---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '22100'
abstract:
- lang: eng
text: Spin mixtures of degenerate fermions are a cornerstone of quantum many-body
physics, enabling superfluidity, polarons, and rich spin dynamics through s-wave
scattering resonances. Combining them with strong, long-range dipolar interactions
provides highly flexible control schemes promising even more exotic quantum phases.
Recently, microwave shielding gave access to spin-polarized degenerate samples
of dipolar fermionic molecules, where tunable p-wave interactions were enabled
by field-linked resonances available only by compromising the shielding (due to
experimental limitations). Here, we study the scattering properties of a fermionic
dipolar spin mixture and show that a universal s-wave resonance is readily accessible
without compromising the shielding. We develop a universal description of the
tunable s-wave interaction and weakly bound tetratomic states based on the microwave-field
parameters. The s-wave resonance paves the way to stable, controllable and strongly-interacting
dipolar spin mixtures of deeply degenerate fermions and supports favorable conditions
to reach this regime via evaporative cooling.
acknowledgement: J.-L.Li thanks Gaoren Wang for valuable discussions on the absorbing
boundary condition. G.M.K. thanks P. Giannakeas for fruitful discussions during
the initial stages of this study. G.M.K. was funded by the Austrian Science Fund
(FWF) [10.55776/F1004]. R.A. received funding from the Austrian Academy of Science
ÖAW grant No. PR1029OEAW03. A.S. acknowledges funding from the European Union’s
Horizon Europe research and innovation programme under grant agreement No. 101219560.
article_number: '201'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Jinglun
full_name: Li, Jinglun
id: ff19510a-0d2c-11ef-b018-c338ad2f4325
last_name: Li
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: Mateja
full_name: Hrast, Mateja
id: 48dbb294-2a9c-11ef-905d-f56be71f0e5d
last_name: Hrast
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Andreas
full_name: Schindewolf, Andreas
last_name: Schindewolf
- first_name: Ragheed
full_name: Al Hyder, Ragheed
id: d1c405be-ae15-11ed-8510-ccf53278162e
last_name: Al Hyder
citation:
ama: Li J, Koutentakis G, Hrast M, Lemeshko M, Schindewolf A, Al Hyder R. Tunable
field-linked s-wave interactions in dipolar fermi mixtures. Communications
Physics. 2026;9. doi:10.1038/s42005-026-02578-8
apa: Li, J., Koutentakis, G., Hrast, M., Lemeshko, M., Schindewolf, A., & Al
Hyder, R. (2026). Tunable field-linked s-wave interactions in dipolar fermi mixtures.
Communications Physics. Springer Nature. https://doi.org/10.1038/s42005-026-02578-8
chicago: Li, Jinglun, Georgios Koutentakis, Mateja Hrast, Mikhail Lemeshko, Andreas
Schindewolf, and Ragheed Al Hyder. “Tunable Field-Linked s-Wave Interactions in
Dipolar Fermi Mixtures.” Communications Physics. Springer Nature, 2026.
https://doi.org/10.1038/s42005-026-02578-8.
ieee: J. Li, G. Koutentakis, M. Hrast, M. Lemeshko, A. Schindewolf, and R. Al Hyder,
“Tunable field-linked s-wave interactions in dipolar fermi mixtures,” Communications
Physics, vol. 9. Springer Nature, 2026.
ista: Li J, Koutentakis G, Hrast M, Lemeshko M, Schindewolf A, Al Hyder R. 2026.
Tunable field-linked s-wave interactions in dipolar fermi mixtures. Communications
Physics. 9, 201.
mla: Li, Jinglun, et al. “Tunable Field-Linked s-Wave Interactions in Dipolar Fermi
Mixtures.” Communications Physics, vol. 9, 201, Springer Nature, 2026,
doi:10.1038/s42005-026-02578-8.
short: J. Li, G. Koutentakis, M. Hrast, M. Lemeshko, A. Schindewolf, R. Al Hyder,
Communications Physics 9 (2026).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: The data that support the findings of this study are available
from the corresponding authors upon request. The computational codes that were used
to generate the figures presented in this study are available from the corresponding
authors upon request.
