylov, and J. C. Scheytt, “High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology ,” presented at the CLEO: Conference on Lasers and Electro-Optics, Long Beach, CA, USA.","apa":"Kress, C., Schwabe, T., Mihaylov, M. M., & Scheytt, J. C. (n.d.). High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology . CLEO: Conference on Lasers and Electro-Optics, Long Beach, CA, USA.","short":"C. Kress, T. Schwabe, M.M. Mihaylov, J.C. Scheytt, in: n.d.","chicago":"Kress, Christian, Tobias Schwabe, Martin Miroslavov Mihaylov, and J. Christoph Scheytt. “High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology ,” n.d."},"user_id":"13256","_id":"59896","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://ieeexplore.ieee.org/document/11190539","open_access":"1"}],"date_updated":"2026-03-31T09:06:49Z","publication_status":"accepted","conference":{"end_date":"2025-05-09","location":"Long Beach, CA, USA","start_date":"2025-05-04","name":"CLEO: Conference on Lasers and Electro-Optics"},"author":[{"first_name":"Christian","last_name":"Kress","orcid":"0000-0002-4403-2237","full_name":"Kress, Christian","id":"13256"},{"id":"39217","full_name":"Schwabe, Tobias","last_name":"Schwabe","first_name":"Tobias"},{"id":"42449","last_name":"Mihaylov","first_name":"Martin Miroslavov","full_name":"Mihaylov, Martin Miroslavov"},{"full_name":"Scheytt, J. Christoph","orcid":"0000-0002-5950-6618 ","first_name":"J. Christoph","last_name":"Scheytt","id":"37144"}],"title":"High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in Photonic 45nm SOI-CMOS Technology ","status":"public","year":"2025"},{"intvolume":" 35","article_type":"original","date_updated":"2026-03-31T09:07:17Z","publication_status":"inpress","author":[{"id":"70575","first_name":"Benjamin","last_name":"Delarue","full_name":"Delarue, Benjamin"},{"full_name":"Hilgert, Joachim","first_name":"Joachim","last_name":"Hilgert","id":"220"}],"publication_identifier":{"issn":["0949-5932"]},"year":"2025","title":"Quantum resonances and scattering poles of classical rank one locally symmetric spaces","language":[{"iso":"eng"}],"abstract":[{"text":"For negatively curved symmetric spaces it is known that the poles of the\r\nscattering matrices defined via the standard intertwining operators for the\r\nspherical principal representations of the isometry group are either given as\r\npoles of the intertwining operators or as quantum resonances, i.e. poles of the\r\nmeromorphically continued resolvents of the Laplace-Beltrami operator. We\r\nextend this result to classical locally symmetric spaces of negative curvature\r\nwith convex-cocompact fundamental group using results of Bunke and Olbrich. The\r\nmethod of proof forces us to exclude the spectral parameters corresponding to\r\nsingular Poisson transforms.","lang":"eng"}],"issue":"(4)","publication":"Journal of Lie Theory","department":[{"_id":"548"}],"type":"journal_article","date_created":"2024-04-11T12:31:18Z","status":"public","volume":35,"user_id":"220","_id":"53413","page":"787--804","citation":{"bibtex":"@article{Delarue_Hilgert, title={Quantum resonances and scattering poles of classical rank one locally  symmetric spaces}, volume={35}, number={(4)}, journal={Journal of Lie Theory}, author={Delarue, Benjamin and Hilgert, Joachim}, pages={787--804} }","ama":"Delarue B, Hilgert J. Quantum resonances and scattering poles of classical rank one locally  symmetric spaces. Journal of Lie Theory. 35((4)):787--804.","mla":"Delarue, Benjamin, and Joachim Hilgert. “Quantum Resonances and Scattering Poles of Classical Rank One Locally  Symmetric Spaces.” Journal of Lie Theory, vol. 35, no. (4), pp. 787--804.","chicago":"Delarue, Benjamin, and Joachim Hilgert. “Quantum Resonances and Scattering Poles of Classical Rank One Locally  Symmetric Spaces.” Journal of Lie Theory 35, no. (4) (n.d.): 787--804.","short":"B. Delarue, J. Hilgert, Journal of Lie Theory 35 (n.d.) 787--804.","ieee":"B. Delarue and J. Hilgert, “Quantum resonances and scattering poles of classical rank one locally  symmetric spaces,” Journal of Lie Theory, vol. 35, no. (4), pp. 787--804.","apa":"Delarue, B., & Hilgert, J. (n.d.). Quantum resonances and scattering poles of classical rank one locally  symmetric spaces. Journal of Lie Theory, 35((4)), 787--804."}},{"doi":" 10.5162/SMSI2025/A5.4","user_id":"11829","_id":"60504","language":[{"iso":"eng"}],"date_updated":"2026-04-08T08:51:39Z","title":"Ultrasonic phased array interface using programmable I/O and microprocessor clock synchronisation","year":"2025","status":"public","conference":{"end_date":"2025-05-08","start_date":"2025-05-06","name":"SMSI 2025","location":"Nürnberg"},"author":[{"first_name":"Tom","last_name":"Nellius","full_name":"Nellius, Tom"},{"last_name":"Henne","first_name":"Kevin","full_name":"Henne, Kevin","id":"56918"},{"full_name":"Hartinger, Maximilian","first_name":"Maximilian","last_name":"Hartinger"},{"id":"24769","full_name":"Meihost, Lars","first_name":"Lars","last_name":"Meihost"},{"first_name":"Tim","last_name":"Hetkämper","full_name":"Hetkämper, Tim","id":"38123"},{"id":"32580","last_name":"Zeipert","first_name":"Henning","full_name":"Zeipert, Henning"},{"full_name":"Claes, Leander","first_name":"Leander","last_name":"Claes","orcid":"0000-0002-4393-268X","id":"11829"},{"full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd","id":"213"}],"type":"conference","department":[{"_id":"49"}],"date_created":"2025-07-03T07:17:54Z","citation":{"mla":"Nellius, Tom, et al. Ultrasonic Phased Array Interface Using Programmable I/O and Microprocessor Clock Synchronisation. 2025, doi: 10.5162/SMSI2025/A5.4.","bibtex":"@inproceedings{Nellius_Henne_Hartinger_Meihost_Hetkämper_Zeipert_Claes_Henning_2025, title={Ultrasonic phased array interface using programmable I/O and microprocessor clock synchronisation}, DOI={ 10.5162/SMSI2025/A5.4}, author={Nellius, Tom and Henne, Kevin and Hartinger, Maximilian and Meihost, Lars and Hetkämper, Tim and Zeipert, Henning and Claes, Leander and Henning, Bernd}, year={2025} }","ama":"Nellius T, Henne K, Hartinger M, et al. Ultrasonic phased array interface using programmable I/O and microprocessor clock synchronisation. In: ; 2025. doi: 10.5162/SMSI2025/A5.4","ieee":"T. Nellius et al., “Ultrasonic phased array interface using programmable I/O and microprocessor clock synchronisation,” presented at the SMSI 2025, Nürnberg, 2025, doi: 10.5162/SMSI2025/A5.4.","apa":"Nellius, T., Henne, K., Hartinger, M., Meihost, L., Hetkämper, T., Zeipert, H., Claes, L., & Henning, B. (2025). Ultrasonic phased array interface using programmable I/O and microprocessor clock synchronisation. SMSI 2025, Nürnberg. https://doi.org/ 10.5162/SMSI2025/A5.4","chicago":"Nellius, Tom, Kevin Henne, Maximilian Hartinger, Lars Meihost, Tim Hetkämper, Henning Zeipert, Leander Claes, and Bernd Henning. “Ultrasonic Phased Array Interface Using Programmable I/O and Microprocessor Clock Synchronisation,” 2025. https://doi.org/ 10.5162/SMSI2025/A5.4.","short":"T. Nellius, K. Henne, M. Hartinger, L. Meihost, T. Hetkämper, H. Zeipert, L. Claes, B. Henning, in: 2025."