---
_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: '62862'
abstract:
- lang: eng
text: Exciton polariton condensates are macroscopic coherent states in which
topological excitations can be observed. In this work, we observe the excitation
of the vortices and realize tuning the topological charge by manipulating the
pumping configurations. Using a digital micromirror device, we constructed an
annular pumping pattern where the inner and outer rings can be easily tuned. Both
the number and the topological charge of the vortices can be changed by slightly
tuning the inner ring position against the outer ring. The experimental results
can be reproduced in theory by the Gross–Pitaevskii equation. Our work offers
to generate and manipulate vortices in exciton polariton condensates using a straightforward
optical method.
article_number: '121103'
author:
- first_name: Qiang
full_name: Ai, Qiang
last_name: Ai
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Xiaokun
full_name: Zhai, Xiaokun
last_name: Zhai
- first_name: Chunzi
full_name: Xing, Chunzi
last_name: Xing
- first_name: Xinmiao
full_name: Yang, Xinmiao
last_name: Yang
- first_name: Peilin
full_name: Wang, Peilin
last_name: Wang
- first_name: Tianyu
full_name: Liu, Tianyu
last_name: Liu
- first_name: Yong
full_name: Zhang, Yong
last_name: Zhang
- first_name: Yazhou
full_name: Gu, Yazhou
last_name: Gu
- first_name: Peigang
full_name: Li, Peigang
last_name: Li
- first_name: Zhitong
full_name: Li, Zhitong
last_name: Li
- first_name: Zacharias
full_name: Hatzopoulos, Zacharias
last_name: Hatzopoulos
- first_name: Pavlos G.
full_name: Savvidis, Pavlos G.
last_name: Savvidis
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Tingge
full_name: Gao, Tingge
last_name: Gao
citation:
ama: Ai Q, Ma X, Barkhausen F, et al. Tuning polariton vortices in an asymmetric
ring potential. Applied Physics Letters. 2025;127(12). doi:10.1063/5.0287076
apa: Ai, Q., Ma, X., Barkhausen, F., Zhai, X., Xing, C., Yang, X., Wang, P., Liu,
T., Zhang, Y., Gu, Y., Li, P., Li, Z., Hatzopoulos, Z., Savvidis, P. G., Schumacher,
S., & Gao, T. (2025). Tuning polariton vortices in an asymmetric ring potential.
Applied Physics Letters, 127(12), Article 121103. https://doi.org/10.1063/5.0287076
bibtex: '@article{Ai_Ma_Barkhausen_Zhai_Xing_Yang_Wang_Liu_Zhang_Gu_et al._2025,
title={Tuning polariton vortices in an asymmetric ring potential}, volume={127},
DOI={10.1063/5.0287076}, number={12121103},
journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Ai, Qiang
and Ma, Xuekai and Barkhausen, Franziska and Zhai, Xiaokun and Xing, Chunzi and
Yang, Xinmiao and Wang, Peilin and Liu, Tianyu and Zhang, Yong and Gu, Yazhou
and et al.}, year={2025} }'
chicago: Ai, Qiang, Xuekai Ma, Franziska Barkhausen, Xiaokun Zhai, Chunzi Xing,
Xinmiao Yang, Peilin Wang, et al. “Tuning Polariton Vortices in an Asymmetric
Ring Potential.” Applied Physics Letters 127, no. 12 (2025). https://doi.org/10.1063/5.0287076.
ieee: 'Q. Ai et al., “Tuning polariton vortices in an asymmetric ring potential,”
Applied Physics Letters, vol. 127, no. 12, Art. no. 121103, 2025, doi:
10.1063/5.0287076.'
mla: Ai, Qiang, et al. “Tuning Polariton Vortices in an Asymmetric Ring Potential.”
Applied Physics Letters, vol. 127, no. 12, 121103, AIP Publishing, 2025,
doi:10.1063/5.0287076.
short: Q. Ai, X. Ma, F. Barkhausen, X. Zhai, C. Xing, X. Yang, P. Wang, T. Liu,
Y. Zhang, Y. Gu, P. Li, Z. Li, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, T.
Gao, Applied Physics Letters 127 (2025).
date_created: 2025-12-04T12:25:12Z
date_updated: 2025-12-04T12:27:02Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1063/5.0287076
intvolume: ' 127'
issue: '12'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Applied Physics Letters
publication_identifier:
issn:
- 0003-6951
- 1077-3118
publication_status: published
publisher: AIP Publishing
status: public
title: Tuning polariton vortices in an asymmetric ring potential
type: journal_article
user_id: '16199'
volume: 127
year: '2025'
...
