---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '21009'
abstract:
- lang: eng
text: We demonstrate that periodically driven quantum rotors provide a promising
and broadly applicable platform to implement multigap topological phases, where
groups of bands can acquire topological invariants due to non-Abelian braiding
of band degeneracies. By adiabatically varying the periodic kicks to the rotor
we find nodal-line braiding, which causes sign flips of topological charges of
band nodes and can prevent them from annihilating, indicated by nonzero values
of the patch Euler class. In particular, we report on the emergence of an anomalous
Dirac string phase arising in the strongly driven regime, a truly out-of-equilibrium
phase of the quantum rotor. This phase emanates from braiding processes involving
all (quasienergy) gaps and manifests itself with edge states at zero angular momentum.
Our results reveal direct applications in state-of-the-art experiments of quantum
rotors, such as linear molecules driven by periodic far-off-resonant laser pulses
or artificial quantum rotors in optical lattices, whose extensive versatility
offers precise modification and observation of novel non-Abelian topological properties.
acknowledgement: We thank G. M. Koutentakis, S. Wimberger, J. G. E. Harris, T. Enss,
and A. Ghazaryan for fruitful discussions. M.L. acknowledges support by the European
Research Council (ERC) Starting Grant No. 801770 (ANGULON). R.-J.S. acknowledges
funding from a EPSRC ERC underwrite (Grant No. EP/X025829/1), a EPSRC New Investigator
Award (Grant No. EP/W00187X/1), and Trinity College, Cambridge. F.N.Ü. acknowledges
support from the Marie Skłodowska-Curie Programme of the European Commission (Grant
No. 893915), a Simons Investigator Award (Grant No. 511029), Trinity College Cambridge,
and the Royal Society (Grant No. URF/R1/241667).
article_number: '012216'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Volker
full_name: Karle, Volker
id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425
last_name: Karle
orcid: 0000-0002-6963-0129
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Adrien
full_name: Bouhon, Adrien
last_name: Bouhon
- first_name: Robert-Jan
full_name: Slager, Robert-Jan
last_name: Slager
- first_name: F. Nur
full_name: Ünal, F. Nur
last_name: Ünal
citation:
ama: Karle V, Lemeshko M, Bouhon A, Slager R-J, Ünal FN. Anomalous multigap topological
phases in periodically driven quantum rotors. Physical Review A. 2026;113(1).
doi:10.1103/db9d-9bns
apa: Karle, V., Lemeshko, M., Bouhon, A., Slager, R.-J., & Ünal, F. N. (2026).
Anomalous multigap topological phases in periodically driven quantum rotors. Physical
Review A. American Physical Society. https://doi.org/10.1103/db9d-9bns
chicago: Karle, Volker, Mikhail Lemeshko, Adrien Bouhon, Robert-Jan Slager, and
F. Nur Ünal. “Anomalous Multigap Topological Phases in Periodically Driven Quantum
Rotors.” Physical Review A. American Physical Society, 2026. https://doi.org/10.1103/db9d-9bns.
ieee: V. Karle, M. Lemeshko, A. Bouhon, R.-J. Slager, and F. N. Ünal, “Anomalous
multigap topological phases in periodically driven quantum rotors,” Physical
Review A, vol. 113, no. 1. American Physical Society, 2026.
ista: Karle V, Lemeshko M, Bouhon A, Slager R-J, Ünal FN. 2026. Anomalous multigap
topological phases in periodically driven quantum rotors. Physical Review A. 113(1),
012216.
mla: Karle, Volker, et al. “Anomalous Multigap Topological Phases in Periodically
Driven Quantum Rotors.” Physical Review A, vol. 113, no. 1, 012216, American
Physical Society, 2026, doi:10.1103/db9d-9bns.
short: V. Karle, M. Lemeshko, A. Bouhon, R.-J. Slager, F.N. Ünal, Physical Review
A 113 (2026).
corr_author: '1'
date_created: 2026-01-20T10:06:07Z
date_published: 2026-01-12T00:00:00Z
date_updated: 2026-03-16T12:21:55Z
day: '12'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/db9d-9bns
ec_funded: 1
external_id:
arxiv:
- '2408.16848'
file:
- access_level: open_access
checksum: ca62a5050a234c0554e2583b1c126057
content_type: application/pdf
creator: dernst
date_created: 2026-01-21T09:04:48Z
date_updated: 2026-01-21T09:04:48Z
file_id: '21029'
file_name: 2026_PhysicalReviewA_Karle.pdf
file_size: 2650256
relation: main_file
success: 1
file_date_updated: 2026-01-21T09:04:48Z
has_accepted_license: '1'
intvolume: ' 113'
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Anomalous multigap topological phases in periodically driven quantum rotors
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: 113
year: '2026'
...