}},{"date_created":"2026-03-11T11:05:08Z","department":[{"_id":"34"},{"_id":"3"},{"_id":"300"}],"type":"research_data","citation":{"ama":"Alptekin M. Entwicklung Einer Augmented Reality Basierten Anwendung Als Vorbereitungsmaßnahme Zum Laborpraktikum in Der Elektrotechnik. LibreCat University; 2025. doi:10.17619/UNIPB/1-2483","bibtex":"@book{Alptekin_2025, title={Entwicklung einer Augmented Reality basierten Anwendung als Vorbereitungsmaßnahme zum Laborpraktikum in der Elektrotechnik}, DOI={10.17619/UNIPB/1-2483}, publisher={LibreCat University}, author={Alptekin, Mesut}, year={2025} }","mla":"Alptekin, Mesut. Entwicklung Einer Augmented Reality Basierten Anwendung Als Vorbereitungsmaßnahme Zum Laborpraktikum in Der Elektrotechnik. LibreCat University, 2025, doi:10.17619/UNIPB/1-2483.","chicago":"Alptekin, Mesut. Entwicklung Einer Augmented Reality Basierten Anwendung Als Vorbereitungsmaßnahme Zum Laborpraktikum in Der Elektrotechnik. LibreCat University, 2025. https://doi.org/10.17619/UNIPB/1-2483.","short":"M. Alptekin, Entwicklung Einer Augmented Reality Basierten Anwendung Als Vorbereitungsmaßnahme Zum Laborpraktikum in Der Elektrotechnik, LibreCat University, 2025.","apa":"Alptekin, M. (2025). Entwicklung einer Augmented Reality basierten Anwendung als Vorbereitungsmaßnahme zum Laborpraktikum in der Elektrotechnik. LibreCat University. https://doi.org/10.17619/UNIPB/1-2483","ieee":"M. Alptekin, Entwicklung einer Augmented Reality basierten Anwendung als Vorbereitungsmaßnahme zum Laborpraktikum in der Elektrotechnik. LibreCat University, 2025."},"abstract":[{"text":"Diese Dissertation behandelt die Entwicklung, Erprobung und Evaluation einer mobilen Augmented Reality Anwendung (mAR-App) namens PEARL (Paderborner Elektrotechnik AR Laborpraktikum), die als Vorbereitungsmaßnahme für elektrotechnische Laborpraktika konzipiert wird. Ziel ist es, Studierenden eine zeitlich und örtlich flexible Möglichkeit zu bieten, den realitätsnahen Umgang mit Laborgeräten - primär dem Oszilloskop - zu erlernen. Die methodische Grundlage bilden der Makrozyklus von Design-Based Research (DBR) als strukturierender Rahmen und das heuristische Modell des Research Pentagons, das die Durchführung auf Mikroebene bestimmt. In insgesamt vier Research Pentagons werden didaktische, technologische, motivationale und evaluative Komponenten systematisch untersucht und weiterentwickelt. Das erste Pentagon fokussiert die Entwicklung eines didaktisch fundierten Konzepts nach dem Prinzip des Constructive Alignment, das Lernziele, Lernaktivitäten und Prüfungsformen in fünf abgestufte Lernlevel überführt. Diese reichen von der initialen Orientierung bis zur eigenständigen Problemlösung in einem freien Experimentiermodus. Im zweiten Research Pentagon wird die technische Machbarkeit von Augmented - und Virtual Reality (VR) im Laborumfeld anhand mehrerer funktionaler Prototypen evaluiert. Während sich VR aufgrund technischer Einschränkungen als ungeeignet erweist, zeigt AR - insbesondere in der markerlosen Ausführung mittels der Software Development Kits (SDKs) ARCore und ARKit - ein hohes Potenzial für den praktischen Einsatz. Im dritten Pentagon entsteht ein Onboarding-Modul, das auf die erste Version der mobilen App (V0.17.01) aufsetzt und grundlegende Funktionen eines realen Oszilloskops digital abbildet. Dabei werden Nutzer:innen schrittweise an das virtuelle Oszilloskop herangeführt und lernen zugleich die zentralen Funktionen der mAR-App kennen. Die Ergebnisse zeigen eine insgesamt neutrale bis leicht positive Nutzungserfahrung, wobei technische Schwächen (z.B. Reaktionszeit oder Objektverankerung) die Effizienz und Steuerbarkeit beeinträchtigen. Im Exkurs-Kapitel erfolgt eine Eye-Tracking-Studie zur Untersuchung visueller Aufmerksamkeit und individueller Lösungsstrategien von Expert:innen und Noviz:innen bei der Arbeit am realen Oszilloskop. Heatmaps und Zeitverläufe in definierten Areas of Interest (AOI) liefern erste Hinweise auf Unterschiede im Blickverhalten zwischen den Gruppen. Die algorithmischen Scanpfadanalysen der Blickverläufe hingegen zeigen eine geringe Trennschärfe. Das Potenzial von Eye-Tracking als Evaluationsmethode wird daher kritisch reflektiert, aber angesichts technologischer Entwicklungen und verfügbarer Eye-Tracker in Mixed Reality (MR) Brillen weiterhin als zukunftsrelevant eingeordnet. Die abschließende summative Evaluation nutzt ein Prä‑Post-Test-Design mit Kontrollgruppenvergleich mit 70 Teilnehmenden, um die Lernwirksamkeit der überarbeiteten mAR-App mit klassischen Materialien wie Videos und Handbüchern zu vergleichen. In der Interventionsgruppe (IG) zeigen sich auf kognitiver und affektiver Ebene signifikant positive Veränderungen: Die Leistungen steigen deutlich, insbesondere in den Taxonomiestufen Anwendung, Verständnis und Analyse; zugleich nehmen experimentelles Selbstkonzept und experimentelles Sachinteresse zu, während Überforderung und Ängstlichkeit im Hinblick auf die Laborpraktika abnehmen. Als Einschränkung zeigt sich, dass die mAR-App keinen klaren Vorsprung gegenüber der Kontrollgruppe (KG) erreicht, was sowohl auf die sehr gut ausgearbeiteten Materialien und Videos der KG als auch auf technische Begrenzungen der mobilen Umsetzung zurückzuführen ist: Kleine Displays, 2D-Oberflächen für 3D-Geräte und unpräzise Touch-Interaktionen erschweren komplexe, feinmotorische Aufgaben. In den begleitenden User Interface (UI) und User Experience (UX) Fragebögen spiegeln sich diese Limitationen in gemischten Bewertungen der App wider. Die Arbeit verdeutlicht, dass die mobile AR-Anwendung trotz technischer Einschränkungen wertvolle Möglichkeiten für die Vorbereitung auf Laborpraktika und das Kennenlernen von Laborgeräten bieten kann. Der Fokus bei der Entwicklung liegt von Beginn an auf einer modularen und flexiblen App-Architektur, um sie mit neuen Geräten und Aufgaben zu erweitern. Der Hauptnutzen liegt perspektivisch nicht in der mobilen Anwendung selbst, sondern in der strategischen Ausrichtung auf zukunftsfähige, skalierbare Lösungen für MR-Brillen. Diese erlauben eine authentische Gestensteuerung und realitätsnahe Interaktionen.","lang":"ger"},{"lang":"eng","text":"This thesis examines the development, testing, and evaluation of a mobile augmented reality application (mAR app), which is designed as a preparation tool for electrical engineering laboratory courses. The aim is to offer students an opportunity to work with laboratory equipment - primarily the oscilloscope - realistically without location and time constraints. The methodological basis is formed by the macrocycle of design-based research (DBR) as a structured framework and the heuristic model of the research pentagon, which specifies the implementation at the micro level. Didactic, technological, motivational, and evaluative components are systematically examined and further developed in a total of four research