---
_id: '46469'
abstract:
- lang: eng
text: 'We show how to learn discrete field theories from observational data of fields
on a space-time lattice. For this, we train a neural network model of a discrete
Lagrangian density such that the discrete Euler--Lagrange equations are consistent
with the given training data. We, thus, obtain a structure-preserving machine
learning architecture. Lagrangian densities are not uniquely defined by the solutions
of a field theory. We introduce a technique to derive regularisers for the training
process which optimise numerical regularity of the discrete field theory. Minimisation
of the regularisers guarantees that close to the training data the discrete field
theory behaves robust and efficient when used in numerical simulations. Further,
we show how to identify structurally simple solutions of the underlying continuous
field theory such as travelling waves. This is possible even when travelling waves
are not present in the training data. This is compared to data-driven model order
reduction based approaches, which struggle to identify suitable latent spaces
containing structurally simple solutions when these are not present in the training
data. Ideas are demonstrated on examples based on the wave equation and the Schrödinger
equation. '
article_number: '013104'
article_type: original
author:
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
citation:
ama: Offen C, Ober-Blöbaum S. Learning of discrete models of variational PDEs from
data. Chaos. 2024;34(1). doi:10.1063/5.0172287
apa: Offen, C., & Ober-Blöbaum, S. (2024). Learning of discrete models of variational
PDEs from data. Chaos, 34(1), Article 013104. https://doi.org/10.1063/5.0172287
bibtex: '@article{Offen_Ober-Blöbaum_2024, title={Learning of discrete models of
variational PDEs from data}, volume={34}, DOI={10.1063/5.0172287},
number={1013104}, journal={Chaos}, publisher={AIP Publishing}, author={Offen,
Christian and Ober-Blöbaum, Sina}, year={2024} }'
chicago: Offen, Christian, and Sina Ober-Blöbaum. “Learning of Discrete Models of
Variational PDEs from Data.” Chaos 34, no. 1 (2024). https://doi.org/10.1063/5.0172287.
ieee: 'C. Offen and S. Ober-Blöbaum, “Learning of discrete models of variational
PDEs from data,” Chaos, vol. 34, no. 1, Art. no. 013104, 2024, doi: 10.1063/5.0172287.'
mla: Offen, Christian, and Sina Ober-Blöbaum. “Learning of Discrete Models of Variational
PDEs from Data.” Chaos, vol. 34, no. 1, 013104, AIP Publishing, 2024, doi:10.1063/5.0172287.
short: C. Offen, S. Ober-Blöbaum, Chaos 34 (2024).
date_created: 2023-08-10T08:24:48Z
date_updated: 2024-08-12T13:45:43Z
ddc:
- '510'
department:
- _id: '636'
doi: 10.1063/5.0172287
external_id:
arxiv:
- '2308.05082 '
file:
- access_level: open_access
content_type: application/pdf
creator: coffen
date_created: 2024-01-09T10:48:38Z
date_updated: 2024-01-09T10:48:38Z
file_id: '50376'
file_name: Accepted manuscript with AIP banner CHA23-AR-01370.pdf
file_size: 13222105
relation: main_file
title: Accepted Manuscript Chaos
- access_level: open_access
content_type: application/pdf
creator: coffen
date_created: 2024-01-09T11:19:49Z
date_updated: 2024-01-09T11:19:49Z
description: |-
We show how to learn discrete field theories from observational data of fields on a space-time lattice. For this, we train
a neural network model of a discrete Lagrangian density such that the discrete Euler–Lagrange equations are consistent
with the given training data. We, thus, obtain a structure-preserving machine learning architecture. Lagrangian
densities are not uniquely defined by the solutions of a field theory. We introduce a technique to derive regularisers for
the training process which optimise numerical regularity of the discrete field theory. Minimisation of the regularisers
guarantees that close to the training data the discrete field theory behaves robust and efficient when used in numerical
simulations. Further, we show how to identify structurally simple solutions of the underlying continuous field theory
such as travelling waves. This is possible even when travelling waves are not present in the training data. This is
compared to data-driven model order reduction based approaches, which struggle to identify suitable latent spaces
containing structurally simple solutions when these are not present in the training data. Ideas are demonstrated on
examples based on the wave equation and the Schrödinger equation.
file_id: '50390'
file_name: LDensityPDE_AIP.pdf
file_size: 12960884
relation: main_file
title: Learning of discrete models of variational PDEs from data
file_date_updated: 2024-01-09T11:19:49Z
has_accepted_license: '1'
intvolume: ' 34'
issue: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Chaos
publication_identifier:
issn:
- 1054-1500
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
related_material:
link:
- description: GitHub
relation: software
url: https://github.com/Christian-Offen/DLNN_pde
status: public
title: Learning of discrete models of variational PDEs from data
type: journal_article
user_id: '85279'
volume: 34
year: '2024'
...
---
_id: '55159'
abstract:
- lang: eng
text: "We introduce a method based on Gaussian process regression to identify discrete
variational principles from observed solutions of a field theory. The method is
based on the data-based identification of a discrete Lagrangian density. It is
a geometric machine learning technique in the sense that the variational structure
of the true field theory is reflected in the data-driven model by design. We provide
a rigorous convergence statement of the method. The proof circumvents challenges
posed by the ambiguity of discrete Lagrangian densities in the inverse problem
of variational calculus.\r\nMoreover, our method can be used to quantify model
uncertainty in the equations of motions and any linear observable of the discrete
field theory. This is illustrated on the example of the discrete wave equation
and Schrödinger equation.\r\nThe article constitutes an extension of our previous
article arXiv:2404.19626 for the data-driven identification of (discrete) Lagrangians
for variational dynamics from an ode setting to the setting of discrete pdes."
author:
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
citation:
ama: Offen C. Machine learning of discrete field theories with guaranteed convergence
and uncertainty quantification.
apa: Offen, C. (n.d.). Machine learning of discrete field theories with guaranteed
convergence and uncertainty quantification.
bibtex: '@article{Offen, title={Machine learning of discrete field theories with
guaranteed convergence and uncertainty quantification}, author={Offen, Christian}
}'
chicago: Offen, Christian. “Machine Learning of Discrete Field Theories with Guaranteed
Convergence and Uncertainty Quantification,” n.d.
ieee: C. Offen, “Machine learning of discrete field theories with guaranteed convergence
and uncertainty quantification.” .
mla: Offen, Christian. Machine Learning of Discrete Field Theories with Guaranteed
Convergence and Uncertainty Quantification.
short: C. Offen, (n.d.).
date_created: 2024-07-10T13:43:50Z
date_updated: 2024-08-12T13:43:32Z
ddc:
- '510'
department:
- _id: '636'
external_id:
arxiv:
- '2407.07642'
file:
- access_level: open_access
content_type: application/pdf
creator: coffen
date_created: 2024-07-10T13:39:32Z
date_updated: 2024-07-10T13:39:32Z
description: |-
We introduce a method based on Gaussian process regression to identify discrete
variational principles from observed solutions of a field theory. The method is based on the data-based identification of a discrete Lagrangian density. It is a geometric machine learning technique in the sense that the variational structure of the true field theory is reflected in the data-driven model by design.
We provide a rigorous convergence statement of the method.
The proof circumvents challenges posed by the ambiguity of discrete Lagrangian densities in the inverse problem of variational calculus.
Moreover, our method can be used to quantify model uncertainty in the equations of motions and any linear observable of the discrete field theory.
This is illustrated on the example of the discrete wave equation and Schrödinger equation.
The article constitutes an extension of our previous article for the data-driven identification of (discrete) Lagrangians for variational dynamics from an ode setting to the setting of discrete pdes.
file_id: '55160'
file_name: L_Collocation.pdf
file_size: 4569314
relation: main_file
title: Machine learning of discrete field theories with guaranteed convergence and
uncertainty quantification
file_date_updated: 2024-07-10T13:39:32Z
has_accepted_license: '1'
keyword:
- System identification
- inverse problem of variational calculus
- Gaussian process
- Lagrangian learning
- physics informed machine learning
- geometry aware learning
language:
- iso: eng
oa: '1'
page: '28'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication_status: submitted
related_material:
link:
- description: GitHub
relation: software
url: https://github.com/Christian-Offen/Lagrangian_GP_PDE
status: public
title: Machine learning of discrete field theories with guaranteed convergence and
uncertainty quantification
type: preprint
user_id: '85279'
year: '2024'
...
