---
_id: '62981'
abstract:
- lang: eng
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. "
author:
- first_name: Sadaf
full_name: Ehtesabi, Sadaf
id: '116116'
last_name: Ehtesabi
- first_name: Manoar
full_name: Hossain, Manoar
id: '114619'
last_name: Hossain
orcid: https://orcid.org/0000-0002-0737-7981
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Andreas
full_name: Krawinkel, Andreas
id: '15275'
last_name: Krawinkel
- first_name: Lukas
full_name: Ostermann, Lukas
id: '69976'
last_name: Ostermann
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
- first_name: Heinrich
full_name: Riebler, Heinrich
id: '8961'
last_name: Riebler
- first_name: Stefan
full_name: Rohde, Stefan
id: '34009'
last_name: Rohde
- first_name: Robert
full_name: Schade, Robert
id: '75963'
last_name: Schade
orcid: 0000-0002-6268-5397
- first_name: Michael
full_name: Schwarz, Michael
id: '5312'
last_name: Schwarz
- first_name: Jens
full_name: Simon, Jens
id: '15273'
last_name: Simon
- first_name: Nils
full_name: Winnwa, Nils
id: '61189'
last_name: Winnwa
- first_name: Alex
full_name: Wiens, Alex
id: '23522'
last_name: Wiens
orcid: 0000-0003-1764-9773
- first_name: Xin
full_name: Wu, Xin
id: '77439'
last_name: Wu
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
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
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} }'
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.'
ieee: 'S. Ehtesabi et al., Otus Supercomputer, vol. 1. Paderborn:
Paderborn Center for Parallel Computing (PC2), 2025.'
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.
date_created: 2025-12-09T09:11:04Z
date_updated: 2026-03-25T11:50:31Z
ddc:
- '004'
department:
- _id: '27'
- _id: '518'
doi: 10.48550/ARXIV.2512.07401
file:
- access_level: open_access
content_type: application/pdf
creator: deffel
date_created: 2025-12-09T09:19:12Z
date_updated: 2026-03-25T11:50:30Z
file_id: '62982'
file_name: 2512.07401v1.pdf
file_size: 4535595
relation: main_file
file_date_updated: 2026-03-25T11:50:30Z
has_accepted_license: '1'
intvolume: ' 1'
keyword:
- Otus
- Supercomputer
- FPGA
- PC2
- Paderborn Center for Parallel Computing
- Noctua 2
- HPC
language:
- iso: eng
oa: '1'
page: '33'
place: Paderborn
publication_status: published
publisher: Paderborn Center for Parallel Computing (PC2)
report_number: PC2TR-2025-1
series_title: PC2 Technical Report Series
status: public
title: Otus Supercomputer
type: report
user_id: '23522'
volume: 1
year: '2025'
...
---
_id: '56131'
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. '
article_type: original
author:
- first_name: Max
full_name: Hoffmann, Max
id: '32202'
last_name: Hoffmann
orcid: 0000-0002-6964-7123
citation:
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
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
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} }'
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.'
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.'
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.
short: M. Hoffmann, Recherches En Didactique Des Mathématiques 45 (2025) 85–120.
date_created: 2024-09-14T08:08:22Z
date_updated: 2026-03-30T13:52:29Z
department:
- _id: '97'
- _id: '643'
doi: 10.46298/rdm.14256
intvolume: ' 45'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://rdm.episciences.org/17761/pdf
oa: '1'
page: 85-120
publication: Recherches en Didactique des Mathématiques
publication_status: published
quality_controlled: '1'
status: public
title: Symmetry as a Topic for the University Education of Pre-Service Teachers
type: journal_article
user_id: '32202'
volume: 45
year: '2025'
...
---
_id: '65246'
author:
- first_name: Max
full_name: Hoffmann, Max
last_name: Hoffmann
citation:
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.'
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.'
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.'
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.'