pentagons. The first pentagon focuses on the development of a didactically sound concept based on the principle of constructive alignment, which incorporates learning objectives, learning activities, and forms of assessment into five graduated learning levels. These range from initial orientation to independent problem-solving in a free experimentation mode. The second phase evaluates the technical feasibility of augmented and virtual reality (VR) in the laboratory environment using several prototypes. While VR turns out to be unsuitable due to technical limitations, AR - especially in the markerless version using the ARCore and ARKit software development kits (SDKs) - shows great potential for everyday use. In the third research pentagon, an onboarding module is created based on the first version of the mobile app (V0.17.01), which digitally maps the basic functions of a real oscilloscope. During this process, users are introduced to the virtual oscilloscope and become familiar with the main functions of the mAR app. The results show an overall neutral to slightly positive user experience, although technical weaknesses (e.g., reaction time and object fixing) negatively impact efficiency and controllability. In the fourth research pentagon, an eye-tracking study is carried out to investigate visual attention and individual solution strategies of expert and novice users when working with real oscilloscopes. Heatmaps and time sequences in defined areas of interest (AOI) provide first indications of differences in gaze behavior between the groups. The algorithmic scan path analysis, on the other hand, reveals a low degree of differentiation. The potential of eye tracking as an evaluation method is therefore critically reflected, but it is still considered to be relevant for future studies in light of technological advancements and the availability of eye trackers in mixed reality (MR) glasses. The final summative evaluation is carried out in the way of a pre-post test design with 70 participants and compares the usage of traditional materials such as videos and manuals with the improved mAR app. In the intervention group (IG), significant improvements emerge on both cognitive and affective levels: performance increases particularly in the areas of application, understanding, and analysis, while experimental self-concept and subject-related interest rise and feelings of overload and anxiety regarding the lab courses decline. As a limitation, the mAR app does not yield a clear advantage over the control group (CG), which can be attributed both to the highly refined materials and videos used in the CG and to technical constraints inherent to the mobile implementation: small displays, 2D interfaces on 3D devices, and imprecise touch interaction limit complex, sensitive motor tasks. These limitations are also reflected in the accompanying user interface (UI) and user experience (UX) questionnaires, which indicate mixed app ratings. Both groups show significant learning gains - particularly in the areas of application, understanding, and analysis. However, a significant advantage of the mAR App cannot be proven. Affective characteristics such as experimental self-concept and general experimental interests increase in both groups, while the feeling of fear before conducting real laboratory work decreases. The app itself achieves average ratings in user interface (UI) and user experience (UX) questionnaires. The thesis demonstrates that, despite technical limitations, the mobile AR application can provide a valuable alternative for preparing students for laboratory courses and familiarizing them with laboratory equipment. From the very beginning, the primary goal during development was a modular and flexible app architecture that can be extended with new devices, tasks, and functions. The main benefit is not in the mobile application itself, but in the strategic direction of future-oriented and scalable solutions for MR glasses, which allow immersive and realistic gesture interactions."}],"publisher":"LibreCat University","_id":"64902","user_id":"14972","doi":"10.17619/UNIPB/1-2483","ddc":["620"],"author":[{"last_name":"Alptekin","first_name":"Mesut","orcid":"0009-0004-8545-1165","full_name":"Alptekin, Mesut","id":"11763"}],"status":"public","title":"Entwicklung einer Augmented Reality basierten Anwendung als Vorbereitungsmaßnahme zum Laborpraktikum in der Elektrotechnik","year":"2025","date_updated":"2026-04-20T07:46:37Z"},{"department":[{"_id":"632"},{"_id":"632"}],"type":"conference","date_created":"2026-04-20T13:09:17Z","citation":{"chicago":"Bäumer, Fabian, Marcus Brinkmann, Maximilian Radoy, Jörg Schwenk, and Juraj Somorovsky. “On the Security of SSH Client Signatures.” In Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security. ACM, 2025. https://doi.org/10.1145/3719027.3765079.","short":"F. Bäumer, M. Brinkmann, M. Radoy, J. Schwenk, J. Somorovsky, in: Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security, ACM, 2025.","apa":"Bäumer, F., Brinkmann, M., Radoy, M., Schwenk, J., & Somorovsky, J. (2025). On the Security of SSH Client Signatures. Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security. https://doi.org/10.1145/3719027.3765079","ieee":"F. Bäumer, M. Brinkmann, M. Radoy, J. Schwenk, and J. Somorovsky, “On the Security of SSH Client Signatures,” 2025, doi: 10.1145/3719027.3765079.","ama":"Bäumer F, Brinkmann M, Radoy M, Schwenk J, Somorovsky J. On the Security of SSH Client Signatures. In: Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security. ACM; 2025. doi:10.1145/3719027.3765079","bibtex":"@inproceedings{Bäumer_Brinkmann_Radoy_Schwenk_Somorovsky_2025, title={On the Security of SSH Client Signatures}, DOI={10.1145/3719027.3765079}, booktitle={Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security}, publisher={ACM}, author={Bäumer, Fabian and Brinkmann, Marcus and Radoy, Maximilian and Schwenk, Jörg and Somorovsky, Juraj}, year={2025} }","mla":"Bäumer, Fabian, et al. “On the Security of SSH Client Signatures.” Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security, ACM, 2025, doi:10.1145/3719027.3765079."},"publication":"Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security","doi":"10.1145/3719027.3765079","user_id":"68826","publisher":"ACM","_id":"65466","date_updated":"2026-04-20T13:09:29Z","publication_status":"published","author":[{"full_name":"Bäumer, Fabian","first_name":"Fabian","last_name":"Bäumer"},{"full_name":"Brinkmann, Marcus","first_name":"Marcus","last_name":"Brinkmann"},{"full_name":"Radoy, Maximilian","first_name":"Maximilian","last_name":"Radoy"},{"last_name":"Schwenk","first_name":"Jörg","full_name":"Schwenk, Jörg"},{"full_name":"Somorovsky, Juraj","last_name":"Somorovsky","first_name":"Juraj"}],"status":"public","title":"On the Security of SSH Client Signatures","year":"2025"},{"date_updated":"2026-04-21T11:51:59Z","author":[{"first_name":"Jeroen","last_name":"Rook","full_name":"Rook, Jeroen","id":"102977"},{"full_name":"López-Ibáñez, Manuel","last_name":"López-Ibáñez","first_name":"Manuel"}],"title":"Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches","year":"2025","status":"public","editor":[{"full_name":"Filipic, Bogdan","first_name":"Bogdan","last_name":"Filipic"}],"doi":"10.1145/3712255.3716537","user_id":"15504","language":[{"iso":"eng"}],"_id":"65474","publisher":"ACM","page":"1617–1642","citation":{"mla":"Rook, Jeroen, and Manuel López-Ibáñez. “Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches.” Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025, edited by Bogdan Filipic, ACM, 2025, pp. 1617–1642, doi:10.1145/3712255.3716537.","bibtex":"@inproceedings{Rook_López-Ibáñez_2025, title={Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches}, DOI={10.1145/3712255.3716537}, booktitle={Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025}, publisher={ACM}, author={Rook, Jeroen and López-Ibáñez, Manuel}, editor={Filipic, Bogdan}, year={2025}, pages={1617–1642} }","ama":"Rook J, López-Ibáñez M. Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches. In: Filipic B, ed. Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025. ACM; 2025:1617–1642. doi:10.1145/3712255.3716537","ieee":"J. Rook and M. López-Ibáñez, “Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches,” in Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025, 2025, pp. 1617–1642, doi: 10.1145/3712255.3716537.","apa":"Rook, J., & López-Ibáñez, M. (2025). Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches. In B. Filipic (Ed.), Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025 (pp. 1617–1642). ACM. https://doi.org/10.1145/3712255.3716537","short":"J. Rook, M. López-Ibáñez, in: B. Filipic (Ed.), Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025, ACM, 2025, pp. 1617–1642.","chicago":"Rook, Jeroen, and Manuel López-Ibáñez. “Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective Approaches.” In Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025, edited by Bogdan Filipic, 1617–1642. ACM, 2025. https://doi.org/10.1145/3712255.3716537."},"publication":"Proceedings of the Genetic and Evolutionary Computation Conference Companion, GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025","department":[{"_id":"819"}],"type":"conference","date_created":"2026-04-21T11:50:48Z"},{"user_id":"13256","doi":"10.1109/PIERS-Spring66516.2025.11276835","_id":"59895","language":[{"iso":"eng"}],"publisher":"PhotonIcs and Electromagnetics Research Symposium (PIERS)","publication_status":"accepted","date_updated":"2026-04-29T14:27:08Z","title":"Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source","status":"public","year":"2025","author":[{"id":"13256","full_name":"Kress, Christian","first_name":"Christian","orcid":"0000-0002-4403-2237","last_name":"Kress"},{"id":"42449","full_name":"Mihaylov, Martin Miroslavov","last_name":"Mihaylov","first_name":"Martin Miroslavov"},{"id":"39217","full_name":"Schwabe, Tobias","last_name":"Schwabe","first_name":"Tobias"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"},{"id":"37144","orcid":"0000-0002-5950-6618 ","first_name":"J. Christoph","last_name":"Scheytt","full_name":"Scheytt, J. Christoph"}],"conference":{"start_date":"2025-05-03","name":"PhotonIcs and Electromagnetics Research Symposium (PIERS)","location":"Abu Dhabi","end_date":"2025-05-09"},"type":"conference","department":[{"_id":"58"},{"_id":"623"}],"date_created":"2025-05-14T09:59:50Z","abstract":[{"text":"The generation of optically broadband Nyquist pulse sequences using an integrated Mach-Zehnder modulator (MZM) in a thin-film lithium-niobate (TFLN) platform with repetition rates of 5 to 32 GHz and optical bandwidths of up to 160 GHz is demonstrated. Nyquist pulse sequences with high optical bandwidth can be used as synchronization and control signals in quantum sources based on photon pair generation.","lang":"eng"}],"project":[{"name":"PONyDAC: SPP 2111 - PONyDAC II - Präziser Optischer Nyquist-Puls-Synthesizer DAC","_id":"302"},{"_id":"175","name":"TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)"}],"publication":"PIERS Proceedings ","citation":{"short":"C. Kress, M.M. Mihaylov, T. Schwabe, C. Silberhorn, J.C. Scheytt, in: PIERS Proceedings , PhotonIcs and Electromagnetics Research Symposium (PIERS), n.d.","chicago":"Kress, Christian, Martin Miroslavov Mihaylov, Tobias Schwabe, Christine Silberhorn, and J. Christoph Scheytt. “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source.” In PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS), n.d. https://doi.org/10.1109/PIERS-Spring66516.2025.11276835.","apa":"Kress, C., Mihaylov, M. M., Schwabe, T., Silberhorn, C., & Scheytt, J. C. (n.d.). Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source. PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS), Abu Dhabi. https://doi.org/10.1109/PIERS-Spring66516.2025.11276835","ieee":"C. Kress, M. M. Mihaylov, T. Schwabe, C. Silberhorn, and J. C. Scheytt, “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source,” presented at the PhotonIcs and Electromagnetics Research Symposium (PIERS), Abu Dhabi, doi: 10.1109/PIERS-Spring66516.2025.11276835.","ama":"Kress C, Mihaylov MM, Schwabe T, Silberhorn C, Scheytt JC. Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source. In: PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS). doi:10.1109/PIERS-Spring66516.2025.11276835","bibtex":"@inproceedings{Kress_Mihaylov_Schwabe_Silberhorn_Scheytt, title={Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source}, DOI={10.1109/PIERS-Spring66516.2025.11276835}, booktitle={PIERS Proceedings }, publisher={PhotonIcs and Electromagnetics Research Symposium (PIERS)}, author={Kress, Christian and Mihaylov, Martin Miroslavov and Schwabe, Tobias and Silberhorn, Christine and Scheytt, J. Christoph} }","mla":"Kress, Christian, et al. “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source.” PIERS Proceedings , PhotonIcs and Electromagnetics Research Symposium (PIERS), doi:10.1109/PIERS-Spring66516.2025.11276835."}},{"date_created":"2025-10-10T13:45:28Z","external_id":{"arxiv":["2510.06796"]},"department":[{"_id":"7"},{"_id":"623"}],"type":"preprint","citation":{"short":"S. Gharibian, J. Kamminga, ArXiv:2510.06796 (2025).","chicago":"Gharibian, Sevag, and Jonas Kamminga. “On the Complexity of Estimating Ground State Entanglement and Free  Energy.” ArXiv:2510.06796, 2025.","ieee":"S. Gharibian and J. Kamminga, “On the complexity of estimating ground state entanglement and free  energy,” arXiv:2510.06796. 2025.","apa":"Gharibian, S., & Kamminga, J. (2025). On the complexity of estimating ground state entanglement and free  energy. In arXiv:2510.06796.","bibtex":"@article{Gharibian_Kamminga_2025, title={On the complexity of estimating ground state entanglement and free  energy}, journal={arXiv:2510.06796}, author={Gharibian, Sevag and Kamminga, Jonas}, year={2025} }","ama":"Gharibian S, Kamminga J. On the complexity of estimating ground state entanglement and free  energy. arXiv:251006796. Published online 2025.","mla":"Gharibian, Sevag, and Jonas Kamminga. “On the Complexity of Estimating Ground State Entanglement and Free  Energy.” ArXiv:2510.06796, 2025."