---
_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: '61266'
abstract:
- lang: eng
text: This review examines the use of continuous-variable spectroscopy techniques
for investigating quantum coherence and light-matter interactions in semiconductor
systems with ultrafast dynamics. Special emphasis is placed on multichannel homodyne
detection as a powerful tool to measure the quantum coherence and the full density
matrix of a polariton system. Observations, such as coherence times that exceed
the nanosecond scale obtained by monitoring the temporal decay of quantum coherence
in a polariton condensate, are discussed. Proof-of-concept experiments and numerical
simulations that demonstrate the enhanced resourcefulness of the produced system
states for modern quantum protocols are assessed. The combination of tailored
resource quantifiers and ultrafast spectroscopy techniques that have recently
been demonstrated paves the way for future applications of quantum information
technologies.
article_number: '2997'
author:
- first_name: Carolin
full_name: Lüders, Carolin
last_name: Lüders
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Matthias
full_name: Pukrop, Matthias
last_name: Pukrop
- first_name: Elena
full_name: Rozas, Elena
last_name: Rozas
- 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, Barkhausen F, Pukrop M, et al. Continuous-variable quantum optics
and resource theory for ultrafast semiconductor spectroscopy [Invited]. Optical
Materials Express. 2023;13(11). doi:10.1364/ome.497006
apa: Lüders, C., Barkhausen, F., Pukrop, M., Rozas, E., Sperling, J., Schumacher,
S., & Aßmann, M. (2023). Continuous-variable quantum optics and resource theory
for ultrafast semiconductor spectroscopy [Invited]. Optical Materials Express,
13(11), Article 2997. https://doi.org/10.1364/ome.497006
bibtex: '@article{Lüders_Barkhausen_Pukrop_Rozas_Sperling_Schumacher_Aßmann_2023,
title={Continuous-variable quantum optics and resource theory for ultrafast semiconductor
spectroscopy [Invited]}, volume={13}, DOI={10.1364/ome.497006},
number={112997}, journal={Optical Materials Express}, publisher={Optica Publishing
Group}, author={Lüders, Carolin and Barkhausen, Franziska and Pukrop, Matthias
and Rozas, Elena and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2023}
}'
chicago: Lüders, Carolin, Franziska Barkhausen, Matthias Pukrop, Elena Rozas, Jan
Sperling, Stefan Schumacher, and Marc Aßmann. “Continuous-Variable Quantum Optics
and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” Optical
Materials Express 13, no. 11 (2023). https://doi.org/10.1364/ome.497006.
ieee: 'C. Lüders et al., “Continuous-variable quantum optics and resource
theory for ultrafast semiconductor spectroscopy [Invited],” Optical Materials
Express, vol. 13, no. 11, Art. no. 2997, 2023, doi: 10.1364/ome.497006.'
mla: Lüders, Carolin, et al. “Continuous-Variable Quantum Optics and Resource Theory
for Ultrafast Semiconductor Spectroscopy [Invited].” Optical Materials Express,
vol. 13, no. 11, 2997, Optica Publishing Group, 2023, doi:10.1364/ome.497006.
short: C. Lüders, F. Barkhausen, M. Pukrop, E. Rozas, J. Sperling, S. Schumacher,
M. Aßmann, Optical Materials Express 13 (2023).
date_created: 2025-09-12T11:40:26Z
date_updated: 2025-09-12T11:41:42Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '623'
doi: 10.1364/ome.497006
intvolume: ' 13'
issue: '11'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: Optical Materials Express
publication_identifier:
issn:
- 2159-3930
publication_status: published
publisher: Optica Publishing Group
status: public
title: Continuous-variable quantum optics and resource theory for ultrafast semiconductor
spectroscopy [Invited]
type: journal_article
user_id: '16199'
volume: 13
year: '2023'
...