---
_id: '63656'
article_number: '012220'
article_type: original
author:
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Julien
full_name: Pinske, Julien
last_name: Pinske
- first_name: Benjamin
full_name: Hinrichs, Benjamin
id: '99427'
last_name: Hinrichs
orcid: 0000-0001-9074-1205
- first_name: Martin
full_name: Kolb, Martin
id: '48880'
last_name: Kolb
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: Ares L, Pinske J, Hinrichs B, Kolb M, Sperling J. Restricted Monte Carlo wave-function
method and Lindblad equation for identifying entangling open-quantum-system dynamics.
Physical Review A. 2026;113(1). doi:10.1103/hcj7-8zlg
apa: Ares, L., Pinske, J., Hinrichs, B., Kolb, M., & Sperling, J. (2026). Restricted
Monte Carlo wave-function method and Lindblad equation for identifying entangling
open-quantum-system dynamics. Physical Review A, 113(1), Article
012220. https://doi.org/10.1103/hcj7-8zlg
bibtex: '@article{Ares_Pinske_Hinrichs_Kolb_Sperling_2026, title={Restricted Monte
Carlo wave-function method and Lindblad equation for identifying entangling open-quantum-system
dynamics}, volume={113}, DOI={10.1103/hcj7-8zlg},
number={1012220}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Ares, Laura and Pinske, Julien and Hinrichs, Benjamin and Kolb,
Martin and Sperling, Jan}, year={2026} }'
chicago: Ares, Laura, Julien Pinske, Benjamin Hinrichs, Martin Kolb, and Jan Sperling.
“Restricted Monte Carlo Wave-Function Method and Lindblad Equation for Identifying
Entangling Open-Quantum-System Dynamics.” Physical Review A 113, no. 1
(2026). https://doi.org/10.1103/hcj7-8zlg.
ieee: 'L. Ares, J. Pinske, B. Hinrichs, M. Kolb, and J. Sperling, “Restricted Monte
Carlo wave-function method and Lindblad equation for identifying entangling open-quantum-system
dynamics,” Physical Review A, vol. 113, no. 1, Art. no. 012220, 2026, doi:
10.1103/hcj7-8zlg.'
mla: Ares, Laura, et al. “Restricted Monte Carlo Wave-Function Method and Lindblad
Equation for Identifying Entangling Open-Quantum-System Dynamics.” Physical
Review A, vol. 113, no. 1, 012220, American Physical Society (APS), 2026,
doi:10.1103/hcj7-8zlg.
short: L. Ares, J. Pinske, B. Hinrichs, M. Kolb, J. Sperling, Physical Review A
113 (2026).
date_created: 2026-01-18T18:08:18Z
date_updated: 2026-01-18T18:15:01Z
department:
- _id: '799'
doi: 10.1103/hcj7-8zlg
external_id:
arxiv:
- '2412.08735'
intvolume: ' 113'
issue: '1'
language:
- iso: eng
project:
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Restricted Monte Carlo wave-function method and Lindblad equation for identifying
entangling open-quantum-system dynamics
type: journal_article
user_id: '99427'
volume: 113
year: '2026'
...
---
_id: '63657'
article_number: L010403
article_type: letter_note
author:
- first_name: Julien
full_name: Pinske, Julien
last_name: Pinske
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Benjamin
full_name: Hinrichs, Benjamin
id: '99427'
last_name: Hinrichs
orcid: 0000-0001-9074-1205
- first_name: Martin
full_name: Kolb, Martin
id: '48880'
last_name: Kolb
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: Pinske J, Ares L, Hinrichs B, Kolb M, Sperling J. Separability Lindblad equation for
dynamical open-system entanglement. Physical Review A. 2026;113(1). doi:10.1103/kd3b-bfxq
apa: Pinske, J., Ares, L., Hinrichs, B., Kolb, M., & Sperling, J. (2026). Separability
Lindblad equation for dynamical open-system entanglement. Physical Review A,
113(1), Article L010403. https://doi.org/10.1103/kd3b-bfxq
bibtex: '@article{Pinske_Ares_Hinrichs_Kolb_Sperling_2026, title={Separability Lindblad
equation for dynamical open-system entanglement}, volume={113}, DOI={10.1103/kd3b-bfxq},
number={1L010403}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Pinske, Julien and Ares, Laura and Hinrichs, Benjamin and Kolb,
Martin and Sperling, Jan}, year={2026} }'
chicago: Pinske, Julien, Laura Ares, Benjamin Hinrichs, Martin Kolb, and Jan Sperling.
“Separability Lindblad Equation for Dynamical Open-System Entanglement.” Physical
Review A 113, no. 1 (2026). https://doi.org/10.1103/kd3b-bfxq.
ieee: 'J. Pinske, L. Ares, B. Hinrichs, M. Kolb, and J. Sperling, “Separability
Lindblad equation for dynamical open-system entanglement,” Physical Review
A, vol. 113, no. 1, Art. no. L010403, 2026, doi: 10.1103/kd3b-bfxq.'
mla: Pinske, Julien, et al. “Separability Lindblad Equation for Dynamical Open-System
Entanglement.” Physical Review A, vol. 113, no. 1, L010403, American Physical
Society (APS), 2026, doi:10.1103/kd3b-bfxq.
short: J. Pinske, L. Ares, B. Hinrichs, M. Kolb, J. Sperling, Physical Review A
113 (2026).
date_created: 2026-01-18T18:11:27Z
date_updated: 2026-01-18T18:15:26Z
department:
- _id: '799'
doi: 10.1103/kd3b-bfxq
external_id:
arxiv:
- '2412.08724'
intvolume: ' 113'
issue: '1'
language:
- iso: eng
project:
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Separability Lindblad equation for dynamical open-system entanglement
type: journal_article
user_id: '99427'
volume: 113
year: '2026'
...
---
_id: '64877'
author:
- first_name: Behnood
full_name: Taheri, Behnood
last_name: Taheri
- first_name: Denis
full_name: Kopylov, Denis
id: '98502'
last_name: Kopylov
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
citation:
ama: Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced
spectral non-degeneracy in type-II parametric down-conversion. arXiv. Published
online 2026. doi:10.48550/ARXIV.2603.01656
apa: Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., & Sharapova,
P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion.