},"publication":"arXiv:2510.06796","abstract":[{"text":"Understanding the entanglement structure of local Hamiltonian ground spaces\r\nis a physically motivated problem, with applications ranging from tensor\r\nnetwork design to quantum error-correcting codes. To this end, we study the\r\ncomplexity of estimating ground state entanglement, and more generally entropy\r\nestimation for low energy states and Gibbs states. We find, in particular, that\r\nthe classes qq-QAM [Kobayashi, le Gall, Nishimura, SICOMP 2019] (a quantum\r\nanalogue of public-coin AM) and QMA(2) (QMA with unentangled proofs) play a\r\ncrucial role for such problems, showing: (1) Detecting a high-entanglement\r\nground state is qq-QAM-complete, (2) computing an additive error approximation\r\nto the Helmholtz free energy (equivalently, a multiplicative error\r\napproximation to the partition function) is in qq-QAM, (3) detecting a\r\nlow-entanglement ground state is QMA(2)-hard, and (4) detecting low energy\r\nstates which are close to product states can range from QMA-complete to\r\nQMA(2)-complete. Our results make progress on an open question of [Bravyi,\r\nChowdhury, Gosset and Wocjan, Nature Physics 2022] on free energy, and yield\r\nthe first QMA(2)-complete Hamiltonian problem using local Hamiltonians (cf. the\r\nsparse QMA(2)-complete Hamiltonian problem of [Chailloux, Sattath, CCC 2012]).","lang":"eng"}],"language":[{"iso":"eng"}],"_id":"61778","user_id":"71541","author":[{"id":"71541","orcid":"0000-0002-9992-3379","last_name":"Gharibian","first_name":"Sevag","full_name":"Gharibian, Sevag"},{"full_name":"Kamminga, Jonas","first_name":"Jonas","last_name":"Kamminga"}],"title":"On the complexity of estimating ground state entanglement and free energy","year":"2025","status":"public","date_updated":"2026-04-30T14:08:44Z"},{"publication":"2025 Forum on Specification & Design Languages (FDL)","citation":{"mla":"Luchterhandt, Lars, et al. “A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids.” 2025 Forum on Specification & Design Languages (FDL), IEEE, 2025, doi:10.1109/fdl68117.2025.11165408.","bibtex":"@inproceedings{Luchterhandt_Govindasamy_Wang_Scheytt_Mueller_Dömer_2025, title={A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids}, DOI={10.1109/fdl68117.2025.11165408}, booktitle={2025 Forum on Specification & Design Languages (FDL)}, publisher={IEEE}, author={Luchterhandt, Lars and Govindasamy, Vivek and Wang, Yutong and Scheytt, Christoph and Mueller, Wolfgang and Dömer, Rainer}, year={2025} }","ama":"Luchterhandt L, Govindasamy V, Wang Y, Scheytt C, Mueller W, Dömer R. A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids. In: 2025 Forum on Specification & Design Languages (FDL). IEEE; 2025. doi:10.1109/fdl68117.2025.11165408","ieee":"L. Luchterhandt, V. Govindasamy, Y. Wang, C. Scheytt, W. Mueller, and R. Dömer, “A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids,” 2025, doi: 10.1109/fdl68117.2025.11165408.","apa":"Luchterhandt, L., Govindasamy, V., Wang, Y., Scheytt, C., Mueller, W., & Dömer, R. (2025). A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids. 2025 Forum on Specification & Design Languages (FDL). https://doi.org/10.1109/fdl68117.2025.11165408","short":"L. Luchterhandt, V. Govindasamy, Y. Wang, C. Scheytt, W. Mueller, R. Dömer, in: 2025 Forum on Specification & Design Languages (FDL), IEEE, 2025.","chicago":"Luchterhandt, Lars, Vivek Govindasamy, Yutong Wang, Christoph Scheytt, Wolfgang Mueller, and Rainer Dömer. “A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids.” In 2025 Forum on Specification & Design Languages (FDL). IEEE, 2025. https://doi.org/10.1109/fdl68117.2025.11165408."},"type":"conference","department":[{"_id":"58"}],"date_created":"2025-11-06T09:47:40Z","date_updated":"2026-05-08T09:12:31Z","publication_status":"published","title":"A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design of RISC-V Processor Grids","year":"2025","status":"public","author":[{"full_name":"Luchterhandt, Lars","last_name":"Luchterhandt","first_name":"Lars"},{"first_name":"Vivek","last_name":"Govindasamy","full_name":"Govindasamy, Vivek"},{"full_name":"Wang, Yutong","last_name":"Wang","first_name":"Yutong"},{"full_name":"Scheytt, Christoph","last_name":"Scheytt","first_name":"Christoph"},{"full_name":"Mueller, Wolfgang","first_name":"Wolfgang","last_name":"Mueller"},{"first_name":"Rainer","last_name":"Dömer","full_name":"Dömer, Rainer"}],"doi":"10.1109/fdl68117.2025.11165408","user_id":"16243","_id":"62108","publisher":"IEEE","language":[{"iso":"eng"}]},{"type":"conference","department":[{"_id":"27"},{"_id":"518"}],"oa":"1","date_created":"2026-05-13T09:44:21Z","publication":"Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies","citation":{"apa":"Bröker, M., Menzel, J., & Plessl, C. (2025). Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations. Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies. https://doi.org/10.1145/3728179.3728187","ieee":"M. Bröker, J. Menzel, and C. Plessl, “Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations,” 2025, doi: 10.1145/3728179.3728187.","chicago":"Bröker, Mika, Johannes Menzel, and Christian Plessl. “Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations.” In Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies. ACM, 2025. https://doi.org/10.1145/3728179.3728187.","short":"M. Bröker, J. Menzel, C. Plessl, in: Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies, ACM, 2025.","mla":"Bröker, Mika, et al. “Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations.” Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies, ACM, 2025, doi:10.1145/3728179.3728187.","ama":"Bröker M, Menzel J, Plessl C. Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations. In: Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies. ACM; 2025. doi:10.1145/3728179.3728187","bibtex":"@inproceedings{Bröker_Menzel_Plessl_2025, title={Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations}, DOI={10.1145/3728179.3728187}, booktitle={Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies}, publisher={ACM}, author={Bröker, Mika and Menzel, Johannes and Plessl, Christian}, year={2025} }"},"user_id":"16153","doi":"10.1145/3728179.3728187","main_file_link":[{"open_access":"1"}],"language":[{"iso":"eng"}],"_id":"65618","publisher":"ACM","publication_status":"published","date_updated":"2026-05-13T09:45:17Z","status":"public","title":"Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations","year":"2025","author":[{"first_name":"Mika","last_name":"Bröker","full_name":"Bröker, Mika"},{"last_name":"Menzel","first_name":"Johannes","full_name":"Menzel, Johannes"},{"id":"16153","last_name":"Plessl","orcid":"0000-0001-5728-9982","first_name":"Christian","full_name":"Plessl, Christian"}]},{"date_created":"2024-01-07T20:09:13Z","type":"conference","department":[{"_id":"7"},{"_id":"623"}],"issue":"85","publication":"16th Innovations in Theoretical Computer Science (ITCS)","abstract":[{"lang":"eng","text":"Despite the fundamental role the Quantum Satisfiability (QSAT) problem has\r\nplayed in quantum complexity theory, a central question remains open: At which\r\nlocal dimension does the complexity of QSAT transition from \"easy\" to \"hard\"?