date_created: 2026-06-21T22:02:58Z
date_published: 2026-04-14T00:00:00Z
date_updated: 2026-06-24T06:10:44Z
day: '14'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1038/s42005-026-02578-8
external_id:
arxiv:
- '2506.23318'
file:
- access_level: open_access
checksum: 3bf5852b54b9f13ec1679056a5f58c3a
content_type: application/pdf
creator: dernst
date_created: 2026-06-24T06:09:35Z
date_updated: 2026-06-24T06:09:35Z
file_id: '22133'
file_name: 2026_CommunicationsPhysics_Li.pdf
file_size: 1161879
relation: main_file
success: 1
file_date_updated: 2026-06-24T06:09:35Z
has_accepted_license: '1'
intvolume: ' 9'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
- _id: 8fa7db46-16d5-11f0-9cad-917600954daf
grant_number: '12078'
name: Polarons in Lead Halide Perovskites
publication: Communications Physics
publication_identifier:
eissn:
- 2399-3650
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
researchdata_availability: upon request
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Tunable field-linked s-wave interactions in dipolar fermi mixtures
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '21149'
abstract:
- lang: eng
text: We present a general theoretical framework for helical dichroism (HD), establishing
an explicit link between chiral resolution and orbital angular momentum (OAM)
exchange in light–matter interaction. Tracing microscopic mechanisms of the OAM
transfer, we derive rotational selection rules, which establish that HD emerges
only from the spin–orbit coupling of light, even for beams without the far-field
OAM. Our findings refine the conditions for observing HD, provide a tool to re-examine
the outcome of prior experiments, and guide future designs for chiral sensing
with structured light.
acknowledgement: This research was funded in whole or in part by the Austrian Science
Fund (FWF) [10.55776/F1004].
article_number: '053204'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Mateja
full_name: Hrast, Mateja
id: 48dbb294-2a9c-11ef-905d-f56be71f0e5d
last_name: Hrast
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: Mikhail
full_name: Maslov, Mikhail
id: 2E65BB0E-F248-11E8-B48F-1D18A9856A87
last_name: Maslov
orcid: 0000-0003-4074-2570
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Hrast M, Koutentakis G, Maslov M, Lemeshko M. Bottom-up analysis of rovibrational
helical dichroism. Physical Review Letters. 2026;136(5). doi:10.1103/fkf1-1jml
apa: Hrast, M., Koutentakis, G., Maslov, M., & Lemeshko, M. (2026). Bottom-up
analysis of rovibrational helical dichroism. Physical Review Letters. American
Physical Society. https://doi.org/10.1103/fkf1-1jml
chicago: Hrast, Mateja, Georgios Koutentakis, Mikhail Maslov, and Mikhail Lemeshko.
“Bottom-up Analysis of Rovibrational Helical Dichroism.” Physical Review Letters.
American Physical Society, 2026. https://doi.org/10.1103/fkf1-1jml.
ieee: M. Hrast, G. Koutentakis, M. Maslov, and M. Lemeshko, “Bottom-up analysis
of rovibrational helical dichroism,” Physical Review Letters, vol. 136,
no. 5. American Physical Society, 2026.
ista: Hrast M, Koutentakis G, Maslov M, Lemeshko M. 2026. Bottom-up analysis of
rovibrational helical dichroism. Physical Review Letters. 136(5), 053204.
mla: Hrast, Mateja, et al. “Bottom-up Analysis of Rovibrational Helical Dichroism.”
Physical Review Letters, vol. 136, no. 5, 053204, American Physical Society,
2026, doi:10.1103/fkf1-1jml.
short: M. Hrast, G. Koutentakis, M. Maslov, M. Lemeshko, Physical Review Letters
136 (2026).