ArXiv. https://doi.org/10.48550/ARXIV.2603.01656
bibtex: '@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced
spectral non-degeneracy in type-II parametric down-conversion}, DOI={10.48550/ARXIV.2603.01656},
journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred
and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }'
chicago: Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner,
and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric
down-Conversion.” ArXiv, 2026. https://doi.org/10.48550/ARXIV.2603.01656.
ieee: 'B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova,
“Gain-induced spectral non-degeneracy in type-II parametric down-conversion,”
arXiv, 2026, doi: 10.48550/ARXIV.2603.01656.'
mla: Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric
down-Conversion.” ArXiv, 2026, doi:10.48550/ARXIV.2603.01656.
short: B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova,
ArXiv (2026).
date_created: 2026-03-10T15:37:22Z
date_updated: 2026-03-10T15:41:18Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '34'
- _id: '61'
- _id: '230'
- _id: '623'
- _id: '429'
doi: 10.48550/ARXIV.2603.01656
language:
- iso: eng
project:
- _id: '168'
name: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat
(B07*)
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
publication: arXiv
status: public
title: Gain-induced spectral non-degeneracy in type-II parametric down-conversion
type: journal_article
user_id: '16199'
year: '2026'
...
---
_id: '63744'
abstract:
- lang: eng
text: Orbital angular momentum (OAM) modes are an important resource used in various
branches of quantum science and technology due to their unique helical structure
and countably infinite basis. Generating light that simultaneously carries high-order
orbital angular momenta and exhibits quantum correlations is a challenging task.
In this work, we present a theoretical approach to the generation of correlated
Schmidt modes carrying OAM via parametric down-conversion (PDC) in cascaded nonlinear
systems (nonlinear interferometers) pumped by Laguerre–Gaussian beams. We demonstrate
how the number of generated modes and their population can be controlled by varying
the pump parameters, the gain of the PDC process, and the distance between the
crystals. We investigate the angular displacement measurement uncertainty of these
interferometers and demonstrate that it can overcome the classical shot noise
limit.
article_number: '016112'
article_type: original
author:
- first_name: Dennis
full_name: Scharwald, Dennis
id: '55907'
last_name: Scharwald
orcid: 0009-0007-5654-5412
- first_name: Lucas
full_name: Gehse, Lucas
last_name: Gehse
- first_name: Polina
full_name: Sharapova, Polina
id: '60286'
last_name: Sharapova
citation:
ama: Scharwald D, Gehse L, Sharapova P. Schmidt modes carrying orbital angular momentum
generated by cascaded systems pumped with Laguerre–Gaussian beams. APL Photonics.
2025;10(1). doi:10.1063/5.0229802
apa: Scharwald, D., Gehse, L., & Sharapova, P. (2025). Schmidt modes carrying
orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian
beams. APL Photonics, 10(1), Article 016112. https://doi.org/10.1063/5.0229802
bibtex: '@article{Scharwald_Gehse_Sharapova_2025, title={Schmidt modes carrying
orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian
beams}, volume={10}, DOI={10.1063/5.0229802},
number={1016112}, journal={APL Photonics}, publisher={AIP Publishing}, author={Scharwald,
Dennis and Gehse, Lucas and Sharapova, Polina}, year={2025} }'
chicago: Scharwald, Dennis, Lucas Gehse, and Polina Sharapova. “Schmidt Modes Carrying
Orbital Angular Momentum Generated by Cascaded Systems Pumped with Laguerre–Gaussian
Beams.” APL Photonics 10, no. 1 (2025). https://doi.org/10.1063/5.0229802.
ieee: 'D. Scharwald, L. Gehse, and P. Sharapova, “Schmidt modes carrying orbital
angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams,”
APL Photonics, vol. 10, no. 1, Art. no. 016112, 2025, doi: 10.1063/5.0229802.'
mla: Scharwald, Dennis, et al. “Schmidt Modes Carrying Orbital Angular Momentum
Generated by Cascaded Systems Pumped with Laguerre–Gaussian Beams.” APL Photonics,
vol. 10, no. 1, 016112, AIP Publishing, 2025, doi:10.1063/5.0229802.
short: D. Scharwald, L. Gehse, P. Sharapova, APL Photonics 10 (2025).
date_created: 2026-01-26T15:48:54Z
date_updated: 2026-02-01T13:19:20Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '35'
- _id: '429'
doi: 10.1063/5.0229802
intvolume: ' 10'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://pubs.aip.org/aip/app/article-pdf/doi/10.1063/5.0229802/20352749/016112_1_5.0229802.pdf
oa: '1'
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: APL Photonics
publication_identifier:
issn:
- 2378-0967
publication_status: published
publisher: AIP Publishing
status: public
title: Schmidt modes carrying orbital angular momentum generated by cascaded systems
pumped with Laguerre–Gaussian beams
type: journal_article
user_id: '55907'
volume: 10
year: '2025'
...
---
_id: '63745'
abstract:
- lang: eng
text: Multimode squeezed light is an increasingly popular tool in photonic quantum
technologies, including sensing, imaging, and computation. Meanwhile, the existing
methods of its characterization are technically complicated, which reduces the
level of squeezing, and mostly deal with a single mode at a time. Here, for the
first time, to the best of our knowledge, we employ optical parametric amplification
to characterize multiple squeezing eigenmodes simultaneously. We retrieve the
shapes and squeezing degrees of all modes at once through direct detection followed
by modal decomposition. This method is tolerant to inefficient detection and does
not require a local oscillator. For a spectrally and spatially multimode squeezed
vacuum, we characterize eight strongest spatial modes, obtaining squeezing and
anti-squeezing values of up to −5.2 ± 0.2 dB and 8.6 ± 0.3 dB, respectively, despite
the 50% detection loss. This work, being the first exploration of an optical parametric
amplifier’s multimode capability for squeezing detection, paves the way for the
real-time detection of multimode squeezing.
article_number: '36'
article_type: original
author:
- first_name: Ismail
full_name: Barakat, Ismail
last_name: Barakat
- first_name: Mahmoud
full_name: Kalash, Mahmoud
last_name: Kalash
- first_name: Dennis
full_name: Scharwald, Dennis
id: '55907'
last_name: Scharwald
orcid: 0009-0007-5654-5412
- first_name: Polina
full_name: Sharapova, Polina
id: '60286'
last_name: Sharapova
- first_name: Norbert
full_name: Lindlein, Norbert
last_name: Lindlein
- first_name: Maria
full_name: Chekhova, Maria
last_name: Chekhova
citation:
ama: Barakat I, Kalash M, Scharwald D, Sharapova P, Lindlein N, Chekhova M. Simultaneous
measurement of multimode squeezing through multimode phase-sensitive amplification.