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.'
date_created: 2026-03-30T14:57:31Z
date_updated: 2026-03-30T15:03:09Z
department:
- _id: '97'
- _id: '643'
editor:
- first_name: Marianna
full_name: Bosch, Marianna
last_name: Bosch
- first_name: Giorgio
full_name: Bolondi, Giorgio
last_name: Bolondi
- first_name: Susana
full_name: Carreira, Susana
last_name: Carreira
- first_name: Michael
full_name: Gaidoschik, Michael
last_name: Gaidoschik
- first_name: Camilla
full_name: Spagnolo, Camilla
last_name: Spagnolo
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.science/CERME14/hal-05237875v1
oa: '1'
page: 2245-2252
publication: Proceedings of the Fourteenth Congress of the European Society for Research
in Mathematics Education (CERME14)
publication_status: published
publisher: Free University of Bozen-Bolzano and ERME
quality_controlled: '1'
status: public
title: 'Using scriptwriting as a response format for interface tasks: Exemplary analyses
in the context of symmetry'
type: conference
user_id: '32202'
year: '2025'
...
---
_id: '63441'
author:
- first_name: Elmar
full_name: Moritzer, Elmar
id: '20531'
last_name: Moritzer
- first_name: Philipp
full_name: Brandes, Philipp
id: '70091'
last_name: Brandes
orcid: 0009-0005-9707-0885
- first_name: Maurice
full_name: Wittler, Maurice
id: '76071'
last_name: Wittler
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Mareen
full_name: Wippermann, Mareen
id: '74624'
last_name: Wippermann
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
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.'
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.
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} }'
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.
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.
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.
short: 'E. Moritzer, P. Brandes, M. Wittler, L. Claes, M. Wippermann, B. Henning,
in: 40th International Conference of the Polymer Processing Society, 2025.'
date_created: 2026-01-05T08:42:55Z
date_updated: 2026-03-30T14:20:00Z
department:
- _id: '9'
- _id: '321'
- _id: '367'
- _id: '49'
keyword:
- Faser-Kunststoff-Verbunde (FKV)
- Faserverstärkte Kunststoffe (FVK)
- Organobleche
- Ultraschall
language:
- iso: eng
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: 40th International Conference of the Polymer Processing Society
status: public
title: Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced
thermoplastic composite laminates using ultrasound
type: conference
user_id: '59363'
year: '2025'
...
---
_id: '59896'
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.
author:
- first_name: Christian
full_name: Kress, Christian
id: '13256'
last_name: Kress
orcid: 0000-0002-4403-2237
- first_name: Tobias
full_name: Schwabe, Tobias
id: '39217'
last_name: Schwabe
- first_name: Martin Miroslavov
full_name: Mihaylov, Martin Miroslavov
id: '42449'
last_name: Mihaylov
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
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 .
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.'
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} }'
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.
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.'
mla: Kress, Christian, et al. High-Speed Mach-Zehnder Modulator with Linear Segmented
On-Chip Drivers in Photonic 45nm SOI-CMOS Technology .
short: 'C. Kress, T. Schwabe, M.M. Mihaylov, J.C. Scheytt, in: n.d.'
conference:
end_date: 2025-05-09
location: Long Beach, CA, USA
name: 'CLEO: Conference on Lasers and Electro-Optics'
start_date: 2025-05-04
date_created: 2025-05-14T11:08:07Z
date_updated: 2026-03-31T09:06:49Z
department:
- _id: '58'
- _id: '623'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://ieeexplore.ieee.org/document/11190539
oa: '1'
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'
publication_status: accepted
status: public
title: 'High-Speed Mach-Zehnder Modulator with Linear Segmented On-Chip Drivers in
Photonic 45nm SOI-CMOS Technology '
type: conference
user_id: '13256'
year: '2025'
...
---
_id: '53413'
abstract:
- lang: eng
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."
article_type: original
author:
- first_name: Benjamin
full_name: Delarue, Benjamin
id: '70575'
last_name: Delarue
- first_name: Joachim
full_name: Hilgert, Joachim
id: '220'
last_name: Hilgert
citation:
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.
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.
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}
}'
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.'
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.
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.
short: B. Delarue, J. Hilgert, Journal of Lie Theory 35 (n.d.) 787--804.
date_created: 2024-04-11T12:31:18Z
date_updated: 2026-03-31T09:07:17Z
department:
- _id: '548'
intvolume: ' 35'
issue: (4)
language:
- iso: eng
page: 787--804
publication: Journal of Lie Theory
publication_identifier:
issn:
- 0949-5932
publication_status: inpress
status: public
title: Quantum resonances and scattering poles of classical rank one locally symmetric
spaces
type: journal_article
user_id: '220'
volume: 35
year: '2025'
...