---
_id: '55989'
abstract:
- lang: eng
text: Phased arrays are vital in communication systems and have received significant
interest in the field of optoelectronics and photonics, enabling a wide range
of applications such as LiDAR, holography, wireless communication, etc. In this
work, we present a blazed grating antenna that is optimized to have upward radiation
efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational
wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna
in a 64 × 64 phased array configuration is capable of producing desired far-field
radiation patterns. Additionally, our antenna possesses a low side lobe level
of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive
candidate for integrated optical phased arrays.
article_type: original
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Suraj
full_name: Joshi, Suraj
last_name: Joshi
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient
compact blazed grating antenna for optical phased arrays. Journal of Physics:
Photonics. 2024;6:045010. doi:10.1088/2515-7647/ad6ed4'
apa: 'Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2024). An efficient compact blazed grating antenna for optical phased arrays.
Journal of Physics: Photonics, 6, 045010. https://doi.org/10.1088/2515-7647/ad6ed4'
bibtex: '@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An
efficient compact blazed grating antenna for optical phased arrays}, volume={6},
DOI={10.1088/2515-7647/ad6ed4},
journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen,
Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and
Förstner, Jens}, year={2024}, pages={045010} }'
chicago: 'Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased
Arrays.” Journal of Physics: Photonics 6 (2024): 045010. https://doi.org/10.1088/2515-7647/ad6ed4.'
ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“An efficient compact blazed grating antenna for optical phased arrays,” Journal
of Physics: Photonics, vol. 6, p. 045010, 2024, doi: 10.1088/2515-7647/ad6ed4.'
mla: 'Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical
Phased Arrays.” Journal of Physics: Photonics, vol. 6, IOP Publishing,
2024, p. 045010, doi:10.1088/2515-7647/ad6ed4.'
short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal
of Physics: Photonics 6 (2024) 045010.'
date_created: 2024-09-02T12:08:18Z
date_updated: 2024-09-02T12:23:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '58'
doi: 10.1088/2515-7647/ad6ed4
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-09-02T12:13:55Z
date_updated: 2024-09-02T12:13:55Z
file_id: '55990'
file_name: 2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating
antenna for optical phased arrays (official version).pdf
file_size: 1492402
relation: main_file
file_date_updated: 2024-09-02T12:13:55Z
has_accepted_license: '1'
intvolume: ' 6'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '045010'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: An efficient compact blazed grating antenna for optical phased arrays
type: journal_article
user_id: '158'
volume: 6
year: '2024'
...
---
_id: '56194'
author:
- first_name: Reza
full_name: Afsahnoudeh, Reza
id: '90390'
last_name: Afsahnoudeh
orcid: https://orcid.org/0009-0001-3161-8036
- first_name: Julia
full_name: Riese, Julia
id: '101499'
last_name: Riese
orcid: 0000-0002-3053-0534
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
citation:
ama: 'Afsahnoudeh R, Riese J, Kenig EY. A Numerical Analysis of Thermo-Hydraulic
Performance of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures.
In: World Congress on Mechanical, Chemical, and Material Engineering. Avestia
Publishing; 2024. doi:10.11159/htff24.145'
apa: Afsahnoudeh, R., Riese, J., & Kenig, E. Y. (2024). A Numerical Analysis
of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
Secondary Structures. World Congress on Mechanical, Chemical, and Material
Engineering. 10th International Conference on Heat Transfer and Fluid Flow,
Barcelona. https://doi.org/10.11159/htff24.145
bibtex: '@inproceedings{Afsahnoudeh_Riese_Kenig_2024, title={A Numerical Analysis
of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
Secondary Structures}, DOI={10.11159/htff24.145},
booktitle={World Congress on Mechanical, Chemical, and Material Engineering},
publisher={Avestia Publishing}, author={Afsahnoudeh, Reza and Riese, Julia and
Kenig, Eugeny Y.}, year={2024} }'
chicago: Afsahnoudeh, Reza, Julia Riese, and Eugeny Y. Kenig. “A Numerical Analysis
of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
Secondary Structures.” In World Congress on Mechanical, Chemical, and Material
Engineering. Avestia Publishing, 2024. https://doi.org/10.11159/htff24.145.
ieee: 'R. Afsahnoudeh, J. Riese, and E. Y. Kenig, “A Numerical Analysis of Thermo-Hydraulic
Performance of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures,”
presented at the 10th International Conference on Heat Transfer and Fluid Flow,
Barcelona, 2024, doi: 10.11159/htff24.145.'
mla: Afsahnoudeh, Reza, et al. “A Numerical Analysis of Thermo-Hydraulic Performance
of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures.” World
Congress on Mechanical, Chemical, and Material Engineering, Avestia Publishing,
2024, doi:10.11159/htff24.145.
short: 'R. Afsahnoudeh, J. Riese, E.Y. Kenig, in: World Congress on Mechanical,
Chemical, and Material Engineering, Avestia Publishing, 2024.'
conference:
end_date: 2024-08-24
location: Barcelona
name: 10th International Conference on Heat Transfer and Fluid Flow
start_date: 2024-08-22
date_created: 2024-09-23T07:28:01Z
date_updated: 2024-09-23T07:31:11Z
department:
- _id: '831'
doi: 10.11159/htff24.145
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: World Congress on Mechanical, Chemical, and Material Engineering
publication_identifier:
issn:
- 2369-8136
publication_status: published
publisher: Avestia Publishing
quality_controlled: '1'
status: public
title: A Numerical Analysis of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers
with Ellipsoidal Secondary Structures
type: conference
user_id: '90390'
year: '2024'
...
---
_id: '56605'
author:
- first_name: Jan-Oliver
full_name: Opdenhövel, Jan-Oliver
id: '73960'
last_name: Opdenhövel
orcid: 0000-0003-2314-2784
- first_name: Christoph
full_name: Alt, Christoph
id: '100625'
last_name: Alt
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
citation:
ama: 'Opdenhövel J-O, Alt C, Plessl C, Kenter T. StencilStream: A SYCL-based Stencil
Simulation Framework Targeting FPGAs. In: 2024 34th International Conference
on Field-Programmable Logic and Applications (FPL). IEEE; 2024. doi:10.1109/fpl64840.2024.00023'
apa: 'Opdenhövel, J.-O., Alt, C., Plessl, C., & Kenter, T. (2024). StencilStream:
A SYCL-based Stencil Simulation Framework Targeting FPGAs. 2024 34th International
Conference on Field-Programmable Logic and Applications (FPL). https://doi.org/10.1109/fpl64840.2024.00023'
bibtex: '@inproceedings{Opdenhövel_Alt_Plessl_Kenter_2024, title={StencilStream:
A SYCL-based Stencil Simulation Framework Targeting FPGAs}, DOI={10.1109/fpl64840.2024.00023},
booktitle={2024 34th International Conference on Field-Programmable Logic and
Applications (FPL)}, publisher={IEEE}, author={Opdenhövel, Jan-Oliver and Alt,
Christoph and Plessl, Christian and Kenter, Tobias}, year={2024} }'
chicago: 'Opdenhövel, Jan-Oliver, Christoph Alt, Christian Plessl, and Tobias Kenter.
“StencilStream: A SYCL-Based Stencil Simulation Framework Targeting FPGAs.” In
2024 34th International Conference on Field-Programmable Logic and Applications
(FPL). IEEE, 2024. https://doi.org/10.1109/fpl64840.2024.00023.'
ieee: 'J.-O. Opdenhövel, C. Alt, C. Plessl, and T. Kenter, “StencilStream: A SYCL-based
Stencil Simulation Framework Targeting FPGAs,” 2024, doi: 10.1109/fpl64840.2024.00023.'
mla: 'Opdenhövel, Jan-Oliver, et al. “StencilStream: A SYCL-Based Stencil Simulation
Framework Targeting FPGAs.” 2024 34th International Conference on Field-Programmable
Logic and Applications (FPL), IEEE, 2024, doi:10.1109/fpl64840.2024.00023.'
short: 'J.-O. Opdenhövel, C. Alt, C. Plessl, T. Kenter, in: 2024 34th International
Conference on Field-Programmable Logic and Applications (FPL), IEEE, 2024.'
date_created: 2024-10-14T07:49:24Z
date_updated: 2024-10-14T07:56:26Z
department:
- _id: '27'
- _id: '518'
doi: 10.1109/fpl64840.2024.00023
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 2024 34th International Conference on Field-Programmable Logic and Applications
(FPL)
publication_status: published
publisher: IEEE
quality_controlled: '1'
status: public
title: 'StencilStream: A SYCL-based Stencil Simulation Framework Targeting FPGAs'
type: conference
user_id: '3145'
year: '2024'
...
---
_id: '56609'
abstract:
- lang: eng
text: 'The computation of electron repulsion integrals (ERIs) is a key component
for quantum chemical methods. The intensive computation and bandwidth demand for
ERI evaluation presents a significant challenge for quantum-mechanics-based atomistic
simulations with hybrid density functional theory: due to the tens of trillions
of ERI computations in each time step, practical applications are usually limited
to thousands of atoms. In this work, we propose SERI, a high-throughput streaming
accelerator for ERI computation on HBM-based FPGAs. In contrast to prior buffer-based
designs, SERI proposes a novel streaming architecture to address the on-chip buffer
limitation and the floorplanning challenge, and leverages the high-bandwidth memory
to overcome the bandwidth bottleneck in prior designs. Moreover, to meet the varying
computation, bandwidth, and floorplanning requirements between the 55 canonical
quartet classes in ERI calculation, we design an automation tool, together with
an accurate performance model, to automatically customize the architecture and
floorplanning strategy for each canonical quartet class to maximize their throughput.