Optica Quantum. 2025;3(1). doi:10.1364/opticaq.524682
apa: Barakat, I., Kalash, M., Scharwald, D., Sharapova, P., Lindlein, N., &
Chekhova, M. (2025). Simultaneous measurement of multimode squeezing through multimode
phase-sensitive amplification. Optica Quantum, 3(1), Article 36.
https://doi.org/10.1364/opticaq.524682
bibtex: '@article{Barakat_Kalash_Scharwald_Sharapova_Lindlein_Chekhova_2025, title={Simultaneous
measurement of multimode squeezing through multimode phase-sensitive amplification},
volume={3}, DOI={10.1364/opticaq.524682},
number={136}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Barakat,
Ismail and Kalash, Mahmoud and Scharwald, Dennis and Sharapova, Polina and Lindlein,
Norbert and Chekhova, Maria}, year={2025} }'
chicago: Barakat, Ismail, Mahmoud Kalash, Dennis Scharwald, Polina Sharapova, Norbert
Lindlein, and Maria Chekhova. “Simultaneous Measurement of Multimode Squeezing
through Multimode Phase-Sensitive Amplification.” Optica Quantum 3, no.
1 (2025). https://doi.org/10.1364/opticaq.524682.
ieee: 'I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, and M. Chekhova,
“Simultaneous measurement of multimode squeezing through multimode phase-sensitive
amplification,” Optica Quantum, vol. 3, no. 1, Art. no. 36, 2025, doi:
10.1364/opticaq.524682.'
mla: Barakat, Ismail, et al. “Simultaneous Measurement of Multimode Squeezing through
Multimode Phase-Sensitive Amplification.” Optica Quantum, vol. 3, no. 1,
36, Optica Publishing Group, 2025, doi:10.1364/opticaq.524682.
short: I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, M. Chekhova,
Optica Quantum 3 (2025).
date_created: 2026-01-26T15:57:13Z
date_updated: 2026-02-10T22:44:44Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '35'
- _id: '429'
doi: 10.1364/opticaq.524682
intvolume: ' 3'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://opg.optica.org/opticaq/viewmedia.cfm?uri=opticaq-3-1-36&seq=0
oa: '1'
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Optica Quantum
publication_identifier:
issn:
- 2837-6714
publication_status: published
publisher: Optica Publishing Group
status: public
title: Simultaneous measurement of multimode squeezing through multimode phase-sensitive
amplification
type: journal_article
user_id: '55907'
volume: 3
year: '2025'
...
---
_id: '61245'
article_number: '032404'
author:
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Laura
full_name: Ares Santos, Laura
last_name: Ares Santos
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: 'Barkhausen F, Ares Santos L, Schumacher S, Sperling J. Entanglement between
dependent degrees of freedom: Quasiparticle correlations. Physical Review A.
2025;111(3). doi:10.1103/physreva.111.032404'
apa: 'Barkhausen, F., Ares Santos, L., Schumacher, S., & Sperling, J. (2025).
Entanglement between dependent degrees of freedom: Quasiparticle correlations.
Physical Review A, 111(3), Article 032404. https://doi.org/10.1103/physreva.111.032404'
bibtex: '@article{Barkhausen_Ares Santos_Schumacher_Sperling_2025, title={Entanglement
between dependent degrees of freedom: Quasiparticle correlations}, volume={111},
DOI={10.1103/physreva.111.032404},
number={3032404}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan
and Sperling, Jan}, year={2025} }'
chicago: 'Barkhausen, Franziska, Laura Ares Santos, Stefan Schumacher, and Jan Sperling.
“Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.”
Physical Review A 111, no. 3 (2025). https://doi.org/10.1103/physreva.111.032404.'
ieee: 'F. Barkhausen, L. Ares Santos, S. Schumacher, and J. Sperling, “Entanglement
between dependent degrees of freedom: Quasiparticle correlations,” Physical
Review A, vol. 111, no. 3, Art. no. 032404, 2025, doi: 10.1103/physreva.111.032404.'
mla: 'Barkhausen, Franziska, et al. “Entanglement between Dependent Degrees of Freedom:
Quasiparticle Correlations.” Physical Review A, vol. 111, no. 3, 032404,
American Physical Society (APS), 2025, doi:10.1103/physreva.111.032404.'
short: F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review
A 111 (2025).
date_created: 2025-09-12T10:37:34Z
date_updated: 2025-09-12T10:42:16Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '35'
- _id: '230'
- _id: '623'
- _id: '429'
doi: 10.1103/physreva.111.032404
intvolume: ' 111'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '56'
name: TRR 142 - Project Area C
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Entanglement between dependent degrees of freedom: Quasiparticle correlations'
type: journal_article
user_id: '16199'
volume: 111
year: '2025'
...
---
_id: '62911'
abstract:
- lang: eng
text: In this paper, we theoretically study the spectral and temporal properties
of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides.
Our theoretical approach is based on the formalism of Gaussian states and the
Langevin equation, which is elaborated for weak parametric down-conversion and
photon-number-unresolved click detection. Using the example of frequency-degenerate
type-II SPDC generated under the pump-idler group-velocity-matching condition,
we show how the joint-spectral intensity, mode structure, normalized second-order
correlation function, and Hong-Ou-Mandel interference pattern depend on internal
losses of the SPDC process. We found that the joint-spectral intensity is almost
insensitive to internal losses, while the second-order correlation function shows
a strong dependence on them, being different for the signal and idler beams in
the presence of internal losses. Based on the sensitivity of the normalized second-order
correlation function, we show how its measurement can be used to experimentally
determine internal losses.
article_number: '033122'
author:
- first_name: Denis A.
full_name: Kopylov, Denis A.
last_name: Kopylov
- first_name: Michael
full_name: Stefszky, Michael
id: '42777'
last_name: Stefszky
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
citation:
ama: 'Kopylov DA, Stefszky M, Meier T, Silberhorn C, Sharapova PR. Spectral and
temporal properties of type-II parametric down-conversion: The impact of losses
during state generation. Physical Review Research. 2025;7(3). doi:10.1103/zp72-7qwl'
apa: 'Kopylov, D. A., Stefszky, M., Meier, T., Silberhorn, C., & Sharapova,
P. R. (2025). Spectral and temporal properties of type-II parametric down-conversion:
The impact of losses during state generation. Physical Review Research,
7(3), Article 033122. https://doi.org/10.1103/zp72-7qwl'
bibtex: '@article{Kopylov_Stefszky_Meier_Silberhorn_Sharapova_2025, title={Spectral
and temporal properties of type-II parametric down-conversion: The impact of losses
during state generation}, volume={7}, DOI={10.1103/zp72-7qwl},
number={3033122}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Kopylov, Denis A. and Stefszky, Michael and Meier, Torsten
and Silberhorn, Christine and Sharapova, Polina R.}, year={2025} }'
chicago: 'Kopylov, Denis A., Michael Stefszky, Torsten Meier, Christine Silberhorn,
and Polina R. Sharapova. “Spectral and Temporal Properties of Type-II Parametric
down-Conversion: The Impact of Losses during State Generation.” Physical Review
Research 7, no. 3 (2025). https://doi.org/10.1103/zp72-7qwl.'
ieee: 'D. A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, and P. R. Sharapova,
“Spectral and temporal properties of type-II parametric down-conversion: The impact
of losses during state generation,” Physical Review Research, vol. 7, no.