corr_author: '1'
date_created: 2026-02-06T10:53:17Z
date_published: 2026-02-05T00:00:00Z
date_updated: 2026-02-10T11:30:37Z
day: '05'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/fkf1-1jml
external_id:
arxiv:
- '2505.16393'
file:
- access_level: open_access
checksum: 805c929fff9fd4d0e733293eaace67b8
content_type: application/pdf
creator: dernst
date_created: 2026-02-10T11:25:46Z
date_updated: 2026-02-10T11:25:46Z
file_id: '21210'
file_name: 2026_PhysicalReviewLetters_Hrast.pdf
file_size: 511312
relation: main_file
success: 1
file_date_updated: 2026-02-10T11:25:46Z
has_accepted_license: '1'
intvolume: ' 136'
issue: '5'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Bottom-up analysis of rovibrational helical dichroism
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 136
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
_id: '21470'
abstract:
- lang: eng
text: Despite its pivotal role in optical manipulation, high capacity communications,
and quantum information, a general measure of orbital angular momentum (OAM) in
structured light remains elusive. In optical fields, where multiple vortices coexist,
the local nature of vortex OAM and the absence of a common rotation axis make
the total OAM of the field difficult to quantify. Here, we introduce the R index—a
metric that captures the intrinsic OAM content of any structured optical field,
from pure Laguerre–Gaussian modes to arbitrary multi vortex superpositions. Not
only does this metric quantify the total OAM, it also assesses field purity, providing
insight into the fidelity and robustness of the OAM generation. By unifying OAM
characterization into a single figure of merit, the R index enables direct comparison
across diverse beam profiles and facilitates the identification of optimal configurations
for both foundational studies and applied technologies.
acknowledgement: This research was funded in whole or in part by the Austrian Science
Fund (FWF) [10.55776/F1004]. For open access purposes, the author has applied a
CC BY public copyright license to any author accepted manuscript version arising
from this submission.
article_number: '015071'
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Monika
full_name: Bahl, Monika
last_name: Bahl
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: Mikhail
full_name: Maslov, Mikhail
id: 2E65BB0E-F248-11E8-B48F-1D18A9856A87
last_name: Maslov
orcid: 0000-0003-4074-2570
- first_name: Tom
full_name: Jungnickel, Tom
last_name: Jungnickel
- first_name: Timo
full_name: Gaßen, Timo
last_name: Gaßen
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Oliver H.
full_name: Heckl, Oliver H.
last_name: Heckl
citation:
ama: 'Bahl M, Koutentakis G, Maslov M, et al. The R-index: A universal metric for
evaluating OAM content and mode purity in optical fields. Journal of Physics:
Photonics. 2026;8(1). doi:10.1088/2515-7647/ae3506'
apa: 'Bahl, M., Koutentakis, G., Maslov, M., Jungnickel, T., Gaßen, T., Lemeshko,
M., & Heckl, O. H. (2026). The R-index: A universal metric for evaluating
OAM content and mode purity in optical fields. Journal of Physics: Photonics.
IOP Publishing. https://doi.org/10.1088/2515-7647/ae3506'
chicago: 'Bahl, Monika, Georgios Koutentakis, Mikhail Maslov, Tom Jungnickel, Timo
Gaßen, Mikhail Lemeshko, and Oliver H. Heckl. “The R-Index: A Universal Metric
for Evaluating OAM Content and Mode Purity in Optical Fields.” Journal of Physics:
Photonics. IOP Publishing, 2026. https://doi.org/10.1088/2515-7647/ae3506.'
ieee: 'M. Bahl et al., “The R-index: A universal metric for evaluating OAM
content and mode purity in optical fields,” Journal of Physics: Photonics,
vol. 8, no. 1. IOP Publishing, 2026.'
ista: 'Bahl M, Koutentakis G, Maslov M, Jungnickel T, Gaßen T, Lemeshko M, Heckl
OH. 2026. The R-index: A universal metric for evaluating OAM content and mode
purity in optical fields. Journal of Physics: Photonics. 8(1), 015071.'
mla: 'Bahl, Monika, et al. “The R-Index: A Universal Metric for Evaluating OAM Content
and Mode Purity in Optical Fields.” Journal of Physics: Photonics, vol.
8, no. 1, 015071, IOP Publishing, 2026, doi:10.1088/2515-7647/ae3506.'
short: 'M. Bahl, G. Koutentakis, M. Maslov, T. Jungnickel, T. Gaßen, M. Lemeshko,
O.H. Heckl, Journal of Physics: Photonics 8 (2026).'