\r\nHere, we study QSAT with each constraint acting on a $k$-dimensional and\r\n$l$-dimensional qudit pair, denoted $(k,l)$-QSAT. Our first main result shows\r\nthat, surprisingly, QSAT on qubits can remain $\\mathsf{QMA}_1$-hard, in that\r\n$(2,5)$-QSAT is $\\mathsf{QMA}_1$-complete. In contrast, $2$-SAT on qubits is\r\nwell-known to be poly-time solvable [Bravyi, 2006]. Our second main result\r\nproves that $(3,d)$-QSAT on the 1D line with $d\\in O(1)$ is also\r\n$\\mathsf{QMA}_1$-hard. Finally, we initiate the study of 1D $(2,d)$-QSAT by\r\ngiving a frustration-free 1D Hamiltonian with a unique, entangled ground state.\r\n Our first result uses a direct embedding, combining a novel clock\r\nconstruction with the 2D circuit-to-Hamiltonian construction of [Gosset, Nagaj,\r\n2013]. Of note is a new simplified and analytic proof for the latter (as\r\nopposed to a partially numeric proof in [GN13]). This exploits Unitary Labelled\r\nGraphs [Bausch, Cubitt, Ozols, 2017] together with a new \"Nullspace Connection\r\nLemma\", allowing us to break low energy analyses into small patches of\r\nprojectors, and to improve the soundness analysis of [GN13] from\r\n$\\Omega(1/T^6)$ to $\\Omega(1/T^2)$, for $T$ the number of gates. Our second\r\nresult goes via black-box reduction: Given an arbitrary 1D Hamiltonian $H$ on\r\n$d'$-dimensional qudits, we show how to embed it into an effective null-space\r\nof a 1D $(3,d)$-QSAT instance, for $d\\in O(1)$. Our approach may be viewed as a\r\nweaker notion of \"simulation\" (\\`a la [Bravyi, Hastings 2017], [Cubitt,\r\nMontanaro, Piddock 2018]). As far as we are aware, this gives the first\r\n\"black-box simulation\"-based $\\mathsf{QMA}_1$-hardness result, i.e. for\r\nfrustration-free Hamiltonians."}],"language":[{"iso":"eng"}],"doi":"10.4230/LIPIcs.ITCS.2025.85","title":"Quantum 2-SAT on low dimensional systems is $\\mathsf{QMA}_1$-complete: Direct embeddings and black-box simulation","year":"2025","author":[{"full_name":"Rudolph, Dorian","last_name":"Rudolph","first_name":"Dorian","id":"57863"},{"full_name":"Gharibian, Sevag","first_name":"Sevag","last_name":"Gharibian","orcid":"0000-0002-9992-3379","id":"71541"},{"full_name":"Nagaj, Daniel","last_name":"Nagaj","first_name":"Daniel"}],"date_updated":"2026-05-15T08:38:31Z","publication_status":"published","intvolume":" 325","external_id":{"arxiv":["2401.02368"]},"citation":{"short":"D. Rudolph, S. Gharibian, D. Nagaj, in: 16th Innovations in Theoretical Computer Science (ITCS), 2025, pp. 1–24.","chicago":"Rudolph, Dorian, Sevag Gharibian, and Daniel Nagaj. “Quantum 2-SAT on Low Dimensional Systems Is $\\mathsf{QMA}_1$-Complete:  Direct Embeddings and Black-Box Simulation.” In 16th Innovations in Theoretical Computer Science (ITCS), 325:1–24, 2025. https://doi.org/10.4230/LIPIcs.ITCS.2025.85.","apa":"Rudolph, D., Gharibian, S., & Nagaj, D. (2025). Quantum 2-SAT on low dimensional systems is $\\mathsf{QMA}_1$-complete:  Direct embeddings and black-box simulation. 16th Innovations in Theoretical Computer Science (ITCS), 325(85), 1–24. https://doi.org/10.4230/LIPIcs.ITCS.2025.85","ieee":"D. Rudolph, S. Gharibian, and D. Nagaj, “Quantum 2-SAT on low dimensional systems is $\\mathsf{QMA}_1$-complete:  Direct embeddings and black-box simulation,” in 16th Innovations in Theoretical Computer Science (ITCS), 2025, vol. 325, no. 85, pp. 1–24, doi: 10.4230/LIPIcs.ITCS.2025.85.","ama":"Rudolph D, Gharibian S, Nagaj D. Quantum 2-SAT on low dimensional systems is $\\mathsf{QMA}_1$-complete:  Direct embeddings and black-box simulation. In: 16th Innovations in Theoretical Computer Science (ITCS). Vol 325. ; 2025:1-24. doi:10.4230/LIPIcs.ITCS.2025.85","bibtex":"@inproceedings{Rudolph_Gharibian_Nagaj_2025, title={Quantum 2-SAT on low dimensional systems is $\\mathsf{QMA}_1$-complete:  Direct embeddings and black-box simulation}, volume={325}, DOI={10.4230/LIPIcs.ITCS.2025.85}, number={85}, booktitle={16th Innovations in Theoretical Computer Science (ITCS)}, author={Rudolph, Dorian and Gharibian, Sevag and Nagaj, Daniel}, year={2025}, pages={1–24} }","mla":"Rudolph, Dorian, et al. “Quantum 2-SAT on Low Dimensional Systems Is $\\mathsf{QMA}_1$-Complete:  Direct Embeddings and Black-Box Simulation.” 16th Innovations in Theoretical Computer Science (ITCS), vol. 325, no. 85, 2025, pp. 1–24, doi:10.4230/LIPIcs.ITCS.2025.85."},"page":"1-24","_id":"50272","user_id":"71541","volume":325,"status":"public"},{"volume":135,"user_id":"71541","doi":"10.1103/29qw-bssx","_id":"55037","language":[{"iso":"eng"}],"page":"030601","intvolume":" 135","publication_status":"published","date_updated":"2026-05-15T08:40:45Z","author":[{"full_name":"Buhrman, Harry","first_name":"Harry","last_name":"Buhrman"},{"full_name":"Gharibian, Sevag","last_name":"Gharibian","orcid":"0000-0002-9992-3379","first_name":"Sevag","id":"71541"},{"full_name":"Landau, Zeph","first_name":"Zeph","last_name":"Landau"},{"full_name":"Gall, François Le","last_name":"Gall","first_name":"François Le"},{"last_name":"Schuch","first_name":"Norbert","full_name":"Schuch, Norbert"},{"last_name":"Tamaki","first_name":"Suguru","full_name":"Tamaki, Suguru"}],"year":"2025","title":"Beating Grover search for low-energy estimation and state preparation","status":"public","department":[{"_id":"7"},{"_id":"623"}],"type":"journal_article","date_created":"2024-07-04T09:02:42Z","external_id":{"arxiv":["2407.03073"]},"abstract":[{"lang":"eng","text":"Estimating ground state energies of many-body Hamiltonians is a central task\r\nin many areas of quantum physics. In this work, we give quantum algorithms\r\nwhich, given any $k$-body Hamiltonian $H$, compute an estimate for the ground\r\nstate energy and prepare a quantum state achieving said energy, respectively.\r\nSpecifically, for any $\\varepsilon>0$, our algorithms return, with high\r\nprobability, an estimate of the ground state energy of $H$ within additive\r\nerror $\\varepsilon M$, or a quantum state with the corresponding energy. Here,\r\n$M$ is the total strength of all interaction terms, which in general is\r\nextensive in the system size. Our approach makes no assumptions about the\r\ngeometry or spatial locality of interaction terms of the input Hamiltonian and\r\nthus handles even long-range or all-to-all interactions, such as in quantum\r\nchemistry, where lattice-based techniques break down. In this fully general\r\nsetting, the runtime of our algorithms scales as $2^{cn/2}$ for $c<1$, yielding\r\nthe first quantum algorithms for low-energy estimation breaking the natural\r\nbound based on Grover search. The core of our approach is remarkably simple,\r\nand relies on showing that any $k$-body Hamiltonian has a low-energy subspace\r\nof exponential dimension."