3, Art. no. 033122, 2025, doi: 10.1103/zp72-7qwl.'
mla: 'Kopylov, Denis A., et al. “Spectral and Temporal Properties of Type-II Parametric
down-Conversion: The Impact of Losses during State Generation.” Physical Review
Research, vol. 7, no. 3, 033122, American Physical Society (APS), 2025, doi:10.1103/zp72-7qwl.'
short: D.A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, P.R. Sharapova, Physical
Review Research 7 (2025).
date_created: 2025-12-05T09:33:36Z
date_updated: 2025-12-05T09:55:22Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '288'
- _id: '230'
- _id: '623'
- _id: '429'
- _id: '35'
doi: 10.1103/zp72-7qwl
intvolume: ' 7'
issue: '3'
language:
- iso: eng
project:
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Spectral and temporal properties of type-II parametric down-conversion: The
impact of losses during state generation'
type: journal_article
user_id: '16199'
volume: 7
year: '2025'
...
---
_id: '60992'
abstract:
- lang: eng
text: Non-Hermitian systems hosting exceptional points (EPs) exhibit enhanced sensitivity
and unconventional mode dynamics. Going beyond isolated EPs, here we report on
the existence of exceptional rings (ERs) in planar optical resonators with specific
form of circular dichroism and TE-TM splitting. Such exceptional rings possess
intriguing topologies as discussed earlier for condensed matter systems, but they
remain virtually unexplored in presence of nonlinearity, for which our photonic
platform is ideal. We find that when Kerr-type nonlinearity (or saturable gain)
is introduced, the linear ER splits into two concentric ERs, with the larger-radius
ring being a ring of third-order EPs. Transitioning from linear to nonlinear regime,
we present a rigorous analysis of spectral topology and report enhanced and adjustable
perturbation response in the nonlinear regime. Whereas certain features are specific
to our system, the results on non-Hermitian spectral topology and nonlinearity-enhanced
perturbation response are generic and equally relevant to a broad class of other
nonlinear non-Hermitian systems, providing a universal framework for engineering
ERs and EPs in nonlinear non-Hermitian systems.
author:
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: 'Laura '
full_name: 'Ares Santos, Laura '
last_name: Ares Santos
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Wingenbach J, Ares Santos L, Ma X, Sperling J, Schumacher S. Sensitivity and
Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities.
Arxiv. Published online 2025. doi:10.48550/ARXIV.2507.07099
apa: Wingenbach, J., Ares Santos, L., Ma, X., Sperling, J., & Schumacher, S.
(2025). Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian
Planar Optical Microcavities. Arxiv. https://doi.org/10.48550/ARXIV.2507.07099
bibtex: '@article{Wingenbach_Ares Santos_Ma_Sperling_Schumacher_2025, title={Sensitivity
and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities},
DOI={10.48550/ARXIV.2507.07099},
journal={Arxiv}, publisher={Arxiv}, author={Wingenbach, Jan and Ares Santos, Laura and
Ma, Xuekai and Sperling, Jan and Schumacher, Stefan}, year={2025} }'
chicago: Wingenbach, Jan, Laura Ares Santos, Xuekai Ma, Jan Sperling, and Stefan
Schumacher. “Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian
Planar Optical Microcavities.” Arxiv, 2025. https://doi.org/10.48550/ARXIV.2507.07099.
ieee: 'J. Wingenbach, L. Ares Santos, X. Ma, J. Sperling, and S. Schumacher, “Sensitivity
and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities,”
Arxiv, 2025, doi: 10.48550/ARXIV.2507.07099.'
mla: Wingenbach, Jan, et al. “Sensitivity and Topology of Exceptional Rings in Nonlinear
Non-Hermitian Planar Optical Microcavities.” Arxiv, Arxiv, 2025, doi:10.48550/ARXIV.2507.07099.
short: J. Wingenbach, L. Ares Santos, X. Ma, J. Sperling, S. Schumacher, Arxiv (2025).
date_created: 2025-08-25T11:15:22Z
date_updated: 2025-12-05T13:55:48Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.48550/ARXIV.2507.07099
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '56'
name: TRR 142 - Project Area C
publication: Arxiv
publisher: Arxiv
status: public
title: Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar
Optical Microcavities
type: journal_article
user_id: '16199'
year: '2025'
...
---
_id: '62980'
abstract:
- lang: eng
text: We introduce a new classification of multimode states with a fixed
number of photons. This classification is based on the factorizability of homogeneous
multivariate polynomials and is invariant under unitary transformations. The classes
physically correspond to field excitations in terms of single and multiple photons,
each of which is in an arbitrary irreducible superposition of quantized modes.
We further show how the transitions between classes are rendered possible by photon
addition, photon subtraction, and photon-projection nonlinearities. We explicitly
put forward a design for a multilayer interferometer in which the states for different
classes can be generated with state-of-the-art experimental techniques. Limitations
of the proposed designs are analyzed using the introduced classification, providing
a benchmark for the robustness of certain states and classes.
article_number: '033062'
author:
- first_name: Denis A.
full_name: Kopylov, Denis A.
last_name: Kopylov
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Boris Edgar
full_name: Wembe Moafo, Boris Edgar
id: '95394'
last_name: Wembe Moafo
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: Kopylov DA, Offen C, Ares L, et al. Multiphoton, multimode state classification
for nonlinear optical circuits. Physical Review Research. 2025;7(3). doi:10.1103/sv6z-v1gk
apa: Kopylov, D. A., Offen, C., Ares, L., Wembe Moafo, B. E., Ober-Blöbaum, S.,
Meier, T., Sharapova, P. R., & Sperling, J. (2025). Multiphoton, multimode
state classification for nonlinear optical circuits. Physical Review Research,
7(3), Article 033062. https://doi.org/10.1103/sv6z-v1gk
bibtex: '@article{Kopylov_Offen_Ares_Wembe Moafo_Ober-Blöbaum_Meier_Sharapova_Sperling_2025,
title={Multiphoton, multimode state classification for nonlinear optical circuits},
volume={7}, DOI={10.1103/sv6z-v1gk},
number={3033062}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Kopylov, Denis A. and Offen, Christian and Ares, Laura
and Wembe Moafo, Boris Edgar and Ober-Blöbaum, Sina and Meier, Torsten and Sharapova,
Polina R. and Sperling, Jan}, year={2025} }'
chicago: Kopylov, Denis A., Christian Offen, Laura Ares, Boris Edgar Wembe Moafo,
Sina Ober-Blöbaum, Torsten Meier, Polina R. Sharapova, and Jan Sperling. “Multiphoton,
Multimode State Classification for Nonlinear Optical Circuits.” Physical Review
Research 7, no. 3 (2025). https://doi.org/10.1103/sv6z-v1gk.
ieee: 'D. A. Kopylov et al., “Multiphoton, multimode state classification
for nonlinear optical circuits,” Physical Review Research, vol. 7, no.