---
_id: '60504'
author:
- first_name: Tom
full_name: Nellius, Tom
last_name: Nellius
- first_name: Kevin
full_name: Henne, Kevin
id: '56918'
last_name: Henne
- first_name: Maximilian
full_name: Hartinger, Maximilian
last_name: Hartinger
- first_name: Lars
full_name: Meihost, Lars
id: '24769'
last_name: Meihost
- first_name: Tim
full_name: Hetkämper, Tim
id: '38123'
last_name: Hetkämper
- first_name: Henning
full_name: Zeipert, Henning
id: '32580'
last_name: Zeipert
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
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'
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
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} }'
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.
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.'
mla: Nellius, Tom, et al. Ultrasonic Phased Array Interface Using Programmable
I/O and Microprocessor Clock Synchronisation. 2025, doi: 10.5162/SMSI2025/A5.4.
short: 'T. Nellius, K. Henne, M. Hartinger, L. Meihost, T. Hetkämper, H. Zeipert,
L. Claes, B. Henning, in: 2025.'
conference:
end_date: 2025-05-08
location: Nürnberg
name: SMSI 2025
start_date: 2025-05-06
date_created: 2025-07-03T07:17:54Z
date_updated: 2026-04-08T08:51:39Z
department:
- _id: '49'
doi: ' 10.5162/SMSI2025/A5.4'
language:
- iso: eng
status: public
title: Ultrasonic phased array interface using programmable I/O and microprocessor
clock synchronisation
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '64902'
abstract:
- lang: ger
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: 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.'
author:
- first_name: Mesut
full_name: Alptekin, Mesut
id: '11763'
last_name: Alptekin
orcid: 0009-0004-8545-1165
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
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
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} }'
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.
ieee: M. Alptekin, Entwicklung einer Augmented Reality basierten Anwendung als
Vorbereitungsmaßnahme zum Laborpraktikum in der Elektrotechnik. LibreCat University,
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.
short: M. Alptekin, Entwicklung Einer Augmented Reality Basierten Anwendung Als
Vorbereitungsmaßnahme Zum Laborpraktikum in Der Elektrotechnik, LibreCat University,
2025.
date_created: 2026-03-11T11:05:08Z
date_updated: 2026-04-20T07:46:37Z
ddc:
- '620'
department:
- _id: '34'
- _id: '3'
- _id: '300'
doi: 10.17619/UNIPB/1-2483
publisher: LibreCat University
status: public
title: Entwicklung einer Augmented Reality basierten Anwendung als Vorbereitungsmaßnahme
zum Laborpraktikum in der Elektrotechnik
type: research_data
user_id: '14972'
year: '2025'
...
---
_id: '65466'
author:
- first_name: Fabian
full_name: Bäumer, Fabian
last_name: Bäumer
- first_name: Marcus
full_name: Brinkmann, Marcus
last_name: Brinkmann
- first_name: Maximilian
full_name: Radoy, Maximilian
last_name: Radoy
- first_name: Jörg
full_name: Schwenk, Jörg
last_name: Schwenk
- first_name: Juraj
full_name: Somorovsky, Juraj
last_name: Somorovsky
citation:
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'
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
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} }'
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.
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.'
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.
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.'
date_created: 2026-04-20T13:09:17Z
date_updated: 2026-04-20T13:09:29Z
department:
- _id: '632'
- _id: '632'
doi: 10.1145/3719027.3765079
publication: Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications
Security
publication_status: published
publisher: ACM
status: public
title: On the Security of SSH Client Signatures
type: conference
user_id: '68826'
year: '2025'
...
---
_id: '65474'
author:
- first_name: Jeroen
full_name: Rook, Jeroen
id: '102977'
last_name: Rook
- first_name: Manuel
full_name: López-Ibáñez, Manuel
last_name: López-Ibáñez
citation:
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'
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'
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} }'
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.'
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.'
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.'