}],"citation":{"ieee":"H. Buhrman, S. Gharibian, Z. Landau, F. L. Gall, N. Schuch, and S. Tamaki, “Beating Grover search for low-energy estimation and state preparation,” Physical Review Letters, vol. 135, p. 030601, 2025, doi: 10.1103/29qw-bssx.","apa":"Buhrman, H., Gharibian, S., Landau, Z., Gall, F. L., Schuch, N., & Tamaki, S. (2025). Beating Grover search for low-energy estimation and state preparation. Physical Review Letters, 135, 030601. https://doi.org/10.1103/29qw-bssx","short":"H. Buhrman, S. Gharibian, Z. Landau, F.L. Gall, N. Schuch, S. Tamaki, Physical Review Letters 135 (2025) 030601.","chicago":"Buhrman, Harry, Sevag Gharibian, Zeph Landau, François Le Gall, Norbert Schuch, and Suguru Tamaki. “Beating Grover Search for Low-Energy Estimation and State Preparation.” Physical Review Letters 135 (2025): 030601. https://doi.org/10.1103/29qw-bssx.","mla":"Buhrman, Harry, et al. “Beating Grover Search for Low-Energy Estimation and State Preparation.” Physical Review Letters, vol. 135, 2025, p. 030601, doi:10.1103/29qw-bssx.","bibtex":"@article{Buhrman_Gharibian_Landau_Gall_Schuch_Tamaki_2025, title={Beating Grover search for low-energy estimation and state preparation}, volume={135}, DOI={10.1103/29qw-bssx}, journal={Physical Review Letters}, author={Buhrman, Harry and Gharibian, Sevag and Landau, Zeph and Gall, François Le and Schuch, Norbert and Tamaki, Suguru}, year={2025}, pages={030601} }","ama":"Buhrman H, Gharibian S, Landau Z, Gall FL, Schuch N, Tamaki S. Beating Grover search for low-energy estimation and state preparation. Physical Review Letters. 2025;135:030601. doi:10.1103/29qw-bssx"},"publication":"Physical Review Letters"},{"abstract":[{"lang":"eng","text":"We investigate the role of energy, i.e. average photon number, as a resource\r\nin the computational complexity of bosonic systems. We show three sets of\r\nresults: (1. Energy growth rates) There exist bosonic gate sets which increase\r\nenergy incredibly rapidly, obtaining e.g. infinite energy in finite/constant\r\ntime. We prove these high energies can make computing properties of bosonic\r\ncomputations, such as deciding whether a given computation will attain infinite\r\nenergy, extremely difficult, formally undecidable. (2. Lower bounds on\r\ncomputational power) More energy ``='' more computational power. For example,\r\ncertain gate sets allow poly-time bosonic computations to simulate PTOWER, the\r\nset of deterministic computations whose runtime scales as a tower of\r\nexponentials with polynomial height. Even just exponential energy and $O(1)$\r\nmodes suffice to simulate NP, which, importantly, is a setup similar to that of\r\nthe recent bosonic factoring algorithm of [Brenner, Caha, Coiteux-Roy and\r\nKoenig (2024)]. For simpler gate sets, we show an energy hierarchy theorem. (3.\r\nUpper bounds on computational power) Bosonic computations with polynomial\r\nenergy can be simulated in BQP, ``physical'' bosonic computations with\r\narbitrary finite energy are decidable, and the gate set consisting of Gaussian\r\ngates and the cubic phase gate can be simulated in PP, with exponential bound\r\non energy, improving upon the previous PSPACE upper bound. Finally, combining\r\nupper and lower bounds yields no-go theorems for a continuous-variable\r\nSolovay--Kitaev theorem for gate sets such as the Gaussian and cubic phase\r\ngates."}],"citation":{"ama":"Chabaud U, Gharibian S, Mehraban S, et al. Energy, Bosons and Computational Complexity. arXiv:251008545. Published online 2025.","bibtex":"@article{Chabaud_Gharibian_Mehraban_Motamedi_Naeij_Rudolph_Sambrani_2025, title={Energy, Bosons and Computational Complexity}, journal={arXiv:2510.08545}, author={Chabaud, Ulysse and Gharibian, Sevag and Mehraban, Saeed and Motamedi, Arsalan and Naeij, Hamid Reza and Rudolph, Dorian and Sambrani, Dhruva}, year={2025} }","mla":"Chabaud, Ulysse, et al. “Energy, Bosons and Computational Complexity.” ArXiv:2510.08545, 2025.","short":"U. Chabaud, S. Gharibian, S. Mehraban, A. Motamedi, H.R. Naeij, D. Rudolph, D. Sambrani, ArXiv:2510.08545 (2025).","chicago":"Chabaud, Ulysse, Sevag Gharibian, Saeed Mehraban, Arsalan Motamedi, Hamid Reza Naeij, Dorian Rudolph, and Dhruva Sambrani. “Energy, Bosons and Computational Complexity.” ArXiv:2510.08545, 2025.","apa":"Chabaud, U., Gharibian, S., Mehraban, S., Motamedi, A., Naeij, H. R., Rudolph, D., & Sambrani, D. (2025). Energy, Bosons and Computational Complexity. In arXiv:2510.08545.","ieee":"U. Chabaud et al., “Energy, Bosons and Computational Complexity,” arXiv:2510.08545. 2025."},"publication":"arXiv:2510.08545","department":[{"_id":"7"},{"_id":"623"}],"type":"preprint","date_created":"2025-10-10T13:44:52Z","external_id":{"arxiv":["2510.08545"]},"date_updated":"2026-05-15T08:39:50Z","author":[{"full_name":"Chabaud, Ulysse","first_name":"Ulysse","last_name":"Chabaud"},{"full_name":"Gharibian, Sevag","last_name":"Gharibian","orcid":"0000-0002-9992-3379","first_name":"Sevag","id":"71541"},{"full_name":"Mehraban, Saeed","first_name":"Saeed","last_name":"Mehraban"},{"full_name":"Motamedi, Arsalan","last_name":"Motamedi","first_name":"Arsalan"},{"full_name":"Naeij, Hamid Reza","last_name":"Naeij","first_name":"Hamid Reza"},{"first_name":"Dorian","last_name":"Rudolph","full_name":"Rudolph, Dorian","id":"57863"},{"first_name":"Dhruva","last_name":"Sambrani","full_name":"Sambrani, Dhruva"}],"year":"2025","status":"public","title":"Energy, Bosons and Computational Complexity","user_id":"71541","_id":"61776","language":[{"iso":"eng"}]},{"user_id":"71541","_id":"60432","language":[{"iso":"eng"}],"date_updated":"2026-05-15T08:41:01Z","author":[{"full_name":"Kremer, Simon-Luca","last_name":"Kremer","first_name":"Simon-Luca"},{"id":"57863","full_name":"Rudolph, Dorian","first_name":"Dorian","last_name":"Rudolph"},{"id":"71541","full_name":"Gharibian, Sevag","orcid":"0000-0002-9992-3379","last_name":"Gharibian","first_name":"Sevag"}],"year":"2025","title":"Quantum k-SAT Related Hypergraph Problems","status":"public","department":[{"_id":"7"},{"_id":"623"}],"type":"preprint","date_created":"2025-06-27T06:56:35Z","external_id":{"arxiv":["2506.17066"]},"abstract":[{"lang":"eng","text":"The Quantum k-SAT problem is the quantum generalization of the k-SAT problem.\r\nIt is the problem whether a given local Hamiltonian is frustration-free.\r\nFrustration-free means that the ground state of the k-local Hamiltonian\r\nminimizes the energy of every local interaction term simultaneously. This is a\r\ncentral question in quantum physics and a canonical QMA_1-complete problem. The\r\nQuantum k-SAT problem is not as well studied as the classical k-SAT problem in\r\nterms of special tractable cases, approximation algorithms and parameterized\r\ncomplexity. In this paper, we will give a graph-theoretic study of the Quantum\r\nk-SAT problem with the structures core and radius. These hypergraph structures\r\nare important to solve the Quantum k-SAT problem. We can solve a Quantum k-SAT\r\ninstance in polynomial time if the derived hypergraph has a core of size n-m+a,\r\nwhere a is a constant, and the radius is at most logarithmic. If it exists, we\r\ncan find a core of size n-m+a with the best possible radius in polynomial time,\r\nwhereas finding a general minimum core with minimal radius is NP-hard."