3, Art. no. 033062, 2025, doi: 10.1103/sv6z-v1gk.'
mla: Kopylov, Denis A., et al. “Multiphoton, Multimode State Classification for
Nonlinear Optical Circuits.” Physical Review Research, vol. 7, no. 3, 033062,
American Physical Society (APS), 2025, doi:10.1103/sv6z-v1gk.
short: D.A. Kopylov, C. Offen, L. Ares, B.E. Wembe Moafo, S. Ober-Blöbaum, T. Meier,
P.R. Sharapova, J. Sperling, Physical Review Research 7 (2025).
date_created: 2025-12-09T09:08:39Z
date_updated: 2025-12-09T09:10:01Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '706'
- _id: '636'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1103/sv6z-v1gk
intvolume: ' 7'
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Multiphoton, multimode state classification for nonlinear optical circuits
type: journal_article
user_id: '16199'
volume: 7
year: '2025'
...
---
_id: '62979'
abstract:
- lang: eng
text: We introduce a new classification of multimode states with a fixed number
of photons. This classification is based on the factorizability of homogeneous
multivariate polynomials and is invariant under unitary transformations. The classes
physically correspond to field excitations in terms of single and multiple photons,
each of which being in an arbitrary irreducible superposition of quantized modes.
We further show how the transitions between classes are rendered possible by photon
addition, photon subtraction, and photon-projection nonlinearities. We explicitly
put forward a design for a multilayer interferometer in which the states for different
classes can be generated with state-of-the-art experimental techniques. Limitations
of the proposed designs are analyzed using the introduced classification, providing
a benchmark for the robustness of certain states and classes.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
- first_name: Boris Edgar
full_name: Wembe Moafo, Boris Edgar
id: '95394'
last_name: Wembe Moafo
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
citation:
ama: Meier T, Sharapova PR, Sperling J, Ober-Blöbaum S, Wembe Moafo BE, Offen C.
Multiphoton, multimode state classification for nonlinear optical circuits. Published
online 2025.
apa: Meier, T., Sharapova, P. R., Sperling, J., Ober-Blöbaum, S., Wembe Moafo, B.
E., & Offen, C. (2025). Multiphoton, multimode state classification for
nonlinear optical circuits.
bibtex: '@article{Meier_Sharapova_Sperling_Ober-Blöbaum_Wembe Moafo_Offen_2025,
title={Multiphoton, multimode state classification for nonlinear optical circuits},
author={Meier, Torsten and Sharapova, Polina R. and Sperling, Jan and Ober-Blöbaum,
Sina and Wembe Moafo, Boris Edgar and Offen, Christian}, year={2025} }'
chicago: Meier, Torsten, Polina R. Sharapova, Jan Sperling, Sina Ober-Blöbaum, Boris
Edgar Wembe Moafo, and Christian Offen. “Multiphoton, Multimode State Classification
for Nonlinear Optical Circuits,” 2025.
ieee: T. Meier, P. R. Sharapova, J. Sperling, S. Ober-Blöbaum, B. E. Wembe Moafo,
and C. Offen, “Multiphoton, multimode state classification for nonlinear optical
circuits.” 2025.
mla: Meier, Torsten, et al. Multiphoton, Multimode State Classification for Nonlinear
Optical Circuits. 2025.
short: T. Meier, P.R. Sharapova, J. Sperling, S. Ober-Blöbaum, B.E. Wembe Moafo,
C. Offen, (2025).
date_created: 2025-12-09T08:59:27Z
date_updated: 2025-12-09T09:10:23Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '706'
- _id: '636'
- _id: '230'
- _id: '623'
- _id: '429'
- _id: '35'
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
status: public
title: Multiphoton, multimode state classification for nonlinear optical circuits
type: preprint
user_id: '16199'
year: '2025'
...
---
_id: '63562'
abstract:
- lang: eng
text: 'Entangled two-mode Gaussian states constitute an important building
block for continuous variable quantum computing and communication protocols. In
this work, we theoretically study two-mode bipartite states, which are extracted
from multimode light generated via type-II parametric downconversion (PDC) in
lossy waveguides. For these states, we demonstrate that the squeezing quantifies
entanglement and we construct a measurement basis, which results in the maximal
bipartite entanglement. We illustrate our findings by numerically solving the
spatial master equation for PDC in a Markovian environment. The optimal measurement
modes are compared with two widely used broadband bases: the Mercer–Wolf basis
(the first-order coherence basis) and the Williamson–Euler basis.'
article_number: '046116'
author:
- first_name: Denis
full_name: Kopylov, Denis
id: '98502'
last_name: Kopylov
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
citation:
ama: Kopylov D, Meier T, Sharapova PR. Bipartite entanglement extracted from multimode
squeezed light generated in lossy waveguides. APL Quantum. 2025;2(4). doi:10.1063/5.0293116
apa: Kopylov, D., Meier, T., & Sharapova, P. R. (2025). Bipartite entanglement
extracted from multimode squeezed light generated in lossy waveguides. APL
Quantum, 2(4), Article 046116. https://doi.org/10.1063/5.0293116
bibtex: '@article{Kopylov_Meier_Sharapova_2025, title={Bipartite entanglement extracted
from multimode squeezed light generated in lossy waveguides}, volume={2}, DOI={10.1063/5.0293116}, number={4046116},
journal={APL Quantum}, publisher={AIP Publishing}, author={Kopylov, Denis and
Meier, Torsten and Sharapova, Polina R.}, year={2025} }'
chicago: Kopylov, Denis, Torsten Meier, and Polina R. Sharapova. “Bipartite Entanglement
Extracted from Multimode Squeezed Light Generated in Lossy Waveguides.” APL
Quantum 2, no. 4 (2025). https://doi.org/10.1063/5.0293116.
ieee: 'D. Kopylov, T. Meier, and P. R. Sharapova, “Bipartite entanglement extracted
from multimode squeezed light generated in lossy waveguides,” APL Quantum,
vol. 2, no. 4, Art. no. 046116, 2025, doi: 10.1063/5.0293116.'
mla: Kopylov, Denis, et al. “Bipartite Entanglement Extracted from Multimode Squeezed
Light Generated in Lossy Waveguides.” APL Quantum, vol. 2, no. 4, 046116,
AIP Publishing, 2025, doi:10.1063/5.0293116.
short: D. Kopylov, T. Meier, P.R. Sharapova, APL Quantum 2 (2025).
date_created: 2026-01-12T13:18:51Z
date_updated: 2026-01-12T13:23:36Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '429'
- _id: '230'
- _id: '623'
- _id: '35'
doi: 10.1063/5.0293116
intvolume: ' 2'
issue: '4'
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: APL Quantum
publication_identifier:
issn:
- 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Bipartite entanglement extracted from multimode squeezed light generated in
lossy waveguides
type: journal_article
user_id: '16199'
volume: 2
year: '2025'
...