corr_author: '1'
date_created: 2026-03-22T23:04:32Z
date_published: 2026-03-10T00:00:00Z
date_updated: 2026-03-23T13:26:26Z
day: '10'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1088/2515-7647/ae3506
external_id:
arxiv:
- '2508.12973'
file:
- access_level: open_access
checksum: 0ec8a2d3f9efa704203a41f068344974
content_type: application/pdf
creator: dernst
date_created: 2026-03-23T13:24:01Z
date_updated: 2026-03-23T13:24:01Z
file_id: '21476'
file_name: 2026_JPhysPhotonics_Bahl.pdf
file_size: 1150404
relation: main_file
success: 1
file_date_updated: 2026-03-23T13:24:01Z
has_accepted_license: '1'
intvolume: ' 8'
issue: '1'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication: 'Journal of Physics: Photonics'
publication_identifier:
eissn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'The R-index: A universal metric for evaluating OAM content and mode purity
in optical fields'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2026'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '21660'
abstract:
- lang: eng
text: Kapitza-Dirac scattering, the diffraction of matter waves from a standing
light field, is widely utilized in ultracold gases, but its behavior in the strongly
interacting regime is an open question. Here, we develop a numerically exact two-body
description of Kapitza-Dirac scattering for two contact-interacting atoms in a
one-dimensional harmonic trap subjected to a pulsed optical lattice, enabling
us to obtain the numerically exact dynamics. We map how interaction strength,
lattice depth, lattice wave number, and pulse duration reshape the diffraction
pattern, leading to an interaction-dependent population redistribution in real
and momentum space. By comparing the exact dynamics to an impulsive sudden-approximation
description, we delineate the parameter regimes where it remains accurate and
those, notably at strong attraction and small lattice wave number, where it fails.
Our results provide a controlled few-body benchmark for interacting Kapitza-Dirac
scattering and quantitative guidance for Kapitza-Dirac-based probes of ultracold
atomic systems.
acknowledgement: We thank Max Hachmann, Andreas Hemmerich, and Yann Kiefer for valuable
discussions. This work has been funded by the Cluster of Excellence “Advanced Imaging
of Matter” of the Deutsche Forschungsgemeinschaft (DFG) - EXC 2056 - Project ID
390715994. G.M.K. has received funding by the Austrian Science Fund (FWF) 10.55776/F1004.
article_number: '013297'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: A.
full_name: Becker, A.
last_name: Becker
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: P.
full_name: Schmelcher, P.
last_name: Schmelcher
citation:
ama: Becker A, Koutentakis G, Schmelcher P. Two-body Kapitza-Dirac scattering of
one-dimensional ultracold atoms. Physical Review Research. 2026;8. doi:10.1103/rdsn-stlq
apa: Becker, A., Koutentakis, G., & Schmelcher, P. (2026). Two-body Kapitza-Dirac
scattering of one-dimensional ultracold atoms. Physical Review Research.
American Physical Society. https://doi.org/10.1103/rdsn-stlq
chicago: Becker, A., Georgios Koutentakis, and P. Schmelcher. “Two-Body Kapitza-Dirac
Scattering of One-Dimensional Ultracold Atoms.” Physical Review Research.
American Physical Society, 2026. https://doi.org/10.1103/rdsn-stlq.
ieee: A. Becker, G. Koutentakis, and P. Schmelcher, “Two-body Kapitza-Dirac scattering
of one-dimensional ultracold atoms,” Physical Review Research, vol. 8.
American Physical Society, 2026.
ista: Becker A, Koutentakis G, Schmelcher P. 2026. Two-body Kapitza-Dirac scattering
of one-dimensional ultracold atoms. Physical Review Research. 8, 013297.
mla: Becker, A., et al. “Two-Body Kapitza-Dirac Scattering of One-Dimensional Ultracold
Atoms.” Physical Review Research, vol. 8, 013297, American Physical Society,
2026, doi:10.1103/rdsn-stlq.
short: A. Becker, G. Koutentakis, P. Schmelcher, Physical Review Research 8 (2026).
corr_author: '1'
date_created: 2026-04-05T22:01:32Z
date_published: 2026-03-18T00:00:00Z
date_updated: 2026-04-07T09:37:57Z
day: '18'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/rdsn-stlq
external_id:
arxiv:
- '2512.15260'
file:
- access_level: open_access
checksum: 339bff9d13486a8028049404988b9b0b
content_type: application/pdf
creator: dernst
date_created: 2026-04-07T09:34:31Z
date_updated: 2026-04-07T09:34:31Z
file_id: '21667'
file_name: 2026_PhysicalReviewResearch_Becker.pdf
file_size: 2131627
relation: main_file
success: 1
file_date_updated: 2026-04-07T09:34:31Z
has_accepted_license: '1'
intvolume: ' 8'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Two-body Kapitza-Dirac scattering of one-dimensional ultracold atoms
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2026'
...