}],"citation":{"apa":"Kremer, S.-L., Rudolph, D., & Gharibian, S. (2025). Quantum k-SAT Related Hypergraph Problems. In arXiv:2506.17066.","ieee":"S.-L. Kremer, D. Rudolph, and S. Gharibian, “Quantum k-SAT Related Hypergraph Problems,” arXiv:2506.17066. 2025.","chicago":"Kremer, Simon-Luca, Dorian Rudolph, and Sevag Gharibian. “Quantum K-SAT Related Hypergraph Problems.” ArXiv:2506.17066, 2025.","short":"S.-L. Kremer, D. Rudolph, S. Gharibian, ArXiv:2506.17066 (2025).","mla":"Kremer, Simon-Luca, et al. “Quantum K-SAT Related Hypergraph Problems.” ArXiv:2506.17066, 2025.","ama":"Kremer S-L, Rudolph D, Gharibian S. Quantum k-SAT Related Hypergraph Problems. arXiv:250617066. Published online 2025.","bibtex":"@article{Kremer_Rudolph_Gharibian_2025, title={Quantum k-SAT Related Hypergraph Problems}, journal={arXiv:2506.17066}, author={Kremer, Simon-Luca and Rudolph, Dorian and Gharibian, Sevag}, year={2025} }"},"publication":"arXiv:2506.17066"},{"keyword":["Faser-Kunststoff-Verbunde (FKV)","Faserverstärkte Kunststoffe (FVK)","Organobleche","Ultraschall"],"type":"journal_article","department":[{"_id":"9"},{"_id":"321"},{"_id":"367"},{"_id":"49"}],"date_created":"2026-01-05T08:42:55Z","project":[{"_id":"157","grant_number":"495847374","name":"FaMOUS: Ein ultraschallbasiertes Messverfahren unter Berücksichtigung viskoelastischer Eigenschaften zur Charakterisierung der Faser-Matrix-Haftung bei Organoblechen sowie deren realitätsnahe Modellierung"}],"publication":"WAK Jahresmagazin","citation":{"ama":"Moritzer E, Brandes P, Westphal MS, et al. Zerstörungsfreie Ultraschall-Prüfung von Organoblechen. WAK Jahresmagazin. 2025;2025:26–29.","bibtex":"@article{Moritzer_Brandes_Westphal_Claes_Wippermann_Düchting_Henning_2025, title={Zerstörungsfreie Ultraschall-Prüfung von Organoblechen}, volume={2025}, journal={WAK Jahresmagazin}, author={Moritzer, Elmar and Brandes, Philipp and Westphal, Max Siegfried and Claes, Leander and Wippermann, Mareen and Düchting, Julia and Henning, Bernd}, year={2025}, pages={26–29} }","mla":"Moritzer, Elmar, et al. “Zerstörungsfreie Ultraschall-Prüfung von Organoblechen.” WAK Jahresmagazin, vol. 2025, 2025, pp. 26–29.","short":"E. Moritzer, P. Brandes, M.S. Westphal, L. Claes, M. Wippermann, J. Düchting, B. Henning, WAK Jahresmagazin 2025 (2025) 26–29.","chicago":"Moritzer, Elmar, Philipp Brandes, Max Siegfried Westphal, Leander Claes, Mareen Wippermann, Julia Düchting, and Bernd Henning. “Zerstörungsfreie Ultraschall-Prüfung von Organoblechen.” WAK Jahresmagazin 2025 (2025): 26–29.","apa":"Moritzer, E., Brandes, P., Westphal, M. S., Claes, L., Wippermann, M., Düchting, J., & Henning, B. (2025). Zerstörungsfreie Ultraschall-Prüfung von Organoblechen. WAK Jahresmagazin, 2025, 26–29.","ieee":"E. Moritzer et al., “Zerstörungsfreie Ultraschall-Prüfung von Organoblechen,” WAK Jahresmagazin, vol. 2025, pp. 26–29, 2025."},"user_id":"11829","volume":2025,"page":"26–29","language":[{"iso":"ger"}],"_id":"63440","date_updated":"2026-05-18T13:20:58Z","intvolume":" 2025","title":"Zerstörungsfreie Ultraschall-Prüfung von Organoblechen","status":"public","year":"2025","author":[{"full_name":"Moritzer, Elmar","last_name":"Moritzer","first_name":"Elmar","id":"20531"},{"full_name":"Brandes, Philipp","first_name":"Philipp","orcid":"0009-0005-9707-0885","last_name":"Brandes","id":"70091"},{"full_name":"Westphal, Max Siegfried","first_name":"Max Siegfried","last_name":"Westphal"},{"id":"11829","full_name":"Claes, Leander","first_name":"Leander","last_name":"Claes","orcid":"0000-0002-4393-268X"},{"last_name":"Wippermann","first_name":"Mareen","full_name":"Wippermann, Mareen","id":"74624"},{"full_name":"Düchting, Julia","last_name":"Düchting","first_name":"Julia"},{"first_name":"Bernd","last_name":"Henning","full_name":"Henning, Bernd","id":"213"}]},{"quality_controlled":"1","publication":"Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch)","citation":{"ieee":"M. Illian, B. Luchterhandt, and L. Wang, “Band Switching for Mobile Energy Optimization in 5G Networks and Beyond,” presented at the ACM Workshop on Mobility in the Evolving Internet Architecture (MobiArch), co-located with ACM MobiCom, Hong Kong, China, 2025, doi: 10.1145/3737897.3767294.","apa":"Illian, M., Luchterhandt, B., & Wang, L. (2025). Band Switching for Mobile Energy Optimization in 5G Networks and Beyond. Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch). ACM Workshop on Mobility in the Evolving Internet Architecture (MobiArch), co-located with ACM MobiCom, Hong Kong, China. https://doi.org/10.1145/3737897.3767294","short":"M. Illian, B. Luchterhandt, L. Wang, in: Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch), 2025.","chicago":"Illian, Marvin, Björn Luchterhandt, and Lin Wang. “Band Switching for Mobile Energy Optimization in 5G Networks and Beyond.” In Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch), 2025. https://doi.org/10.1145/3737897.3767294.","mla":"Illian, Marvin, et al. “Band Switching for Mobile Energy Optimization in 5G Networks and Beyond.” Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch), 2025, doi:10.1145/3737897.3767294.","bibtex":"@inproceedings{Illian_Luchterhandt_Wang_2025, title={Band Switching for Mobile Energy Optimization in 5G Networks and Beyond}, DOI={10.1145/3737897.3767294}, booktitle={Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch)}, author={Illian, Marvin and Luchterhandt, Björn and Wang, Lin}, year={2025} }","ama":"Illian M, Luchterhandt B, Wang L. Band Switching for Mobile Energy Optimization in 5G Networks and Beyond. In: Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch). ; 2025. doi:10.1145/3737897.3767294"},"type":"conference","department":[{"_id":"34"},{"_id":"7"},{"_id":"75"}],"date_created":"2025-09-12T11:22:18Z","date_updated":"2026-05-20T08:46:32Z","title":"Band Switching for Mobile Energy Optimization in 5G Networks and Beyond","status":"public","year":"2025","conference":{"location":"Hong Kong, China","name":"ACM Workshop on Mobility in the Evolving Internet Architecture (MobiArch), co-located with ACM MobiCom","start_date":"2025-11-04","end_date":"2025-11-08"},"author":[{"id":"44169","last_name":"Illian","first_name":"Marvin","orcid":"0009-0007-2992-8346","full_name":"Illian, Marvin"},{"last_name":"Luchterhandt","first_name":"Björn","full_name":"Luchterhandt, Björn"},{"id":"102868","full_name":"Wang, Lin","first_name":"Lin","last_name":"Wang","orcid":"0000-0001-7181-6128"}],"doi":"10.1145/3737897.3767294","user_id":"44169","_id":"61256","language":[{"iso":"eng"}]}]