---
_id: '55140'
article_number: '012424'
author:
- first_name: Farha
full_name: Yasmin, Farha
last_name: Yasmin
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: 'Yasmin F, Sperling J. Entanglement-assisted quantum speedup: Beating local
quantum speed limits. Physical Review A. 2024;110(1). doi:10.1103/physreva.110.012424'
apa: 'Yasmin, F., & Sperling, J. (2024). Entanglement-assisted quantum speedup:
Beating local quantum speed limits. Physical Review A, 110(1), Article
012424. https://doi.org/10.1103/physreva.110.012424'
bibtex: '@article{Yasmin_Sperling_2024, title={Entanglement-assisted quantum speedup:
Beating local quantum speed limits}, volume={110}, DOI={10.1103/physreva.110.012424},
number={1012424}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Yasmin, Farha and Sperling, Jan}, year={2024} }'
chicago: 'Yasmin, Farha, and Jan Sperling. “Entanglement-Assisted Quantum Speedup:
Beating Local Quantum Speed Limits.” Physical Review A 110, no. 1 (2024).
https://doi.org/10.1103/physreva.110.012424.'
ieee: 'F. Yasmin and J. Sperling, “Entanglement-assisted quantum speedup: Beating
local quantum speed limits,” Physical Review A, vol. 110, no. 1, Art. no.
012424, 2024, doi: 10.1103/physreva.110.012424.'
mla: 'Yasmin, Farha, and Jan Sperling. “Entanglement-Assisted Quantum Speedup: Beating
Local Quantum Speed Limits.” Physical Review A, vol. 110, no. 1, 012424,
American Physical Society (APS), 2024, doi:10.1103/physreva.110.012424.'
short: F. Yasmin, J. Sperling, Physical Review A 110 (2024).
date_created: 2024-07-09T10:27:33Z
date_updated: 2024-07-09T10:29:29Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
doi: 10.1103/physreva.110.012424
intvolume: ' 110'
issue: '1'
language:
- iso: eng
project:
- _id: '174'
grant_number: '231447078'
name: 'TRR 142 - C10: TRR 142 - Erzeugung und Charakterisierung von Quantenlicht
in nichtlinearen Systemen: Eine theoretische Analyse (C10*)'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Entanglement-assisted quantum speedup: Beating local quantum speed limits'
type: journal_article
user_id: '75127'
volume: 110
year: '2024'
...
---
_id: '62916'
author:
- first_name: Hongdan
full_name: Zhang, Hongdan
last_name: Zhang
- first_name: Ruixin
full_name: Zuo, Ruixin
last_name: Zuo
- first_name: Shidong
full_name: Yang, Shidong
last_name: Yang
- first_name: Alexander
full_name: Trautmann, Alexander
last_name: Trautmann
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Weifeng
full_name: Yang, Weifeng
last_name: Yang
citation:
ama: 'Zhang H, Zuo R, Yang S, et al. Analyzing High-Order Harmonic Generation in
Solids Based on Semi-Classical Recollision Models. In: High-Order Harmonic
Generation in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0006'
apa: Zhang, H., Zuo, R., Yang, S., Trautmann, A., Song, X., Meier, T., & Yang,
W. (2024). Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical
Recollision Models. In High-Order Harmonic Generation in Solids. WORLD
SCIENTIFIC. https://doi.org/10.1142/9789811279560_0006
bibtex: '@inbook{Zhang_Zuo_Yang_Trautmann_Song_Meier_Yang_2024, title={Analyzing
High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models},
DOI={10.1142/9789811279560_0006},
booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC},
author={Zhang, Hongdan and Zuo, Ruixin and Yang, Shidong and Trautmann, Alexander
and Song, Xiaohong and Meier, Torsten and Yang, Weifeng}, year={2024} }'
chicago: Zhang, Hongdan, Ruixin Zuo, Shidong Yang, Alexander Trautmann, Xiaohong
Song, Torsten Meier, and Weifeng Yang. “Analyzing High-Order Harmonic Generation
in Solids Based on Semi-Classical Recollision Models.” In High-Order Harmonic
Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0006.
ieee: H. Zhang et al., “Analyzing High-Order Harmonic Generation in Solids
Based on Semi-Classical Recollision Models,” in High-Order Harmonic Generation
in Solids, WORLD SCIENTIFIC, 2024.
mla: Zhang, Hongdan, et al. “Analyzing High-Order Harmonic Generation in Solids
Based on Semi-Classical Recollision Models.” High-Order Harmonic Generation
in Solids, WORLD SCIENTIFIC, 2024, doi:10.1142/9789811279560_0006.
short: 'H. Zhang, R. Zuo, S. Yang, A. Trautmann, X. Song, T. Meier, W. Yang, in:
High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.'
date_created: 2025-12-05T09:42:23Z
date_updated: 2025-12-05T09:43:37Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
- _id: '429'
- _id: '27'
doi: 10.1142/9789811279560_0006
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: High-Order Harmonic Generation in Solids
publication_identifier:
isbn:
- '9789811279553'
- '9789811279560'
publication_status: published
publisher: WORLD SCIENTIFIC
status: public
title: Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical
Recollision Models
type: book_chapter
user_id: '16199'
year: '2024'
...