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.'
date_created: 2026-04-21T11:50:48Z
date_updated: 2026-04-21T11:51:59Z
department:
- _id: '819'
doi: 10.1145/3712255.3716537
editor:
- first_name: Bogdan
full_name: Filipic, Bogdan
last_name: Filipic
language:
- iso: eng
page: 1617–1642
publication: Proceedings of the Genetic and Evolutionary Computation Conference Companion,
GECCO 2025, NH Malaga Hotel, Malaga, Spain, July 14-18, 2025
publisher: ACM
status: public
title: 'Advanced Use of Automatic Algorithm Configuration: Single- and Multi-Objective
Approaches'
type: conference
user_id: '15504'
year: '2025'
...
---
_id: '59895'
abstract:
- lang: eng
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.
author:
- first_name: Christian
full_name: Kress, Christian
id: '13256'
last_name: Kress
orcid: 0000-0002-4403-2237
- first_name: Martin Miroslavov
full_name: Mihaylov, Martin Miroslavov
id: '42449'
last_name: Mihaylov
- first_name: Tobias
full_name: Schwabe, Tobias
id: '39217'
last_name: Schwabe
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
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'
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
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} }'
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.
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.'
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.
short: 'C. Kress, M.M. Mihaylov, T. Schwabe, C. Silberhorn, J.C. Scheytt, in: PIERS
Proceedings , PhotonIcs and Electromagnetics Research Symposium (PIERS), n.d.'
conference:
end_date: 2025-05-09
location: Abu Dhabi
name: PhotonIcs and Electromagnetics Research Symposium (PIERS)
start_date: 2025-05-03
date_created: 2025-05-14T09:59:50Z
date_updated: 2026-04-29T14:27:08Z
department:
- _id: '58'
- _id: '623'
doi: 10.1109/PIERS-Spring66516.2025.11276835
language:
- iso: eng
project:
- _id: '302'
name: 'PONyDAC: SPP 2111 - PONyDAC II - Präziser Optischer Nyquist-Puls-Synthesizer
DAC'
- _id: '175'
name: 'TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen
Modulatoren auf Basis von CMOS und LNOI (C11*)'
publication: 'PIERS Proceedings '
publication_status: accepted
publisher: PhotonIcs and Electromagnetics Research Symposium (PIERS)
status: public
title: Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum
Source
type: conference
user_id: '13256'
year: '2025'
...
---
_id: '61778'
abstract:
- lang: eng
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])."
author:
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Jonas
full_name: Kamminga, Jonas
last_name: Kamminga
citation:
ama: Gharibian S, Kamminga J. On the complexity of estimating ground state entanglement
and free energy. arXiv:251006796. Published online 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} }'
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.
mla: Gharibian, Sevag, and Jonas Kamminga. “On the Complexity of Estimating Ground
State Entanglement and Free Energy.” ArXiv:2510.06796, 2025.
short: S. Gharibian, J. Kamminga, ArXiv:2510.06796 (2025).
date_created: 2025-10-10T13:45:28Z
date_updated: 2026-04-30T14:08:44Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2510.06796'
language:
- iso: eng
publication: arXiv:2510.06796
status: public
title: On the complexity of estimating ground state entanglement and free energy
type: preprint
user_id: '71541'
year: '2025'
...
---
_id: '62108'
author:
- first_name: Lars
full_name: Luchterhandt, Lars
last_name: Luchterhandt
- first_name: Vivek
full_name: Govindasamy, Vivek
last_name: Govindasamy
- first_name: Yutong
full_name: Wang, Yutong
last_name: Wang
- first_name: Christoph
full_name: Scheytt, Christoph
last_name: Scheytt
- first_name: Wolfgang
full_name: Mueller, Wolfgang
last_name: Mueller
- first_name: Rainer
full_name: Dömer, Rainer
last_name: Dömer
citation:
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'
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
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} }'
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.
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.'
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.
short: 'L. Luchterhandt, V. Govindasamy, Y. Wang, C. Scheytt, W. Mueller, R. Dömer,
in: 2025 Forum on Specification & Design Languages (FDL), IEEE, 2025.'
date_created: 2025-11-06T09:47:40Z
date_updated: 2026-05-08T09:12:31Z
department:
- _id: '58'
doi: 10.1109/fdl68117.2025.11165408
language:
- iso: eng
publication: 2025 Forum on Specification & Design Languages (FDL)
publication_status: published
publisher: IEEE
status: public
title: A Quantitative Guide to Navigate Speed/Accuracy Tradeoffs in System Level Design
of RISC-V Processor Grids
type: conference
user_id: '16243'
year: '2025'
...