---
OA_place: repository
OA_type: green
_id: '18821'
abstract:
- lang: eng
text: 'Even though the one-dimensional contact interaction requires no regularization,
renormalization methods have been shown to improve the convergence of numerical
calculations considerably. In this work, we compare and contrast these methods:
“the running coupling constant” where the two-body ground-state energy is used
as a renormalization condition, and two effective interaction approaches that
include information about the ground as well as excited states. In particular,
we calculate the energies and densities of few-fermion systems in a harmonic oscillator
with the configuration-interaction method and compare the results based upon renormalized
and bare interactions. We find that the use of the running coupling constant instead
of the bare interaction improves convergence significantly. A comparison with
an effective interaction, which is designed to reproduce the relative part of
the energy spectrum of two particles, showed a similar improvement. The effective
interaction provides an additional improvement if the center-of-mass excitations
are included in the construction. Finally, we discuss the transformation of observables
alongside the renormalization of the potential, and demonstrate that this might
be an essential ingredient for accurate numerical calculations.'
acknowledgement: We thank J. Cremon and J. Bjerlin for earlier contributions to the
configuration-interaction calculations used in this work (see Refs. [49,50]). F.B.
and S.M.R. acknowledge helpful discussions with Carl Heintze, Sandra Brandstetter,
and Lila Chergui. We further want to thank Lila Chergui for helpful comments on
the paper. This research was financially supported by the Knut and Alice Wallenberg
Foundation (Grant No. KAW 2018.0217) and the Swedish Research Council (Grant No.
2022-03654 VR).
article_number: '013303'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Fabian
full_name: Brauneis, Fabian
last_name: Brauneis
- first_name: Hans Werner
full_name: Hammer, Hans Werner
last_name: Hammer
- first_name: Stephanie M.
full_name: Reimann, Stephanie M.
last_name: Reimann
- first_name: Artem
full_name: Volosniev, Artem
id: 37D278BC-F248-11E8-B48F-1D18A9856A87
last_name: Volosniev
orcid: 0000-0003-0393-5525
citation:
ama: Brauneis F, Hammer HW, Reimann SM, Volosniev A. Comparison of renormalized
interactions using one-dimensional few-body systems as a testbed. Physical
Review A. 2025;111(1). doi:10.1103/PhysRevA.111.013303
apa: Brauneis, F., Hammer, H. W., Reimann, S. M., & Volosniev, A. (2025). Comparison
of renormalized interactions using one-dimensional few-body systems as a testbed.
Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.111.013303
chicago: Brauneis, Fabian, Hans Werner Hammer, Stephanie M. Reimann, and Artem Volosniev.
“Comparison of Renormalized Interactions Using One-Dimensional Few-Body Systems
as a Testbed.” Physical Review A. American Physical Society, 2025. https://doi.org/10.1103/PhysRevA.111.013303.
ieee: F. Brauneis, H. W. Hammer, S. M. Reimann, and A. Volosniev, “Comparison of
renormalized interactions using one-dimensional few-body systems as a testbed,”
Physical Review A, vol. 111, no. 1. American Physical Society, 2025.
ista: Brauneis F, Hammer HW, Reimann SM, Volosniev A. 2025. Comparison of renormalized
interactions using one-dimensional few-body systems as a testbed. Physical Review
A. 111(1), 013303.
mla: Brauneis, Fabian, et al. “Comparison of Renormalized Interactions Using One-Dimensional
Few-Body Systems as a Testbed.” Physical Review A, vol. 111, no. 1, 013303,
American Physical Society, 2025, doi:10.1103/PhysRevA.111.013303.
short: F. Brauneis, H.W. Hammer, S.M. Reimann, A. Volosniev, Physical Review A 111
(2025).
date_created: 2025-01-12T23:04:00Z
date_published: 2025-01-03T00:00:00Z
date_updated: 2025-02-27T12:41:58Z
day: '03'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.111.013303
external_id:
arxiv:
- '2408.10052'
isi:
- '001398791400004'
intvolume: ' 111'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2408.10052'
month: '01'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Comparison of renormalized interactions using one-dimensional few-body systems
as a testbed
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 111
year: '2025'
...