---
_id: '62917'
author:
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
- first_name: Ruixin
full_name: Zuo, Ruixin
last_name: Zuo
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Weifeng
full_name: Yang, Weifeng
last_name: Yang
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Reichelt M, Zuo R, Song X, Yang W, Meier T. High-Order Harmonic Generation
in Semiconductors with Excitonic Effects. In: High-Order Harmonic Generation
in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0009'
apa: Reichelt, M., Zuo, R., Song, X., Yang, W., & Meier, T. (2024). High-Order
Harmonic Generation in Semiconductors with Excitonic Effects. In High-Order
Harmonic Generation in Solids. WORLD SCIENTIFIC. https://doi.org/10.1142/9789811279560_0009
bibtex: '@inbook{Reichelt_Zuo_Song_Yang_Meier_2024, title={High-Order Harmonic Generation
in Semiconductors with Excitonic Effects}, DOI={10.1142/9789811279560_0009},
booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC},
author={Reichelt, Matthias and Zuo, Ruixin and Song, Xiaohong and Yang, Weifeng
and Meier, Torsten}, year={2024} }'
chicago: Reichelt, Matthias, Ruixin Zuo, Xiaohong Song, Weifeng Yang, and Torsten
Meier. “High-Order Harmonic Generation in Semiconductors with Excitonic Effects.”
In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0009.
ieee: M. Reichelt, R. Zuo, X. Song, W. Yang, and T. Meier, “High-Order Harmonic
Generation in Semiconductors with Excitonic Effects,” in High-Order Harmonic
Generation in Solids, WORLD SCIENTIFIC, 2024.
mla: Reichelt, Matthias, et al. “High-Order Harmonic Generation in Semiconductors
with Excitonic Effects.” High-Order Harmonic Generation in Solids, WORLD
SCIENTIFIC, 2024, doi:10.1142/9789811279560_0009.
short: 'M. Reichelt, R. Zuo, X. Song, W. Yang, T. Meier, in: High-Order Harmonic
Generation in Solids, WORLD SCIENTIFIC, 2024.'
date_created: 2025-12-05T09:44:20Z
date_updated: 2025-12-05T09:45:31Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1142/9789811279560_0009
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: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: High-Order Harmonic Generation in Solids
publication_identifier:
isbn:
- '9789811279553'
- '9789811279560'
publication_status: published
publisher: WORLD SCIENTIFIC
status: public
title: High-Order Harmonic Generation in Semiconductors with Excitonic Effects
type: book_chapter
user_id: '16199'
year: '2024'
...
---
_id: '44050'
article_number: '042420'
author:
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Elizabeth
full_name: Agudelo, Elizabeth
last_name: Agudelo
citation:
ama: 'Sperling J, Agudelo E. Entanglement of particles versus entanglement of fields:
Independent quantum resources. Physical Review A. 2023;107(4). doi:10.1103/physreva.107.042420'
apa: 'Sperling, J., & Agudelo, E. (2023). Entanglement of particles versus entanglement
of fields: Independent quantum resources. Physical Review A, 107(4),
Article 042420. https://doi.org/10.1103/physreva.107.042420'
bibtex: '@article{Sperling_Agudelo_2023, title={Entanglement of particles versus
entanglement of fields: Independent quantum resources}, volume={107}, DOI={10.1103/physreva.107.042420},
number={4042420}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Sperling, Jan and Agudelo, Elizabeth}, year={2023} }'
chicago: 'Sperling, Jan, and Elizabeth Agudelo. “Entanglement of Particles versus
Entanglement of Fields: Independent Quantum Resources.” Physical Review A
107, no. 4 (2023). https://doi.org/10.1103/physreva.107.042420.'
ieee: 'J. Sperling and E. Agudelo, “Entanglement of particles versus entanglement
of fields: Independent quantum resources,” Physical Review A, vol. 107,
no. 4, Art. no. 042420, 2023, doi: 10.1103/physreva.107.042420.'
mla: 'Sperling, Jan, and Elizabeth Agudelo. “Entanglement of Particles versus Entanglement
of Fields: Independent Quantum Resources.” Physical Review A, vol. 107,
no. 4, 042420, American Physical Society (APS), 2023, doi:10.1103/physreva.107.042420.'
short: J. Sperling, E. Agudelo, Physical Review A 107 (2023).
date_created: 2023-04-18T06:55:59Z
date_updated: 2023-04-20T15:03:33Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
- _id: '35'
doi: 10.1103/physreva.107.042420
intvolume: ' 107'
issue: '4'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '174'
name: 'TRR 142 - C10: TRR 142 - Subproject C10'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Entanglement of particles versus entanglement of fields: Independent quantum
resources'
type: journal_article
user_id: '16199'
volume: 107
year: '2023'
...
---
_id: '42973'
article_number: '113601'
article_type: letter_note
author:
- first_name: Carolin
full_name: Lüders, Carolin
last_name: Lüders
- first_name: Matthias
full_name: Pukrop, Matthias
id: '64535'
last_name: Pukrop
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Elena
full_name: Rozas, Elena
last_name: Rozas
- first_name: Christian
full_name: Schneider, Christian
last_name: Schneider
- first_name: Sven
full_name: Höfling, Sven
last_name: Höfling
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Marc
full_name: Aßmann, Marc
last_name: Aßmann
citation:
ama: Lüders C, Pukrop M, Barkhausen F, et al. Tracking Quantum Coherence in Polariton
Condensates with Time-Resolved Tomography. Physical Review Letters. 2023;130(11).
doi:10.1103/physrevlett.130.113601
apa: Lüders, C., Pukrop, M., Barkhausen, F., Rozas, E., Schneider, C., Höfling,
S., Sperling, J., Schumacher, S., & Aßmann, M. (2023). Tracking Quantum Coherence
in Polariton Condensates with Time-Resolved Tomography. Physical Review Letters,
130(11), Article 113601. https://doi.org/10.1103/physrevlett.130.113601
bibtex: '@article{Lüders_Pukrop_Barkhausen_Rozas_Schneider_Höfling_Sperling_Schumacher_Aßmann_2023,
title={Tracking Quantum Coherence in Polariton Condensates with Time-Resolved
Tomography}, volume={130}, DOI={10.1103/physrevlett.130.113601},
number={11113601}, journal={Physical Review Letters}, publisher={American Physical
Society (APS)}, author={Lüders, Carolin and Pukrop, Matthias and Barkhausen, Franziska
and Rozas, Elena and Schneider, Christian and Höfling, Sven and Sperling, Jan
and Schumacher, Stefan and Aßmann, Marc}, year={2023} }'
chicago: Lüders, Carolin, Matthias Pukrop, Franziska Barkhausen, Elena Rozas, Christian
Schneider, Sven Höfling, Jan Sperling, Stefan Schumacher, and Marc Aßmann. “Tracking
Quantum Coherence in Polariton Condensates with Time-Resolved Tomography.” Physical
Review Letters 130, no. 11 (2023). https://doi.org/10.1103/physrevlett.130.113601.
ieee: 'C. Lüders et al., “Tracking Quantum Coherence in Polariton Condensates
with Time-Resolved Tomography,” Physical Review Letters, vol. 130, no.