---
_id: '65618'
author:
- first_name: Mika
full_name: Bröker, Mika
last_name: Bröker
- first_name: Johannes
full_name: Menzel, Johannes
last_name: Menzel
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
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'
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
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} }'
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.
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.'
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.
short: 'M. Bröker, J. Menzel, C. Plessl, in: Proceedings of the 15th International
Symposium on Highly Efficient Accelerators and Reconfigurable Technologies, ACM,
2025.'
date_created: 2026-05-13T09:44:21Z
date_updated: 2026-05-13T09:45:17Z
department:
- _id: '27'
- _id: '518'
doi: 10.1145/3728179.3728187
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: Proceedings of the 15th International Symposium on Highly Efficient Accelerators
and Reconfigurable Technologies
publication_status: published
publisher: ACM
status: public
title: Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics
Simulations
type: conference
user_id: '16153'
year: '2025'
...
---
_id: '50272'
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."
author:
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Daniel
full_name: Nagaj, Daniel
last_name: Nagaj
citation:
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'
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
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} }'
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.
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.'
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.
short: 'D. Rudolph, S. Gharibian, D. Nagaj, in: 16th Innovations in Theoretical
Computer Science (ITCS), 2025, pp. 1–24.'
date_created: 2024-01-07T20:09:13Z
date_updated: 2026-05-15T08:38:31Z
department:
- _id: '7'
- _id: '623'
doi: 10.4230/LIPIcs.ITCS.2025.85
external_id:
arxiv:
- '2401.02368'
intvolume: ' 325'
issue: '85'
language:
- iso: eng
page: 1-24
publication: 16th Innovations in Theoretical Computer Science (ITCS)
publication_status: published
status: public
title: 'Quantum 2-SAT on low dimensional systems is $\mathsf{QMA}_1$-complete: Direct
embeddings and black-box simulation'
type: conference
user_id: '71541'
volume: 325
year: '2025'
...
---
_id: '55037'
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."
author:
- first_name: Harry
full_name: Buhrman, Harry
last_name: Buhrman
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Zeph
full_name: Landau, Zeph
last_name: Landau
- first_name: François Le
full_name: Gall, François Le
last_name: Gall
- first_name: Norbert
full_name: Schuch, Norbert
last_name: Schuch
- first_name: Suguru
full_name: Tamaki, Suguru
last_name: Tamaki
citation:
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
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
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}
}'
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.'
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.'
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.
short: H. Buhrman, S. Gharibian, Z. Landau, F.L. Gall, N. Schuch, S. Tamaki, Physical
Review Letters 135 (2025) 030601.
date_created: 2024-07-04T09:02:42Z
date_updated: 2026-05-15T08:40:45Z
department:
- _id: '7'
- _id: '623'
doi: 10.1103/29qw-bssx
external_id:
arxiv:
- '2407.03073'
intvolume: ' 135'
language:
- iso: eng
page: '030601'
publication: Physical Review Letters
publication_status: published
status: public
title: Beating Grover search for low-energy estimation and state preparation
type: journal_article
user_id: '71541'
volume: 135
year: '2025'
...
---
_id: '61776'
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."
author:
- first_name: Ulysse
full_name: Chabaud, Ulysse
last_name: Chabaud
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Saeed
full_name: Mehraban, Saeed
last_name: Mehraban
- first_name: Arsalan
full_name: Motamedi, Arsalan
last_name: Motamedi
- first_name: Hamid Reza
full_name: Naeij, Hamid Reza
last_name: Naeij
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
- first_name: Dhruva
full_name: Sambrani, Dhruva
last_name: Sambrani
citation:
ama: Chabaud U, Gharibian S, Mehraban S, et al. Energy, Bosons and Computational
Complexity. arXiv:251008545. Published online 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.
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}
}'
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.
ieee: U. Chabaud et al., “Energy, Bosons and Computational Complexity,” arXiv:2510.08545.
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).
date_created: 2025-10-10T13:44:52Z
date_updated: 2026-05-15T08:39:50Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2510.08545'
language:
- iso: eng
publication: arXiv:2510.08545
status: public
title: Energy, Bosons and Computational Complexity
type: preprint
user_id: '71541'
year: '2025'
...