Our performance evaluation on the AMD/Xilinx Alveo U280 FPGA board shows that,
SERI achieves an average speedup of 9.80 x over the previous best-performing FPGA
design, a 3.21x speedup over a 64-core AMD EPYC 7713 CPU, and a 15.64x speedup
over an Nvidia A40 GPU. It reaches a peak throughput of 23.8 GERIS ($10^9$ ERIs
per second) on one Alveo U280 FPGA. SERI will be released soon at https://github.com/SFU-HiAccel/SERI.'
author:
- first_name: Philip
full_name: Stachura, Philip
last_name: Stachura
- first_name: Guanyu
full_name: Li, Guanyu
last_name: Li
- first_name: Xin
full_name: Wu, Xin
id: '77439'
last_name: Wu
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
- first_name: Zhenman
full_name: Fang, Zhenman
last_name: Fang
citation:
ama: 'Stachura P, Li G, Wu X, Plessl C, Fang Z. SERI: High-Throughput Streaming
Acceleration of Electron Repulsion Integral Computation in Quantum Chemistry using
HBM-based FPGAs. In: 2024 34th International Conference on Field-Programmable
Logic and Applications (FPL). IEEE; 2024:60-68. doi:10.1109/fpl64840.2024.00018'
apa: 'Stachura, P., Li, G., Wu, X., Plessl, C., & Fang, Z. (2024). SERI: High-Throughput
Streaming Acceleration of Electron Repulsion Integral Computation in Quantum Chemistry
using HBM-based FPGAs. 2024 34th International Conference on Field-Programmable
Logic and Applications (FPL), 60–68. https://doi.org/10.1109/fpl64840.2024.00018'
bibtex: '@inproceedings{Stachura_Li_Wu_Plessl_Fang_2024, title={SERI: High-Throughput
Streaming Acceleration of Electron Repulsion Integral Computation in Quantum Chemistry
using HBM-based FPGAs}, DOI={10.1109/fpl64840.2024.00018},
booktitle={2024 34th International Conference on Field-Programmable Logic and
Applications (FPL)}, publisher={IEEE}, author={Stachura, Philip and Li, Guanyu
and Wu, Xin and Plessl, Christian and Fang, Zhenman}, year={2024}, pages={60–68}
}'
chicago: 'Stachura, Philip, Guanyu Li, Xin Wu, Christian Plessl, and Zhenman Fang.
“SERI: High-Throughput Streaming Acceleration of Electron Repulsion Integral Computation
in Quantum Chemistry Using HBM-Based FPGAs.” In 2024 34th International Conference
on Field-Programmable Logic and Applications (FPL), 60–68. IEEE, 2024. https://doi.org/10.1109/fpl64840.2024.00018.'
ieee: 'P. Stachura, G. Li, X. Wu, C. Plessl, and Z. Fang, “SERI: High-Throughput
Streaming Acceleration of Electron Repulsion Integral Computation in Quantum Chemistry
using HBM-based FPGAs,” in 2024 34th International Conference on Field-Programmable
Logic and Applications (FPL), 2024, pp. 60–68, doi: 10.1109/fpl64840.2024.00018.'
mla: 'Stachura, Philip, et al. “SERI: High-Throughput Streaming Acceleration of
Electron Repulsion Integral Computation in Quantum Chemistry Using HBM-Based FPGAs.”
2024 34th International Conference on Field-Programmable Logic and Applications
(FPL), IEEE, 2024, pp. 60–68, doi:10.1109/fpl64840.2024.00018.'
short: 'P. Stachura, G. Li, X. Wu, C. Plessl, Z. Fang, in: 2024 34th International
Conference on Field-Programmable Logic and Applications (FPL), IEEE, 2024, pp.
60–68.'
date_created: 2024-10-14T08:44:44Z
date_updated: 2024-10-15T08:37:27Z
department:
- _id: '27'
- _id: '518'
doi: 10.1109/fpl64840.2024.00018
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/document/10705609
page: 60-68
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 2024 34th International Conference on Field-Programmable Logic and Applications
(FPL)
publication_status: published
publisher: IEEE
quality_controlled: '1'
status: public
title: 'SERI: High-Throughput Streaming Acceleration of Electron Repulsion Integral
Computation in Quantum Chemistry using HBM-based FPGAs'
type: conference
user_id: '77439'
year: '2024'
...
---
_id: '56678'
abstract:
- lang: eng
text: AbstractThe surface area of atoms and molecules
plays a crucial role in shaping many physiochemical properties of materials. Despite
its fundamental importance, precisely defining atomic and molecular surfaces has
long been a puzzle. Among the available definitions, a straightforward and elegant
approach by Bader describes a molecular surface as an iso-density surface beyond
which the electron density drops below a certain cut-off. However, so far neither
this theory nor a decisive value for the density cut-off have been amenable to
experimental verification due to the limitations of conventional experimental
methods. In the present study, we employ a state-of-the-art experimental method
based on the recently developed concept of thermodynamically effective (TE) surfaces
to tackle this longstanding problem. By studying a set of 104 molecules, a close
to perfect agreement between quantum chemical evaluations of iso-density surfaces
contoured at a cut-off density of 0.0016 a.u. and experimental results obtained
via thermodynamic phase change data is demonstrated, with a mean unsigned percentage
deviation of 1.6% and a correlation coefficient of 0.995. Accordingly, we suggest
the iso-density surface contoured at an electron density value of 0.0016 a.u.
as a representation of the surface of atoms and molecules.
article_number: '6086'
author:
- first_name: Amin
full_name: Alibakhshi, Amin
last_name: Alibakhshi
- first_name: Lars V.
full_name: Schäfer, Lars V.
last_name: Schäfer
citation:
ama: Alibakhshi A, Schäfer LV. Electron iso-density surfaces provide a thermodynamically
consistent representation of atomic and molecular surfaces. Nature Communications.
2024;15(1). doi:10.1038/s41467-024-50408-8
apa: Alibakhshi, A., & Schäfer, L. V. (2024). Electron iso-density surfaces
provide a thermodynamically consistent representation of atomic and molecular
surfaces. Nature Communications, 15(1), Article 6086. https://doi.org/10.1038/s41467-024-50408-8
bibtex: '@article{Alibakhshi_Schäfer_2024, title={Electron iso-density surfaces
provide a thermodynamically consistent representation of atomic and molecular
surfaces}, volume={15}, DOI={10.1038/s41467-024-50408-8},
number={16086}, journal={Nature Communications}, publisher={Springer Science and
Business Media LLC}, author={Alibakhshi, Amin and Schäfer, Lars V.}, year={2024}
}'
chicago: Alibakhshi, Amin, and Lars V. Schäfer. “Electron Iso-Density Surfaces Provide
a Thermodynamically Consistent Representation of Atomic and Molecular Surfaces.”
Nature Communications 15, no. 1 (2024). https://doi.org/10.1038/s41467-024-50408-8.
ieee: 'A. Alibakhshi and L. V. Schäfer, “Electron iso-density surfaces provide a
thermodynamically consistent representation of atomic and molecular surfaces,”
Nature Communications, vol. 15, no. 1, Art. no. 6086, 2024, doi: 10.1038/s41467-024-50408-8.'
mla: Alibakhshi, Amin, and Lars V. Schäfer. “Electron Iso-Density Surfaces Provide
a Thermodynamically Consistent Representation of Atomic and Molecular Surfaces.”
Nature Communications, vol. 15, no. 1, 6086, Springer Science and Business
Media LLC, 2024, doi:10.1038/s41467-024-50408-8.
short: A. Alibakhshi, L.V. Schäfer, Nature Communications 15 (2024).
date_created: 2024-10-18T07:00:00Z
date_updated: 2024-10-18T07:00:43Z
doi: 10.1038/s41467-024-50408-8
intvolume: ' 15'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Electron iso-density surfaces provide a thermodynamically consistent representation
of atomic and molecular surfaces
type: journal_article
user_id: '67287'
volume: 15
year: '2024'
...