---
OA_place: publisher
_id: '19048'
abstract:
- lang: eng
text: 'Rotations are found in physics problems at all scales: from spatial motion
of celestial bodies, to transitions between quantum states of atoms and molecules.
Mathematically, they represent a fundamental class of transformations and symmetries.
Unlike spatial displacements, rotational transformations in three-dimensional
space are non-commutative: the result of applying a sequence of rotations depends
on the order of these operations. This feature makes the emergent physics that
involves rotations rather intricate, but instrumental for studies of highly-interconnected
many-body systems. In the presence of an environment, rotational properties of
an object change, due to the interaction with particles of the environment. Owing
to the complexity of this interaction, it can be engineered to exhibit certain
properties of interest. In this Thesis, we examine several scenarios of how the
rotational behavior of an impurity can be modified by interactions with its environment.'
acknowledged_ssus:
- _id: CampIT
- _id: E-Lib
- _id: SSU
acknowledgement: "I am grateful to the European Research Council (ERC) [10.3030/801770]
and Austrian\r\nScience Fund (FWF) [10.55776/F1004] for funding my research and
to the Physical\r\nReview journals for publishing it. I also want to thank the VCQ
(previously CoQuS) and\r\nIQOQI for organizing wonderful networking events for the
physics community in Vienna\r\nand Innsbruck, respectively. Moreover, I thank Austrian
Science Fund (FWF) for the\r\ncontinuous support for quantum research."
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Mikhail
full_name: Maslov, Mikhail
id: 2E65BB0E-F248-11E8-B48F-1D18A9856A87
last_name: Maslov
orcid: 0000-0003-4074-2570
citation:
ama: Maslov M. Emergent physics of rotating quantum impurities in many-body environments.
2025. doi:10.15479/at:ista:19048
apa: Maslov, M. (2025). Emergent physics of rotating quantum impurities in many-body
environments. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:19048
chicago: Maslov, Mikhail. “Emergent Physics of Rotating Quantum Impurities in Many-Body
Environments.” Institute of Science and Technology Austria, 2025. https://doi.org/10.15479/at:ista:19048.
ieee: M. Maslov, “Emergent physics of rotating quantum impurities in many-body environments,”
Institute of Science and Technology Austria, 2025.
ista: Maslov M. 2025. Emergent physics of rotating quantum impurities in many-body
environments. Institute of Science and Technology Austria.
mla: Maslov, Mikhail. Emergent Physics of Rotating Quantum Impurities in Many-Body
Environments. Institute of Science and Technology Austria, 2025, doi:10.15479/at:ista:19048.
short: M. Maslov, Emergent Physics of Rotating Quantum Impurities in Many-Body Environments,
Institute of Science and Technology Austria, 2025.
corr_author: '1'
date_created: 2025-02-18T01:41:27Z
date_published: 2025-02-18T00:00:00Z
date_updated: 2026-04-16T12:20:38Z
day: '18'
ddc:
- '539'
- '535'
- '541'
degree_awarded: PhD
department:
- _id: GradSch
- _id: MiLe
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call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
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grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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status: public
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relation: part_of_dissertation
status: public
- id: '18087'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
title: Emergent physics of rotating quantum impurities in many-body environments
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short: CC BY-NC-SA (4.0)
type: dissertation
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year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: diamond
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_id: '20666'
abstract:
- lang: eng
text: We theoretically investigate the stationary properties of a spin-1/2 impurity
immersed in a one-dimensional confined Bose gas. In particular, we consider coherently
coupled spin states with an external field, where only one spin component interacts
with the bath, enabling light dressing of the impurity and spin-dependent bath-impurity
interactions. Through detailed comparisons with ab-initio many-body simulations,
we demonstrate that the composite system is accurately described by a simplified
effective Hamiltonian. The latter builds upon previously developed effective potential
approaches in the absence of light dressing. It can be used to extract the impurity
energy, residue, effective mass, and anharmonicity induced by the phononic dressing.