11, Art. no. 113601, 2023, doi: 10.1103/physrevlett.130.113601.'
mla: Lüders, Carolin, et al. “Tracking Quantum Coherence in Polariton Condensates
with Time-Resolved Tomography.” Physical Review Letters, vol. 130, no.
11, 113601, American Physical Society (APS), 2023, doi:10.1103/physrevlett.130.113601.
short: C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling,
J. Sperling, S. Schumacher, M. Aßmann, Physical Review Letters 130 (2023).
date_created: 2023-03-14T07:50:56Z
date_updated: 2023-04-20T15:28:42Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
- _id: '230'
- _id: '35'
- _id: '297'
doi: 10.1103/physrevlett.130.113601
intvolume: ' 130'
issue: '11'
keyword:
- General Physics and Astronomy
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '174'
name: 'TRR 142 - C10: TRR 142 - Subproject C10'
- _id: '173'
name: 'TRR 142 - C09: TRR 142 - Subproject C09'
publication: Physical Review Letters
publication_identifier:
issn:
- 0031-9007
- 1079-7114
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography
type: journal_article
user_id: '16199'
volume: 130
year: '2023'
...
---
_id: '55900'
article_number: '043158'
author:
- first_name: Dennis
full_name: Scharwald, Dennis
id: '55907'
last_name: Scharwald
orcid: 0009-0007-5654-5412
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Polina
full_name: Sharapova, Polina
last_name: Sharapova
citation:
ama: Scharwald D, Meier T, Sharapova P. Phase sensitivity of spatially broadband
high-gain SU(1,1) interferometers. Physical Review Research. 2023;5(4).
doi:10.1103/physrevresearch.5.043158
apa: Scharwald, D., Meier, T., & Sharapova, P. (2023). Phase sensitivity of
spatially broadband high-gain SU(1,1) interferometers. Physical Review Research,
5(4), Article 043158. https://doi.org/10.1103/physrevresearch.5.043158
bibtex: '@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially
broadband high-gain SU(1,1) interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158},
number={4043158}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Scharwald, Dennis and Meier, Torsten and Sharapova, Polina},
year={2023} }'
chicago: Scharwald, Dennis, Torsten Meier, and Polina Sharapova. “Phase Sensitivity
of Spatially Broadband High-Gain SU(1,1) Interferometers.” Physical Review
Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158.
ieee: 'D. Scharwald, T. Meier, and P. Sharapova, “Phase sensitivity of spatially
broadband high-gain SU(1,1) interferometers,” Physical Review Research,
vol. 5, no. 4, Art. no. 043158, 2023, doi: 10.1103/physrevresearch.5.043158.'
mla: Scharwald, Dennis, et al. “Phase Sensitivity of Spatially Broadband High-Gain
SU(1,1) Interferometers.” Physical Review Research, vol. 5, no. 4, 043158,
American Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043158.
short: D. Scharwald, T. Meier, P. Sharapova, Physical Review Research 5 (2023).
date_created: 2024-08-30T04:48:05Z
date_updated: 2026-02-01T13:21:22Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '623'
- _id: '27'
doi: 10.1103/physrevresearch.5.043158
intvolume: ' 5'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.5.043158
oa: '1'
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '174'
name: 'TRR 142 - C10: TRR 142 - Erzeugung und Charakterisierung von Quantenlicht
in nichtlinearen Systemen: Eine theoretische Analyse (C10*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers
type: journal_article
user_id: '55907'
volume: 5
year: '2023'
...
---
_id: '40386'
author:
- first_name: Polina
full_name: Sharapova, Polina
id: '60286'
last_name: Sharapova
- first_name: Kai Hong
full_name: Luo, Kai Hong
id: '36389'
last_name: Luo
orcid: 0000-0003-1008-4976
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Sharapova P, Luo KH, Herrmann H, Reichelt M, Silberhorn C, Meier T. Manipulation
of Two-Photon Interference by Entanglement. In: Conference on Lasers and Electro-Optics.
OSA; 2018. doi:10.1364/cleo_qels.2018.ff1b.8'
apa: 'Sharapova, P., Luo, K. H., Herrmann, H., Reichelt, M., Silberhorn, C., &
Meier, T. (2018). Manipulation of Two-Photon Interference by Entanglement. Conference
on Lasers and Electro-Optics. CLEO: QELS_Fundamental Science 2018, San Jose,
California United States. https://doi.org/10.1364/cleo_qels.2018.ff1b.8'
bibtex: '@inproceedings{Sharapova_Luo_Herrmann_Reichelt_Silberhorn_Meier_2018, title={Manipulation
of Two-Photon Interference by Entanglement}, DOI={10.1364/cleo_qels.2018.ff1b.8},
booktitle={Conference on Lasers and Electro-Optics}, publisher={OSA}, author={Sharapova,
Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Silberhorn,
Christine and Meier, Torsten}, year={2018} }'
chicago: Sharapova, Polina, Kai Hong Luo, Harald Herrmann, Matthias Reichelt, Christine
Silberhorn, and Torsten Meier. “Manipulation of Two-Photon Interference by Entanglement.”
In Conference on Lasers and Electro-Optics. OSA, 2018. https://doi.org/10.1364/cleo_qels.2018.ff1b.8.
ieee: 'P. Sharapova, K. H. Luo, H. Herrmann, M. Reichelt, C. Silberhorn, and T.
Meier, “Manipulation of Two-Photon Interference by Entanglement,” presented at
the CLEO: QELS_Fundamental Science 2018, San Jose, California United States, 2018,
doi: 10.1364/cleo_qels.2018.ff1b.8.'
mla: Sharapova, Polina, et al. “Manipulation of Two-Photon Interference by Entanglement.”
Conference on Lasers and Electro-Optics, OSA, 2018, doi:10.1364/cleo_qels.2018.ff1b.8.
short: 'P. Sharapova, K.H. Luo, H. Herrmann, M. Reichelt, C. Silberhorn, T. Meier,
in: Conference on Lasers and Electro-Optics, OSA, 2018.'
conference:
end_date: 2018-05-18
location: San Jose, California United States
name: 'CLEO: QELS_Fundamental Science 2018'
start_date: 2018-05-13
date_created: 2023-01-26T14:16:09Z
date_updated: 2025-12-16T11:36:11Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '288'
- _id: '35'
- _id: '429'
doi: 10.1364/cleo_qels.2018.ff1b.8
language:
- iso: eng
project:
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
publication: Conference on Lasers and Electro-Optics
publication_identifier:
isbn:
- 978-1-943580-42-2
publication_status: published
publisher: OSA
status: public
title: Manipulation of Two-Photon Interference by Entanglement
type: conference
user_id: '16199'
year: '2018'
...