---
_id: '56679'
author:
- first_name: Amin
full_name: Alibakhshi, Amin
last_name: Alibakhshi
- first_name: Lars V.
full_name: Schäfer, Lars V.
last_name: Schäfer
citation:
ama: Alibakhshi A, Schäfer LV. On the Theoretical Quantification of Radii of Atoms
in Molecules. The Journal of Physical Chemistry A. 2024;128(32):6819-6823.
doi:10.1021/acs.jpca.4c04529
apa: Alibakhshi, A., & Schäfer, L. V. (2024). On the Theoretical Quantification
of Radii of Atoms in Molecules. The Journal of Physical Chemistry A, 128(32),
6819–6823. https://doi.org/10.1021/acs.jpca.4c04529
bibtex: '@article{Alibakhshi_Schäfer_2024, title={On the Theoretical Quantification
of Radii of Atoms in Molecules}, volume={128}, DOI={10.1021/acs.jpca.4c04529},
number={32}, journal={The Journal of Physical Chemistry A}, publisher={American
Chemical Society (ACS)}, author={Alibakhshi, Amin and Schäfer, Lars V.}, year={2024},
pages={6819–6823} }'
chicago: 'Alibakhshi, Amin, and Lars V. Schäfer. “On the Theoretical Quantification
of Radii of Atoms in Molecules.” The Journal of Physical Chemistry A 128,
no. 32 (2024): 6819–23. https://doi.org/10.1021/acs.jpca.4c04529.'
ieee: 'A. Alibakhshi and L. V. Schäfer, “On the Theoretical Quantification of Radii
of Atoms in Molecules,” The Journal of Physical Chemistry A, vol. 128,
no. 32, pp. 6819–6823, 2024, doi: 10.1021/acs.jpca.4c04529.'
mla: Alibakhshi, Amin, and Lars V. Schäfer. “On the Theoretical Quantification of
Radii of Atoms in Molecules.” The Journal of Physical Chemistry A, vol.
128, no. 32, American Chemical Society (ACS), 2024, pp. 6819–23, doi:10.1021/acs.jpca.4c04529.
short: A. Alibakhshi, L.V. Schäfer, The Journal of Physical Chemistry A 128 (2024)
6819–6823.
date_created: 2024-10-18T07:00:54Z
date_updated: 2024-10-18T07:01:06Z
doi: 10.1021/acs.jpca.4c04529
intvolume: ' 128'
issue: '32'
language:
- iso: eng
page: 6819-6823
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: The Journal of Physical Chemistry A
publication_identifier:
issn:
- 1089-5639
- 1520-5215
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: On the Theoretical Quantification of Radii of Atoms in Molecules
type: journal_article
user_id: '67287'
volume: 128
year: '2024'
...
---
_id: '56778'
article_number: '120639'
author:
- first_name: Sören Antonius
full_name: Bernemann, Sören Antonius
id: '70108'
last_name: Bernemann
- first_name: J.F.
full_name: Maćkowiak, J.F.
last_name: Maćkowiak
- first_name: J.
full_name: Maćkowiak, J.
last_name: Maćkowiak
- first_name: Eugeny
full_name: Kenig, Eugeny
id: '665'
last_name: Kenig
citation:
ama: Bernemann SA, Maćkowiak JF, Maćkowiak J, Kenig E. Computer aided flow investigation
of liquid agricultural wastes. Chemical Engineering Science. 2024;300.
doi:10.1016/j.ces.2024.120639
apa: Bernemann, S. A., Maćkowiak, J. F., Maćkowiak, J., & Kenig, E. (2024).
Computer aided flow investigation of liquid agricultural wastes. Chemical Engineering
Science, 300, Article 120639. https://doi.org/10.1016/j.ces.2024.120639
bibtex: '@article{Bernemann_Maćkowiak_Maćkowiak_Kenig_2024, title={Computer aided
flow investigation of liquid agricultural wastes}, volume={300}, DOI={10.1016/j.ces.2024.120639},
number={120639}, journal={Chemical Engineering Science}, publisher={Elsevier BV},
author={Bernemann, Sören Antonius and Maćkowiak, J.F. and Maćkowiak, J. and Kenig,
Eugeny}, year={2024} }'
chicago: Bernemann, Sören Antonius, J.F. Maćkowiak, J. Maćkowiak, and Eugeny Kenig.
“Computer Aided Flow Investigation of Liquid Agricultural Wastes.” Chemical
Engineering Science 300 (2024). https://doi.org/10.1016/j.ces.2024.120639.
ieee: 'S. A. Bernemann, J. F. Maćkowiak, J. Maćkowiak, and E. Kenig, “Computer aided
flow investigation of liquid agricultural wastes,” Chemical Engineering Science,
vol. 300, Art. no. 120639, 2024, doi: 10.1016/j.ces.2024.120639.'
mla: Bernemann, Sören Antonius, et al. “Computer Aided Flow Investigation of Liquid
Agricultural Wastes.” Chemical Engineering Science, vol. 300, 120639, Elsevier
BV, 2024, doi:10.1016/j.ces.2024.120639.
short: S.A. Bernemann, J.F. Maćkowiak, J. Maćkowiak, E. Kenig, Chemical Engineering
Science 300 (2024).
date_created: 2024-10-29T09:10:25Z
date_updated: 2024-10-29T09:13:02Z
department:
- _id: '9'
- _id: '145'
doi: 10.1016/j.ces.2024.120639
intvolume: ' 300'
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Chemical Engineering Science
publication_identifier:
issn:
- 0009-2509
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Computer aided flow investigation of liquid agricultural wastes
type: journal_article
user_id: '70108'
volume: 300
year: '2024'
...
---
_id: '52958'
author:
- first_name: Christoph
full_name: Boeddeker, Christoph
id: '40767'
last_name: Boeddeker
- first_name: Aswin Shanmugam
full_name: Subramanian, Aswin Shanmugam
last_name: Subramanian
- first_name: Gordon
full_name: Wichern, Gordon
last_name: Wichern
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
- first_name: Jonathan
full_name: Le Roux, Jonathan
last_name: Le Roux
citation:
ama: 'Boeddeker C, Subramanian AS, Wichern G, Haeb-Umbach R, Le Roux J. TS-SEP:
Joint Diarization and Separation Conditioned on Estimated Speaker Embeddings.
IEEE/ACM Transactions on Audio, Speech, and Language Processing. 2024;32:1185-1197.
doi:10.1109/taslp.2024.3350887'
apa: 'Boeddeker, C., Subramanian, A. S., Wichern, G., Haeb-Umbach, R., & Le
Roux, J. (2024). TS-SEP: Joint Diarization and Separation Conditioned on Estimated
Speaker Embeddings. IEEE/ACM Transactions on Audio, Speech, and Language Processing,
32, 1185–1197. https://doi.org/10.1109/taslp.2024.3350887'
bibtex: '@article{Boeddeker_Subramanian_Wichern_Haeb-Umbach_Le Roux_2024, title={TS-SEP:
Joint Diarization and Separation Conditioned on Estimated Speaker Embeddings},
volume={32}, DOI={10.1109/taslp.2024.3350887},
journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing}, publisher={Institute
of Electrical and Electronics Engineers (IEEE)}, author={Boeddeker, Christoph
and Subramanian, Aswin Shanmugam and Wichern, Gordon and Haeb-Umbach, Reinhold
and Le Roux, Jonathan}, year={2024}, pages={1185–1197} }'
chicago: 'Boeddeker, Christoph, Aswin Shanmugam Subramanian, Gordon Wichern, Reinhold
Haeb-Umbach, and Jonathan Le Roux. “TS-SEP: Joint Diarization and Separation Conditioned
on Estimated Speaker Embeddings.” IEEE/ACM Transactions on Audio, Speech, and
Language Processing 32 (2024): 1185–97. https://doi.org/10.1109/taslp.2024.3350887.'
ieee: 'C. Boeddeker, A. S. Subramanian, G. Wichern, R. Haeb-Umbach, and J. Le Roux,
“TS-SEP: Joint Diarization and Separation Conditioned on Estimated Speaker Embeddings,”
IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 32,
pp. 1185–1197, 2024, doi: 10.1109/taslp.2024.3350887.'
mla: 'Boeddeker, Christoph, et al. “TS-SEP: Joint Diarization and Separation Conditioned
on Estimated Speaker Embeddings.” IEEE/ACM Transactions on Audio, Speech, and
Language Processing, vol. 32, Institute of Electrical and Electronics Engineers
(IEEE), 2024, pp. 1185–97, doi:10.1109/taslp.2024.3350887.'
short: C. Boeddeker, A.S. Subramanian, G. Wichern, R. Haeb-Umbach, J. Le Roux, IEEE/ACM
Transactions on Audio, Speech, and Language Processing 32 (2024) 1185–1197.