Light-dressing is shown to increase the polaron residue, undressing the impurity
from phononic excitations because of strong spin coupling. For strong repulsions,
previously shown to trigger dynamical Bose polaron decay (a phenomenon called
temporal orthogonality catastrophe), it is explained that strong light-dressing
stabilizes a repulsive polaron-dressed state. Our results establish the effective
Hamiltonian framework as a powerful tool for exploring strongly interacting polaronic
systems and corroborating forthcoming experimental realizations.
acknowledgement: "G.M.K. has received funding by the Austrian Science Fund (FWF)\r\n[DOI:
10.55776/F1004]. S.I.M acknowledges support from the Missouri University of Science
and Technology, Department of Physics, Startup fund. F.G. acknowledges funding by
the\r\nDeutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s
Excellence Strategy – EXC-2111 — 390814868. H.R.S. acknowledges support for ITAMP
by the\r\nNSF. P.S. acknowledges funding by the Cluster of Excellence “Advanced
Imaging of Matter” of\r\nthe Deutsche Forschungsgemeinschaft (DFG) - EXC 2056 -
project ID 390715994."
article_number: '093'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: S. I.
full_name: Mistakidis, S. I.
last_name: Mistakidis
- first_name: F.
full_name: Grusdt, F.
last_name: Grusdt
- first_name: H. R.
full_name: Sadeghpour, H. R.
last_name: Sadeghpour
- first_name: P.
full_name: Schmelcher, P.
last_name: Schmelcher
citation:
ama: Koutentakis G, Mistakidis SI, Grusdt F, Sadeghpour HR, Schmelcher P. Competition
of light-and phonon-dressing in microwave-dressed Bose polarons. Scipost Physics.
2025;19(4). doi:10.21468/SciPostPhys.19.4.093
apa: Koutentakis, G., Mistakidis, S. I., Grusdt, F., Sadeghpour, H. R., & Schmelcher,
P. (2025). Competition of light-and phonon-dressing in microwave-dressed Bose
polarons. Scipost Physics. SciPost Foundation. https://doi.org/10.21468/SciPostPhys.19.4.093
chicago: Koutentakis, Georgios, S. I. Mistakidis, F. Grusdt, H. R. Sadeghpour, and
P. Schmelcher. “Competition of Light-and Phonon-Dressing in Microwave-Dressed
Bose Polarons.” Scipost Physics. SciPost Foundation, 2025. https://doi.org/10.21468/SciPostPhys.19.4.093.
ieee: G. Koutentakis, S. I. Mistakidis, F. Grusdt, H. R. Sadeghpour, and P. Schmelcher,
“Competition of light-and phonon-dressing in microwave-dressed Bose polarons,”
Scipost Physics, vol. 19, no. 4. SciPost Foundation, 2025.
ista: Koutentakis G, Mistakidis SI, Grusdt F, Sadeghpour HR, Schmelcher P. 2025.
Competition of light-and phonon-dressing in microwave-dressed Bose polarons. Scipost
Physics. 19(4), 093.
mla: Koutentakis, Georgios, et al. “Competition of Light-and Phonon-Dressing in
Microwave-Dressed Bose Polarons.” Scipost Physics, vol. 19, no. 4, 093,
SciPost Foundation, 2025, doi:10.21468/SciPostPhys.19.4.093.
short: G. Koutentakis, S.I. Mistakidis, F. Grusdt, H.R. Sadeghpour, P. Schmelcher,
Scipost Physics 19 (2025).
corr_author: '1'
date_created: 2025-11-23T23:01:39Z
date_published: 2025-10-01T00:00:00Z
date_updated: 2025-12-01T15:22:01Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.21468/SciPostPhys.19.4.093
external_id:
arxiv:
- '2504.03411'
isi:
- '001593017800002'
file:
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checksum: 04d0e47ba66c63737431d7b8ed1df4bc
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creator: dernst
date_created: 2025-11-24T08:42:42Z
date_updated: 2025-11-24T08:42:42Z
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file_name: 2025_SciPostPhys_Koutentakis.pdf
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month: '10'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication: Scipost Physics
publication_identifier:
eissn:
- 2542-4653
publication_status: published
publisher: SciPost Foundation
quality_controlled: '1'
scopus_import: '1'
status: public
title: Competition of light-and phonon-dressing in microwave-dressed Bose polarons
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 19
year: '2025'
...