---
_id: '60432'
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."
author:
- first_name: Simon-Luca
full_name: Kremer, Simon-Luca
last_name: Kremer
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
citation:
ama: Kremer S-L, Rudolph D, Gharibian S. Quantum k-SAT Related Hypergraph Problems.
arXiv:250617066. Published online 2025.
apa: Kremer, S.-L., Rudolph, D., & Gharibian, S. (2025). Quantum k-SAT Related
Hypergraph Problems. In arXiv:2506.17066.
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} }'
chicago: Kremer, Simon-Luca, Dorian Rudolph, and Sevag Gharibian. “Quantum K-SAT
Related Hypergraph Problems.” ArXiv:2506.17066, 2025.
ieee: S.-L. Kremer, D. Rudolph, and S. Gharibian, “Quantum k-SAT Related Hypergraph
Problems,” arXiv:2506.17066. 2025.
mla: Kremer, Simon-Luca, et al. “Quantum K-SAT Related Hypergraph Problems.” ArXiv:2506.17066,
2025.
short: S.-L. Kremer, D. Rudolph, S. Gharibian, ArXiv:2506.17066 (2025).
date_created: 2025-06-27T06:56:35Z
date_updated: 2026-05-15T08:41:01Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2506.17066'
language:
- iso: eng
publication: arXiv:2506.17066
status: public
title: Quantum k-SAT Related Hypergraph Problems
type: preprint
user_id: '71541'
year: '2025'
...
---
_id: '63440'
author:
- first_name: Elmar
full_name: Moritzer, Elmar
id: '20531'
last_name: Moritzer
- first_name: Philipp
full_name: Brandes, Philipp
id: '70091'
last_name: Brandes
orcid: 0009-0005-9707-0885
- first_name: Max Siegfried
full_name: Westphal, Max Siegfried
last_name: Westphal
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Mareen
full_name: Wippermann, Mareen
id: '74624'
last_name: Wippermann
- first_name: Julia
full_name: Düchting, Julia
last_name: Düchting
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Moritzer E, Brandes P, Westphal MS, et al. 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.
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} }'
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.'
ieee: E. Moritzer et al., “Zerstörungsfreie Ultraschall-Prüfung von Organoblechen,”
WAK Jahresmagazin, vol. 2025, pp. 26–29, 2025.
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.
date_created: 2026-01-05T08:42:55Z
date_updated: 2026-05-18T13:20:58Z
department:
- _id: '9'
- _id: '321'
- _id: '367'
- _id: '49'
intvolume: ' 2025'
keyword:
- Faser-Kunststoff-Verbunde (FKV)
- Faserverstärkte Kunststoffe (FVK)
- Organobleche
- Ultraschall
language:
- iso: ger
page: 26–29
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
status: public
title: Zerstörungsfreie Ultraschall-Prüfung von Organoblechen
type: journal_article
user_id: '11829'
volume: 2025
year: '2025'
...
---
_id: '61256'
author:
- first_name: Marvin
full_name: Illian, Marvin
id: '44169'
last_name: Illian
orcid: 0009-0007-2992-8346
- first_name: Björn
full_name: Luchterhandt, Björn
last_name: Luchterhandt
- first_name: Lin
full_name: Wang, Lin
id: '102868'
last_name: Wang
orcid: 0000-0001-7181-6128
citation:
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'
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
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} }'
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.
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.'
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.
short: 'M. Illian, B. Luchterhandt, L. Wang, in: Proceedings of the 20th Workshop
on Mobility in the Evolving Internet Architecture (MobiArch), 2025.'
conference:
end_date: 2025-11-08
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
date_created: 2025-09-12T11:22:18Z
date_updated: 2026-05-20T08:46:32Z
department:
- _id: '34'
- _id: '7'
- _id: '75'
doi: 10.1145/3737897.3767294
language:
- iso: eng
publication: Proceedings of the 20th Workshop on Mobility in the Evolving Internet
Architecture (MobiArch)
quality_controlled: '1'
status: public
title: Band Switching for Mobile Energy Optimization in 5G Networks and Beyond
type: conference
user_id: '44169'
year: '2025'
...