date_created: 2024-03-26T16:11:54Z
date_updated: 2025-04-16T10:21:45Z
ddc:
- '000'
department:
- _id: '54'
doi: 10.1109/taslp.2024.3350887
file:
- access_level: open_access
content_type: application/pdf
creator: cbj
date_created: 2025-04-16T10:14:47Z
date_updated: 2025-04-16T10:21:45Z
file_id: '59602'
file_name: main.pdf
file_size: 3432879
relation: main_file
- access_level: open_access
content_type: application/pdf
creator: cbj
date_created: 2025-04-16T10:15:08Z
date_updated: 2025-04-16T10:21:45Z
file_id: '59603'
file_name: slides.pdf
file_size: 2838635
relation: main_file
- access_level: open_access
content_type: application/pdf
creator: cbj
date_created: 2025-04-16T10:15:22Z
date_updated: 2025-04-16T10:21:45Z
file_id: '59604'
file_name: poster.pdf
file_size: 2038741
relation: main_file
file_date_updated: 2025-04-16T10:21:45Z
has_accepted_license: '1'
intvolume: ' 32'
keyword:
- Electrical and Electronic Engineering
- Acoustics and Ultrasonics
- Computer Science (miscellaneous)
- Computational Mathematics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2303.03849
oa: '1'
page: 1185-1197
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '508'
grant_number: '448568305'
name: Automatische Transkription von Gesprächssituationen
publication: IEEE/ACM Transactions on Audio, Speech, and Language Processing
publication_identifier:
issn:
- 2329-9290
- 2329-9304
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: 'TS-SEP: Joint Diarization and Separation Conditioned on Estimated Speaker
Embeddings'
type: journal_article
user_id: '40767'
volume: 32
year: '2024'
...
---
_id: '55638'
abstract:
- lang: eng
text: Abstract. Traditionally, joints are cylindrical and rotationally symmetric.
In the present study, non-rotationally symmetric joints are used for joining steel
and Glass mat-reinforced thermoplastic sheets (GMT). In addition, the study also
analyzes the impact of non-rotational symmetric joint rotation on the load-bearing
capacity. Single lap joint specimens were fabricated using the In-Mold assembly
technique for joining steel sheets with GMT. Tensile shear tests were performed
on different orientations of the joint geometry, and it was observed that changing
the joint orientation influences the load-bearing capacity. The joints are constitutively
modeled using beam elements and the influence of joint rotation on load distribution
is examined through a static simulation study.
author:
- first_name: Deekshith Reddy
full_name: Devulapally, Deekshith Reddy
id: '76837'
last_name: Devulapally
- first_name: Sven
full_name: Martin, Sven
id: '38177'
last_name: Martin
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
citation:
ama: 'Devulapally DR, Martin S, Tröster T. Non-rotationally symmetric joints – Mechanisms
and load bearing capacity. In: Materials Research Proceedings. Materials
Research Forum LLC; 2024. doi:10.21741/9781644903131-183'
apa: Devulapally, D. R., Martin, S., & Tröster, T. (2024). Non-rotationally
symmetric joints – Mechanisms and load bearing capacity. Materials Research
Proceedings. https://doi.org/10.21741/9781644903131-183
bibtex: '@inproceedings{Devulapally_Martin_Tröster_2024, title={Non-rotationally
symmetric joints – Mechanisms and load bearing capacity}, DOI={10.21741/9781644903131-183},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Devulapally, Deekshith Reddy and Martin, Sven and Tröster, Thomas},
year={2024} }'
chicago: Devulapally, Deekshith Reddy, Sven Martin, and Thomas Tröster. “Non-Rotationally
Symmetric Joints – Mechanisms and Load Bearing Capacity.” In Materials Research
Proceedings. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-183.
ieee: 'D. R. Devulapally, S. Martin, and T. Tröster, “Non-rotationally symmetric
joints – Mechanisms and load bearing capacity,” 2024, doi: 10.21741/9781644903131-183.'
mla: Devulapally, Deekshith Reddy, et al. “Non-Rotationally Symmetric Joints – Mechanisms
and Load Bearing Capacity.” Materials Research Proceedings, Materials Research
Forum LLC, 2024, doi:10.21741/9781644903131-183.
short: 'D.R. Devulapally, S. Martin, T. Tröster, in: Materials Research Proceedings,
Materials Research Forum LLC, 2024.'
date_created: 2024-08-19T08:29:22Z
date_updated: 2026-02-27T10:50:30Z
department:
- _id: '149'
- _id: '321'
- _id: '9'
doi: 10.21741/9781644903131-183
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '140'
name: 'TRR 285 – B01: TRR 285 - Subproject B01'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Non-rotationally symmetric joints – Mechanisms and load bearing capacity
type: conference
user_id: '76837'
year: '2024'
...
---
_id: '61251'
abstract:
- lang: eng
text: We theoretically investigate strategies for the deterministic creation
of trains of time-bin entangled photons using an individual quantum emitter described
by a Λ-type electronic system. We explicitly demonstrate the theoretical generation
of linear cluster states with substantial numbers of entangled photonic qubits
in full microscopic numerical simulations. The underlying scheme is based on the
manipulation of ground state coherences through precise optical driving. One important
finding is that the most easily accessible quality metrics, the achievable rotation
fidelities, fall short in assessing the actual quantum correlations of the emitted
photons in the face of losses. To address this, we explicitly calculate stabilizer
generator expectation values as a superior gauge for the quantum properties of
the generated many-photon state. With widespread applicability in other emitter
and excitation–emission schemes also, our work lays the conceptual foundations
for an in-depth practical analysis of time-bin entanglement based on full numerical
simulations with predictive capabilities for realistic systems and setups, including
losses and imperfections. The specific results shown in the present work illustrate
that with controlled minimization of losses and realistic system parameters for
quantum-dot type systems, useful linear cluster states of significant lengths
can be generated in the calculations, discussing the possibility of scalability
for quantum information processing endeavors.
article_number: '036110'
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: Nils
full_name: Heinisch, Nils
id: '90283'
last_name: Heinisch
orcid: 0009-0006-0984-2097
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic
generation of linear photonic cluster states. APL Quantum. 2024;1(3). doi:10.1063/5.0214197
apa: Bauch, D., Köcher, N., Heinisch, N., & Schumacher, S. (2024). Time-bin
entanglement in the deterministic generation of linear photonic cluster states.
APL Quantum, 1(3), Article 036110. https://doi.org/10.1063/5.0214197
bibtex: '@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement
in the deterministic generation of linear photonic cluster states}, volume={1},
DOI={10.1063/5.0214197}, number={3036110},
journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher,
Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }'
chicago: Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin
Entanglement in the Deterministic Generation of Linear Photonic Cluster States.”
APL Quantum 1, no. 3 (2024). https://doi.org/10.1063/5.0214197.
ieee: 'D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement
in the deterministic generation of linear photonic cluster states,” APL Quantum,
vol. 1, no. 3, Art. no. 036110, 2024, doi: 10.1063/5.0214197.'
mla: Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation
of Linear Photonic Cluster States.” APL Quantum, vol. 1, no. 3, 036110,
AIP Publishing, 2024, doi:10.1063/5.0214197.
short: D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).
date_created: 2025-09-12T11:08:59Z
date_updated: 2025-09-12T11:11:32Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
- _id: '623'
doi: 10.1063/5.0214197
intvolume: ' 1'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '173'
name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: APL Quantum
publication_identifier:
issn:
- 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Time-bin entanglement in the deterministic generation of linear photonic cluster
states
type: journal_article
user_id: '16199'
volume: 1
year: '2024'
...
---
_id: '61253'
abstract:
- lang: eng
text: "In the SUPER scheme (Swing-UP of the quantum EmitteR population),
excitation of a quantum emitter is achieved with two off-resonant, red-detuned
laser pulses. This allows the generation of high-quality single photons without
the need of complex laser stray light suppression or careful spectral filtering.
In the present work, we extend this promising method to quantum emitters, specifically
semiconductor quantum dots, inside a resonant optical cavity. A significant advantage
of the SUPER scheme is identified in that it eliminates re-excitation of the quantum
emitter by suppressing photon emission during the excitation cycle. This, in turn,
leads to almost ideal single-photon purity, overcoming a major factor typically
limiting the quality of photons generated with quantum emitters in high-quality
cavities. We further find that for cavity-mediated biexciton emission of degenerate
photon pairs, the SUPER scheme leads to near-perfect biexciton initialization
with very high values of polarization entanglement of emitted photon pairs.\r\n
\ \r\n \r\n \r\n
\ \r\n Published
by the American Physical Society\r\n 2024\r\n
\ \r\n \r\n
\ "
article_number: L012017
author:
- first_name: Nils
full_name: Heinisch, Nils
id: '90283'
last_name: Heinisch
orcid: 0009-0006-0984-2097
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: 'Heinisch N, Köcher N, Bauch D, Schumacher S. Swing-up dynamics in quantum
emitter cavity systems: Near ideal single photons and entangled photon pairs.
Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.l012017'
apa: 'Heinisch, N., Köcher, N., Bauch, D., & Schumacher, S. (2024). Swing-up
dynamics in quantum emitter cavity systems: Near ideal single photons and entangled
photon pairs. Physical Review Research, 6(1), Article L012017. https://doi.org/10.1103/physrevresearch.6.l012017'
bibtex: '@article{Heinisch_Köcher_Bauch_Schumacher_2024, title={Swing-up dynamics
in quantum emitter cavity systems: Near ideal single photons and entangled photon
pairs}, volume={6}, DOI={10.1103/physrevresearch.6.l012017},
number={1L012017}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Heinisch, Nils and Köcher, Nikolas and Bauch, David and
Schumacher, Stefan}, year={2024} }'
chicago: 'Heinisch, Nils, Nikolas Köcher, David Bauch, and Stefan Schumacher. “Swing-up
Dynamics in Quantum Emitter Cavity Systems: Near Ideal Single Photons and Entangled
Photon Pairs.” Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.l012017.'
ieee: 'N. Heinisch, N. Köcher, D. Bauch, and S. Schumacher, “Swing-up dynamics in
quantum emitter cavity systems: Near ideal single photons and entangled photon
pairs,” Physical Review Research, vol. 6, no. 1, Art. no. L012017, 2024,
doi: 10.1103/physrevresearch.6.l012017.'
mla: 'Heinisch, Nils, et al. “Swing-up Dynamics in Quantum Emitter Cavity Systems:
Near Ideal Single Photons and Entangled Photon Pairs.” Physical Review Research,
vol. 6, no. 1, L012017, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.l012017.'
short: N. Heinisch, N. Köcher, D. Bauch, S. Schumacher, Physical Review Research
6 (2024).
date_created: 2025-09-12T11:16:31Z
date_updated: 2025-09-12T11:18:05Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1103/physrevresearch.6.l012017
intvolume: ' 6'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '173'
name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons
and entangled photon pairs'
type: journal_article
user_id: '16199'
volume: 6
year: '2024'
...
---
_id: '61255'
abstract:
- lang: eng
text: "Abstract\r\n Topological states
have been widely investigated in different types of systems and lattices. In the
present work, we report on topological edge states in double-wave (DW) chains,
which can be described by a generalized Aubry-André-Harper (AAH) model. For the
specific system of a driven-dissipative exciton polariton system we show that
in such potential chains, different types of edge states can form. For resonant
optical excitation, we further find that the optical nonlinearity leads to a multistability
of different edge states. This includes topologically protected edge states evolved
directly from individual linear eigenstates as well as additional edge states
that originate from nonlinearity-induced localization of bulk states. Extending
the system into two dimensions (2D) by stacking horizontal DW chains in the vertical
direction, we also create 2D multi-wave lattices. In such 2D lattices multiple
Su–Schrieffer–Heeger (SSH) chains appear along the vertical direction. The combination
of DW chains in the horizonal and SSH chains in the vertical direction then results
in the formation of higher-order topological insulator corner states. Multistable
corner states emerge in the nonlinear regime."
author:
- first_name: Tobias
full_name: Schneider, Tobias
last_name: Schneider
- first_name: Wenlong
full_name: Gao, Wenlong
id: '78853'
last_name: Gao
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
citation:
ama: Schneider T, Gao W, Zentgraf T, Schumacher S, Ma X. Topological edge and corner
states in coupled wave lattices in nonlinear polariton condensates. Nanophotonics.
2024;13(4):509-518. doi:10.1515/nanoph-2023-0556
apa: Schneider, T., Gao, W., Zentgraf, T., Schumacher, S., & Ma, X. (2024).
Topological edge and corner states in coupled wave lattices in nonlinear polariton
condensates. Nanophotonics, 13(4), 509–518. https://doi.org/10.1515/nanoph-2023-0556
bibtex: '@article{Schneider_Gao_Zentgraf_Schumacher_Ma_2024, title={Topological
edge and corner states in coupled wave lattices in nonlinear polariton condensates},
volume={13}, DOI={10.1515/nanoph-2023-0556},
number={4}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Schneider,
Tobias and Gao, Wenlong and Zentgraf, Thomas and Schumacher, Stefan and Ma, Xuekai},
year={2024}, pages={509–518} }'
chicago: 'Schneider, Tobias, Wenlong Gao, Thomas Zentgraf, Stefan Schumacher, and
Xuekai Ma. “Topological Edge and Corner States in Coupled Wave Lattices in Nonlinear
Polariton Condensates.” Nanophotonics 13, no. 4 (2024): 509–18. https://doi.org/10.1515/nanoph-2023-0556.'
ieee: 'T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, and X. Ma, “Topological
edge and corner states in coupled wave lattices in nonlinear polariton condensates,”
Nanophotonics, vol. 13, no. 4, pp. 509–518, 2024, doi: 10.1515/nanoph-2023-0556.'
mla: Schneider, Tobias, et al. “Topological Edge and Corner States in Coupled Wave
Lattices in Nonlinear Polariton Condensates.” Nanophotonics, vol. 13, no.
4, Walter de Gruyter GmbH, 2024, pp. 509–18, doi:10.1515/nanoph-2023-0556.
short: T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, X. Ma, Nanophotonics 13
(2024) 509–518.
date_created: 2025-09-12T11:19:22Z
date_updated: 2025-09-12T11:22:41Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1515/nanoph-2023-0556
intvolume: ' 13'
issue: '4'
language:
- iso: eng
page: 509-518
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '55'
name: TRR 142 - Project Area B
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
- _id: '170'
name: 'TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage
der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen'
publication: Nanophotonics
publication_identifier:
issn:
- 2192-8614
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Topological edge and corner states in coupled wave lattices in nonlinear polariton
condensates
type: journal_article
user_id: '16199'
volume: 13
year: '2024'
...
---
_id: '61257'
abstract:
- lang: eng
text: "Exceptional points (EPs), with their intriguing spectral topology,
have attracted considerable attention in a broad range of physical systems, with
potential sensing applications driving much of the present research in this field.
Here, we investigate spectral topology and EPs in systems with significant nonlinearity,
exemplified by a nonequilibrium exciton-polariton condensate. With the possibility
to control loss and gain and nonlinearity by optical means, this system allows
for a comprehensive analysis of the interplay of nonlinearities (Kerr type and
saturable gain) and non-Hermiticity. Not only do we find that EPs can be intentionally
shifted in parameter space by the saturable gain, but we also observe intriguing
rotations and intersections of Riemann surfaces and find nonlinearity-enhanced
sensing capabilities. With this, our results illustrate the potential of tailoring
spectral topology and related phenomena in non-Hermitian systems by nonlinearity.\r\n
\ \r\n \r\n \r\n
\ \r\n Published
by the American Physical Society\r\n 2024\r\n
\ \r\n \r\n
\ "
article_number: '013148'
author:
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
citation:
ama: Wingenbach J, Schumacher S, Ma X. Manipulating spectral topology and exceptional
points by nonlinearity in non-Hermitian polariton systems. Physical Review
Research. 2024;6(1). doi:10.1103/physrevresearch.6.013148
apa: Wingenbach, J., Schumacher, S., & Ma, X. (2024). Manipulating spectral
topology and exceptional points by nonlinearity in non-Hermitian polariton systems.
Physical Review Research, 6(1), Article 013148. https://doi.org/10.1103/physrevresearch.6.013148
bibtex: '@article{Wingenbach_Schumacher_Ma_2024, title={Manipulating spectral topology
and exceptional points by nonlinearity in non-Hermitian polariton systems}, volume={6},
DOI={10.1103/physrevresearch.6.013148},
number={1013148}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai},
year={2024} }'
chicago: Wingenbach, Jan, Stefan Schumacher, and Xuekai Ma. “Manipulating Spectral
Topology and Exceptional Points by Nonlinearity in Non-Hermitian Polariton Systems.”
Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.013148.
ieee: 'J. Wingenbach, S. Schumacher, and X. Ma, “Manipulating spectral topology
and exceptional points by nonlinearity in non-Hermitian polariton systems,” Physical
Review Research, vol. 6, no. 1, Art. no. 013148, 2024, doi: 10.1103/physrevresearch.6.013148.'
mla: Wingenbach, Jan, et al. “Manipulating Spectral Topology and Exceptional Points
by Nonlinearity in Non-Hermitian Polariton Systems.” Physical Review Research,
vol. 6, no. 1, 013148, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.013148.
short: J. Wingenbach, S. Schumacher, X. Ma, Physical Review Research 6 (2024).
date_created: 2025-09-12T11:23:33Z
date_updated: 2025-09-12T11:24:59Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
doi: 10.1103/physrevresearch.6.013148
intvolume: ' 6'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian
polariton systems
type: journal_article
user_id: '16199'
volume: 6
year: '2024'
...