---
DOAJ_listed: '1'
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PlanS_conform: '1'
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abstract:
- lang: eng
text: 'We investigate the real-time dynamics of a quenched quantum impurity immersed
in a one-dimensional ultracold Fermi gas, focusing on the breakdown of the adiabatic
Born-Oppenheimer approximation due to nonadiabatic effects. Despite a sizable
impurity-bath mass imbalance, increasing interactions induce strong nonadiabatic
couplings, disrupting adiabatic motion and enabling population transfer between
the adiabatic potential energy curves. These transitions are governed by conical
intersections arising from the pseudo Jahn-Teller effect, dynamically shaping
the impurity''s motion through the bath. Using ab initio simulations via the multilayer
multiconfiguration time-dependent Hartree method and a multichannel Born-Oppenheimer
framework, we track the impurity''s evolution and directly prove the dynamical
manifestation of the pseudo Jahn-Teller effect. We analyze two key scenarios:
(i) a small initial shift, where a single avoided crossing drives transitions,
and (ii) a large shift, where multiple avoided crossings lead to enhanced nonadiabaticity,
self-trapping, and energy redistribution. Our findings establish ultracold fermionic
few-body systems as tunable platforms for studying nonadiabatic quantum dynamics,
opening new avenues for controlled impurity transport in strongly correlated environments.'
acknowledgement: 'This work has been funded by the Cluster of Excellence “Advanced
Imaging of Matter” of the Deutsche Forschungsgemeinschaft (DFG) - EXC 2056 - Project
ID 390715994. G.K.M. has received funding from the Austrian Science Fund (FWF) [DOI:
10.55776/F1004].'
article_number: '033088'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: A.
full_name: Becker, A.
last_name: Becker
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: P.
full_name: Schmelcher, P.
last_name: Schmelcher
citation:
ama: Becker A, Koutentakis G, Schmelcher P. Dynamical probe of the pseudo Jahn-Teller
effect in one-dimensional confined fermions. Physical Review Research.
2025;7(3). doi:10.1103/2fr6-b59y
apa: Becker, A., Koutentakis, G., & Schmelcher, P. (2025). Dynamical probe of
the pseudo Jahn-Teller effect in one-dimensional confined fermions. Physical
Review Research. American Physical Society. https://doi.org/10.1103/2fr6-b59y
chicago: Becker, A., Georgios Koutentakis, and P. Schmelcher. “Dynamical Probe of
the Pseudo Jahn-Teller Effect in One-Dimensional Confined Fermions.” Physical
Review Research. American Physical Society, 2025. https://doi.org/10.1103/2fr6-b59y.
ieee: A. Becker, G. Koutentakis, and P. Schmelcher, “Dynamical probe of the pseudo
Jahn-Teller effect in one-dimensional confined fermions,” Physical Review Research,
vol. 7, no. 3. American Physical Society, 2025.
ista: Becker A, Koutentakis G, Schmelcher P. 2025. Dynamical probe of the pseudo
Jahn-Teller effect in one-dimensional confined fermions. Physical Review Research.
7(3), 033088.
mla: Becker, A., et al. “Dynamical Probe of the Pseudo Jahn-Teller Effect in One-Dimensional
Confined Fermions.” Physical Review Research, vol. 7, no. 3, 033088, American
Physical Society, 2025, doi:10.1103/2fr6-b59y.
short: A. Becker, G. Koutentakis, P. Schmelcher, Physical Review Research 7 (2025).
corr_author: '1'
date_created: 2025-12-07T23:02:02Z
date_published: 2025-07-01T00:00:00Z
date_updated: 2025-12-09T14:16:15Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/2fr6-b59y
external_id:
arxiv:
- '2503.09835'
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date_created: 2025-12-09T14:14:46Z
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month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 7c040762-9f16-11ee-852c-dd79eeee4ab3
grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dynamical probe of the pseudo Jahn-Teller effect in one-dimensional confined
fermions
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legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
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type: journal_article
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...