---
_id: '61259'
author:
- first_name: Fabian
full_name: Bauch, Fabian
last_name: Bauch
- first_name: Chuan-Ding
full_name: Dong, Chuan-Ding
last_name: Dong
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch F, Dong C-D, Schumacher S. Dynamics of Electron–Hole Coulomb Attractive
Energy and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers. The Journal
of Physical Chemistry C. 2024;128(8):3525-3532. doi:10.1021/acs.jpcc.3c07513
apa: Bauch, F., Dong, C.-D., & Schumacher, S. (2024). Dynamics of Electron–Hole
Coulomb Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor
Polymers. The Journal of Physical Chemistry C, 128(8), 3525–3532.
https://doi.org/10.1021/acs.jpcc.3c07513
bibtex: '@article{Bauch_Dong_Schumacher_2024, title={Dynamics of Electron–Hole Coulomb
Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers},
volume={128}, DOI={10.1021/acs.jpcc.3c07513},
number={8}, journal={The Journal of Physical Chemistry C}, publisher={American
Chemical Society (ACS)}, author={Bauch, Fabian and Dong, Chuan-Ding and Schumacher,
Stefan}, year={2024}, pages={3525–3532} }'
chicago: 'Bauch, Fabian, Chuan-Ding Dong, and Stefan Schumacher. “Dynamics of Electron–Hole
Coulomb Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor
Polymers.” The Journal of Physical Chemistry C 128, no. 8 (2024): 3525–32.
https://doi.org/10.1021/acs.jpcc.3c07513.'
ieee: 'F. Bauch, C.-D. Dong, and S. Schumacher, “Dynamics of Electron–Hole Coulomb
Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers,”
The Journal of Physical Chemistry C, vol. 128, no. 8, pp. 3525–3532, 2024,
doi: 10.1021/acs.jpcc.3c07513.'
mla: Bauch, Fabian, et al. “Dynamics of Electron–Hole Coulomb Attractive Energy
and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers.” The Journal
of Physical Chemistry C, vol. 128, no. 8, American Chemical Society (ACS),
2024, pp. 3525–32, doi:10.1021/acs.jpcc.3c07513.
short: F. Bauch, C.-D. Dong, S. Schumacher, The Journal of Physical Chemistry C
128 (2024) 3525–3532.
date_created: 2025-09-12T11:26:49Z
date_updated: 2025-09-12T11:27:57Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1021/acs.jpcc.3c07513
intvolume: ' 128'
issue: '8'
language:
- iso: eng
page: 3525-3532
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Dynamics of Electron–Hole Coulomb Attractive Energy and Dipole Moment of Hot
Excitons in Donor–Acceptor Polymers
type: journal_article
user_id: '16199'
volume: 128
year: '2024'
...
---
_id: '61263'
abstract:
- lang: eng
text: Charge transfer mechanism in the deprotonation-induced n-type doping
of PCBM.
author:
- first_name: Chuan-Ding
full_name: Dong, Chuan-Ding
last_name: Dong
- first_name: Fabian
full_name: Bauch, Fabian
id: '61389'
last_name: Bauch
orcid: 0009-0008-6279-077X
- first_name: Yuanyuan
full_name: Hu, Yuanyuan
last_name: Hu
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Dong C-D, Bauch F, Hu Y, Schumacher S. Charge transfer in superbase n-type
doping of PCBM induced by deprotonation. Physical Chemistry Chemical Physics.
2024;26(5):4194-4199. doi:10.1039/d3cp05105f
apa: Dong, C.-D., Bauch, F., Hu, Y., & Schumacher, S. (2024). Charge transfer
in superbase n-type doping of PCBM induced by deprotonation. Physical Chemistry
Chemical Physics, 26(5), 4194–4199. https://doi.org/10.1039/d3cp05105f
bibtex: '@article{Dong_Bauch_Hu_Schumacher_2024, title={Charge transfer in superbase
n-type doping of PCBM induced by deprotonation}, volume={26}, DOI={10.1039/d3cp05105f},
number={5}, journal={Physical Chemistry Chemical Physics}, publisher={Royal Society
of Chemistry (RSC)}, author={Dong, Chuan-Ding and Bauch, Fabian and Hu, Yuanyuan
and Schumacher, Stefan}, year={2024}, pages={4194–4199} }'
chicago: 'Dong, Chuan-Ding, Fabian Bauch, Yuanyuan Hu, and Stefan Schumacher. “Charge
Transfer in Superbase N-Type Doping of PCBM Induced by Deprotonation.” Physical
Chemistry Chemical Physics 26, no. 5 (2024): 4194–99. https://doi.org/10.1039/d3cp05105f.'
ieee: 'C.-D. Dong, F. Bauch, Y. Hu, and S. Schumacher, “Charge transfer in superbase
n-type doping of PCBM induced by deprotonation,” Physical Chemistry Chemical
Physics, vol. 26, no. 5, pp. 4194–4199, 2024, doi: 10.1039/d3cp05105f.'
mla: Dong, Chuan-Ding, et al. “Charge Transfer in Superbase N-Type Doping of PCBM
Induced by Deprotonation.” Physical Chemistry Chemical Physics, vol. 26,
no. 5, Royal Society of Chemistry (RSC), 2024, pp. 4194–99, doi:10.1039/d3cp05105f.
short: C.-D. Dong, F. Bauch, Y. Hu, S. Schumacher, Physical Chemistry Chemical Physics
26 (2024) 4194–4199.
date_created: 2025-09-12T11:29:33Z
date_updated: 2025-09-12T11:30:40Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '230'
- _id: '27'
doi: 10.1039/d3cp05105f
intvolume: ' 26'
issue: '5'
language:
- iso: eng
page: 4194-4199
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Physical Chemistry Chemical Physics
publication_identifier:
issn:
- 1463-9076
- 1463-9084
publication_status: published
publisher: Royal Society of Chemistry (RSC)
status: public
title: Charge transfer in superbase n-type doping of PCBM induced by deprotonation
type: journal_article
user_id: '16199'
volume: 26
year: '2024'
...
---
_id: '61357'
author:
- first_name: Marvin
full_name: Krenz, Marvin
last_name: Krenz
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
citation:
ama: Krenz M, Sanna S, Gerstmann U, Schmidt WG. Understanding and Improving Triplet
Exciton Transfer in Sensitized Silicon Solar Cells. The Journal of Physical
Chemistry C. 2024;128(41):17774-17778. doi:10.1021/acs.jpcc.4c05446
apa: Krenz, M., Sanna, S., Gerstmann, U., & Schmidt, W. G. (2024). Understanding
and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells. The
Journal of Physical Chemistry C, 128(41), 17774–17778. https://doi.org/10.1021/acs.jpcc.4c05446
bibtex: '@article{Krenz_Sanna_Gerstmann_Schmidt_2024, title={Understanding and Improving
Triplet Exciton Transfer in Sensitized Silicon Solar Cells}, volume={128}, DOI={10.1021/acs.jpcc.4c05446},
number={41}, journal={The Journal of Physical Chemistry C}, publisher={American
Chemical Society (ACS)}, author={Krenz, Marvin and Sanna, Simone and Gerstmann,
Uwe and Schmidt, Wolf Gero}, year={2024}, pages={17774–17778} }'
chicago: 'Krenz, Marvin, Simone Sanna, Uwe Gerstmann, and Wolf Gero Schmidt. “Understanding
and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells.” The
Journal of Physical Chemistry C 128, no. 41 (2024): 17774–78. https://doi.org/10.1021/acs.jpcc.4c05446.'
ieee: 'M. Krenz, S. Sanna, U. Gerstmann, and W. G. Schmidt, “Understanding and Improving
Triplet Exciton Transfer in Sensitized Silicon Solar Cells,” The Journal of
Physical Chemistry C, vol. 128, no. 41, pp. 17774–17778, 2024, doi: 10.1021/acs.jpcc.4c05446.'
mla: Krenz, Marvin, et al. “Understanding and Improving Triplet Exciton Transfer
in Sensitized Silicon Solar Cells.” The Journal of Physical Chemistry C,
vol. 128, no. 41, American Chemical Society (ACS), 2024, pp. 17774–78, doi:10.1021/acs.jpcc.4c05446.
short: M. Krenz, S. Sanna, U. Gerstmann, W.G. Schmidt, The Journal of Physical Chemistry
C 128 (2024) 17774–17778.
date_created: 2025-09-18T11:32:33Z
date_updated: 2025-09-18T11:34:21Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '230'
- _id: '429'
- _id: '35'
- _id: '27'
doi: 10.1021/acs.jpcc.4c05446
intvolume: ' 128'
issue: '41'
language:
- iso: eng
page: 17774-17778
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '55'
name: TRR 142 - Project Area B
- _id: '166'
name: TRR 142 - Subproject A11
- _id: '168'
name: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat
(B07*)
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon
Solar Cells
type: journal_article
user_id: '16199'
volume: 128
year: '2024'
...