---
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OA_place: publisher
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abstract:
- lang: eng
text: We present a theory describing the interaction of structured light, such as
light carrying orbital angular momentum, with molecules. The light-matter interaction
Hamiltonian we derive is expressed through couplings between spherical gradients
of the electric field and the (transition) electric multipole moments of a particle
of any nontrivial rotation point group. Our model can therefore accommodate an
arbitrary complexity of the molecular and electric field structure, and it can
be straightforwardly extended to atoms or nanostructures. Applying this framework
to rovibrational spectroscopy of molecules, we uncover the general mechanism of
angular momentum exchange between the spin and orbital angular momenta of light,
molecular rotation, and its center-of-mass motion. We show that the nonzero vorticity
of Laguerre-Gaussian beams can strongly enhance certain rovibrational transitions
that are considered forbidden in the case of nonhelical light. We discuss the
experimental requirements for the observation of these forbidden transitions in
state-of-the-art spatially resolved spectroscopy measurements.
acknowledgement: We are grateful to Emilio Pisanty and Philipp Lunt for valuable discussions.
This research was funded wholly or in part by the Austrian Science Fund (FWF) [10.55776/F1004].
G.M.K. gratefully acknowledges funding from the European Union’s Horizon 2020 research
and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 101034413.
M.L. acknowledges support by the European Research Council (ERC) Starting Grant
No. 801770 (ANGULON). O.H.H. acknowledges support by the Austrian Science Fund (FWF)
[10.55776/P36040]. Furthermore, the financial support by the Austrian Federal Ministry
for Digital and Economic Affairs, the National Foundation for Research, Technology
and Development, and the Christian Doppler Research Association is gratefully acknowledged.
article_number: '033277'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Mikhail
full_name: Maslov, Mikhail
id: 2E65BB0E-F248-11E8-B48F-1D18A9856A87
last_name: Maslov
orcid: 0000-0003-4074-2570
- first_name: Georgios
full_name: Koutentakis, Georgios
id: d7b23d3a-9e21-11ec-b482-f76739596b95
last_name: Koutentakis
- first_name: Mateja
full_name: Hrast, Mateja
id: 48dbb294-2a9c-11ef-905d-f56be71f0e5d
last_name: Hrast
- first_name: Oliver H.
full_name: Heckl, Oliver H.
last_name: Heckl
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Maslov M, Koutentakis G, Hrast M, Heckl OH, Lemeshko M. Theory of angular momentum
transfer from light to molecules. Physical Review Research. 2024;6(3).
doi:10.1103/physrevresearch.6.033277
apa: Maslov, M., Koutentakis, G., Hrast, M., Heckl, O. H., & Lemeshko, M. (2024).
Theory of angular momentum transfer from light to molecules. Physical Review
Research. American Physical Society. https://doi.org/10.1103/physrevresearch.6.033277
chicago: Maslov, Mikhail, Georgios Koutentakis, Mateja Hrast, Oliver H. Heckl, and
Mikhail Lemeshko. “Theory of Angular Momentum Transfer from Light to Molecules.”
Physical Review Research. American Physical Society, 2024. https://doi.org/10.1103/physrevresearch.6.033277.
ieee: M. Maslov, G. Koutentakis, M. Hrast, O. H. Heckl, and M. Lemeshko, “Theory
of angular momentum transfer from light to molecules,” Physical Review Research,
vol. 6, no. 3. American Physical Society, 2024.
ista: Maslov M, Koutentakis G, Hrast M, Heckl OH, Lemeshko M. 2024. Theory of angular
momentum transfer from light to molecules. Physical Review Research. 6(3), 033277.
mla: Maslov, Mikhail, et al. “Theory of Angular Momentum Transfer from Light to
Molecules.” Physical Review Research, vol. 6, no. 3, 033277, American Physical
Society, 2024, doi:10.1103/physrevresearch.6.033277.
short: M. Maslov, G. Koutentakis, M. Hrast, O.H. Heckl, M. Lemeshko, Physical Review
Research 6 (2024).
corr_author: '1'
date_created: 2024-09-18T11:43:16Z
date_published: 2024-09-10T00:00:00Z
date_updated: 2026-04-07T11:52:53Z
day: '10'
ddc:
- '530'
department:
- _id: GradSch
- _id: MiLe
doi: 10.1103/physrevresearch.6.033277
ec_funded: 1
external_id:
arxiv:
- '2310.00095'
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checksum: 8f744d94956a1683b473b1cf9b411a37
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oa: 1
oa_version: Published Version
project:
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grant_number: F100403
name: Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
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call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
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call_identifier: FWF
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publisher: American Physical Society
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title: Theory of angular momentum transfer from light to molecules
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type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2024'
...