---
_id: '62067'
abstract:
- lang: eng
text: Most FPGA boards in the HPC domain are well-suited for parallel scaling because
of the direct integration of versatile and high-throughput network ports. However,
the utilization of their network capabilities is often challenging and error-prone
because the whole network stack and communication patterns have to be implemented
and managed on the FPGAs. Also, this approach conceptually involves a trade-off
between the performance potential of improved communication and the impact of
resource consumption for communication infrastructure, since the utilized resources
on the FPGAs could otherwise be used for computations. In this work, we investigate
this trade-off, firstly, by using synthetic benchmarks to evaluate the different
configuration options of the communication framework ACCL and their impact on
communication latency and throughput. Finally, we use our findings to implement
a shallow water simulation whose scalability heavily depends on low-latency communication.
With a suitable configuration of ACCL, good scaling behavior can be shown to all
48 FPGAs installed in the system. Overall, the results show that the availability
of inter-FPGA communication frameworks as well as the configurability of framework and
network stack are crucial to achieve the best application performance with low
latency communication.
author:
- first_name: Marius
full_name: Meyer, Marius
id: '40778'
last_name: Meyer
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Lucian
full_name: Petrica, Lucian
last_name: Petrica
- first_name: Kenneth
full_name: O’Brien, Kenneth
last_name: O’Brien
- first_name: Michaela
full_name: Blott, Michaela
last_name: Blott
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
ama: 'Meyer M, Kenter T, Petrica L, O’Brien K, Blott M, Plessl C. Optimizing Communication
for Latency Sensitive HPC Applications on up to 48 FPGAs Using ACCL. In: Lecture
Notes in Computer Science. Springer Nature Switzerland; 2024. doi:10.1007/978-3-031-69766-1_9'
apa: Meyer, M., Kenter, T., Petrica, L., O’Brien, K., Blott, M., & Plessl, C.
(2024). Optimizing Communication for Latency Sensitive HPC Applications on up
to 48 FPGAs Using ACCL. In Lecture Notes in Computer Science. Springer
Nature Switzerland. https://doi.org/10.1007/978-3-031-69766-1_9
bibtex: '@inbook{Meyer_Kenter_Petrica_O’Brien_Blott_Plessl_2024, place={Cham}, title={Optimizing
Communication for Latency Sensitive HPC Applications on up to 48 FPGAs Using ACCL},
DOI={10.1007/978-3-031-69766-1_9},
booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland},
author={Meyer, Marius and Kenter, Tobias and Petrica, Lucian and O’Brien, Kenneth
and Blott, Michaela and Plessl, Christian}, year={2024} }'
chicago: 'Meyer, Marius, Tobias Kenter, Lucian Petrica, Kenneth O’Brien, Michaela
Blott, and Christian Plessl. “Optimizing Communication for Latency Sensitive HPC
Applications on up to 48 FPGAs Using ACCL.” In Lecture Notes in Computer Science.
Cham: Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-69766-1_9.'
ieee: 'M. Meyer, T. Kenter, L. Petrica, K. O’Brien, M. Blott, and C. Plessl, “Optimizing
Communication for Latency Sensitive HPC Applications on up to 48 FPGAs Using ACCL,”
in Lecture Notes in Computer Science, Cham: Springer Nature Switzerland,
2024.'
mla: Meyer, Marius, et al. “Optimizing Communication for Latency Sensitive HPC Applications
on up to 48 FPGAs Using ACCL.” Lecture Notes in Computer Science, Springer
Nature Switzerland, 2024, doi:10.1007/978-3-031-69766-1_9.
short: 'M. Meyer, T. Kenter, L. Petrica, K. O’Brien, M. Blott, C. Plessl, in: Lecture
Notes in Computer Science, Springer Nature Switzerland, Cham, 2024.'
date_created: 2025-11-04T09:50:24Z
date_updated: 2025-11-04T09:51:22Z
department:
- _id: '27'
- _id: '518'
doi: 10.1007/978-3-031-69766-1_9
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
place: Cham
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783031697654'
- '9783031697661'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature Switzerland
quality_controlled: '1'
status: public
title: Optimizing Communication for Latency Sensitive HPC Applications on up to 48
FPGAs Using ACCL
type: book_chapter
user_id: '3145'
year: '2024'
...
---
_id: '56604'
abstract:
- lang: eng
text: This manuscript makes the claim of having computed the 9th Dedekind number,
D(9). This was done by accelerating the core operation of the process with an
efficient FPGA design that outperforms an optimized 64-core CPU reference by 95x.
The FPGA execution was parallelized on the Noctua 2 supercomputer at Paderborn
University. The resulting value for D(9) is 286386577668298411128469151667598498812366.
This value can be verified in two steps. We have made the data file containing
the 490 M results available, each of which can be verified separately on CPU,
and the whole file sums to our proposed value. The paper explains the mathematical
approach in the first part, before putting the focus on a deep dive into the FPGA
accelerator implementation followed by a performance analysis. The FPGA implementation
was done in Register-Transfer Level using a dual-clock architecture and shows
how we achieved an impressive FMax of 450 MHz on the targeted Stratix 10 GX 2,800
FPGAs. The total compute time used was 47,000 FPGA hours.
author:
- first_name: Lennart
full_name: Van Hirtum, Lennart
id: '100210'
last_name: Van Hirtum
- first_name: Patrick
full_name: De Causmaecker, Patrick
last_name: De Causmaecker
- first_name: Jens
full_name: Goemaere, Jens
last_name: Goemaere
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Heinrich
full_name: Riebler, Heinrich
id: '8961'
last_name: Riebler
- first_name: Michael
full_name: Lass, Michael
id: '24135'
last_name: Lass
orcid: 0000-0002-5708-7632
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
ama: Van Hirtum L, De Causmaecker P, Goemaere J, et al. A Computation of the Ninth
Dedekind Number Using FPGA Supercomputing. ACM Transactions on Reconfigurable
Technology and Systems. 2024;17(3):1-28. doi:10.1145/3674147
apa: Van Hirtum, L., De Causmaecker, P., Goemaere, J., Kenter, T., Riebler, H.,
Lass, M., & Plessl, C. (2024). A Computation of the Ninth Dedekind Number
Using FPGA Supercomputing. ACM Transactions on Reconfigurable Technology and
Systems, 17(3), 1–28. https://doi.org/10.1145/3674147
bibtex: '@article{Van Hirtum_De Causmaecker_Goemaere_Kenter_Riebler_Lass_Plessl_2024,
title={A Computation of the Ninth Dedekind Number Using FPGA Supercomputing},
volume={17}, DOI={10.1145/3674147},
number={3}, journal={ACM Transactions on Reconfigurable Technology and Systems},
publisher={Association for Computing Machinery (ACM)}, author={Van Hirtum, Lennart
and De Causmaecker, Patrick and Goemaere, Jens and Kenter, Tobias and Riebler,
Heinrich and Lass, Michael and Plessl, Christian}, year={2024}, pages={1–28} }'
chicago: 'Van Hirtum, Lennart, Patrick De Causmaecker, Jens Goemaere, Tobias Kenter,
Heinrich Riebler, Michael Lass, and Christian Plessl. “A Computation of the Ninth
Dedekind Number Using FPGA Supercomputing.” ACM Transactions on Reconfigurable
Technology and Systems 17, no. 3 (2024): 1–28. https://doi.org/10.1145/3674147.'
ieee: 'L. Van Hirtum et al., “A Computation of the Ninth Dedekind Number
Using FPGA Supercomputing,” ACM Transactions on Reconfigurable Technology and
Systems, vol. 17, no. 3, pp. 1–28, 2024, doi: 10.1145/3674147.'
mla: Van Hirtum, Lennart, et al. “A Computation of the Ninth Dedekind Number Using
FPGA Supercomputing.” ACM Transactions on Reconfigurable Technology and Systems,
vol. 17, no. 3, Association for Computing Machinery (ACM), 2024, pp. 1–28, doi:10.1145/3674147.
short: L. Van Hirtum, P. De Causmaecker, J. Goemaere, T. Kenter, H. Riebler, M.
Lass, C. Plessl, ACM Transactions on Reconfigurable Technology and Systems 17
(2024) 1–28.
date_created: 2024-10-14T07:38:29Z
date_updated: 2025-11-04T09:53:26Z
department:
- _id: '27'
- _id: '518'
doi: 10.1145/3674147
intvolume: ' 17'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
page: 1-28
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: ACM Transactions on Reconfigurable Technology and Systems
publication_identifier:
issn:
- 1936-7406
- 1936-7414
publication_status: published
publisher: Association for Computing Machinery (ACM)
quality_controlled: '1'
status: public
title: A Computation of the Ninth Dedekind Number Using FPGA Supercomputing
type: journal_article
user_id: '3145'
volume: 17
year: '2024'
...