---
OA_place: repository
OA_type: green
_id: '19502'
abstract:
- lang: eng
text: Alkali dimers, Ak2, located on the surface of a helium nanodroplet, are set
into rotation through the polarizability interaction with a nonresonant 1-ps-long
laser pulse. The time-dependent degree of alignment is recorded using femtosecond-probe-pulse-induced
Coulomb explosion into a pair of Ak+ fragment ions. The results, obtained for
Na2, K2, and Rb2 in both the ground state 11Σ+g and the lowest-lying triplet state
13Σ+u, exhibit distinct, periodic revivals with a gradually decreasing amplitude.
The dynamics differ from that expected for dimers had they behaved as free rotors.
Numerically, we solve the time-dependent rotational Schrödinger equation, including
an effective mean-field potential to describe the interaction between the dimer
and the droplet. The experimental and simulated alignment dynamics agree well
and their comparison enables us to determine the effective rotational constants
of the alkali dimers with the exception of Rb2(13Σ+u) that only exhibits a prompt
alignment peak but no subsequent revivals. For Na2(13Σ+u), K2(11Σ+g), K2(13Σ+u)
and Rb2(11Σ+g), the alignment dynamics are well-described by a 2D rotor model.
We ascribe this to a significant confinement of the internuclear axis of these
dimers, induced by the orientation-dependent droplet-dimer interaction, to the
tangential plane of their residence point on the droplet.
acknowledgement: H.S. acknowledges support from the Villum Foundation through a Villum
Investigator Grant No. 25886. We thank Jan Thøgersen for expert help with the optics
and the laser system.
article_number: '033114'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Henrik H.
full_name: Kristensen, Henrik H.
last_name: Kristensen
- first_name: Lorenz
full_name: Kranabetter, Lorenz
last_name: Kranabetter
- first_name: Areg
full_name: Ghazaryan, Areg
id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
last_name: Ghazaryan
orcid: 0000-0001-9666-3543
- first_name: Constant A.
full_name: Schouder, Constant A.
last_name: Schouder
- first_name: Emil
full_name: Hansen, Emil
last_name: Hansen
- first_name: Frank
full_name: Jensen, Frank
last_name: Jensen
- first_name: Robert E.
full_name: Zillich, Robert E.
last_name: Zillich
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Henrik
full_name: Stapelfeldt, Henrik
last_name: Stapelfeldt
citation:
ama: Kristensen HH, Kranabetter L, Ghazaryan A, et al. Nonadiabatic laser-induced
alignment dynamics of alkali-metal dimers on the surface of a helium droplet.
Physical Review A. 2025;111(3). doi:10.1103/PhysRevA.111.033114
apa: Kristensen, H. H., Kranabetter, L., Ghazaryan, A., Schouder, C. A., Hansen,
E., Jensen, F., … Stapelfeldt, H. (2025). Nonadiabatic laser-induced alignment
dynamics of alkali-metal dimers on the surface of a helium droplet. Physical
Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.111.033114
chicago: Kristensen, Henrik H., Lorenz Kranabetter, Areg Ghazaryan, Constant A.
Schouder, Emil Hansen, Frank Jensen, Robert E. Zillich, Mikhail Lemeshko, and
Henrik Stapelfeldt. “Nonadiabatic Laser-Induced Alignment Dynamics of Alkali-Metal
Dimers on the Surface of a Helium Droplet.” Physical Review A. American
Physical Society, 2025. https://doi.org/10.1103/PhysRevA.111.033114.
ieee: H. H. Kristensen et al., “Nonadiabatic laser-induced alignment dynamics
of alkali-metal dimers on the surface of a helium droplet,” Physical Review
A, vol. 111, no. 3. American Physical Society, 2025.
ista: Kristensen HH, Kranabetter L, Ghazaryan A, Schouder CA, Hansen E, Jensen F,
Zillich RE, Lemeshko M, Stapelfeldt H. 2025. Nonadiabatic laser-induced alignment
dynamics of alkali-metal dimers on the surface of a helium droplet. Physical Review
A. 111(3), 033114.
mla: Kristensen, Henrik H., et al. “Nonadiabatic Laser-Induced Alignment Dynamics
of Alkali-Metal Dimers on the Surface of a Helium Droplet.” Physical Review
A, vol. 111, no. 3, 033114, American Physical Society, 2025, doi:10.1103/PhysRevA.111.033114.
short: H.H. Kristensen, L. Kranabetter, A. Ghazaryan, C.A. Schouder, E. Hansen,
F. Jensen, R.E. Zillich, M. Lemeshko, H. Stapelfeldt, Physical Review A 111 (2025).
date_created: 2025-04-06T22:01:32Z
date_published: 2025-03-21T00:00:00Z
date_updated: 2025-09-30T11:27:25Z
day: '21'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.111.033114
external_id:
arxiv:
- '2502.14521'
isi:
- '001459727400007'
intvolume: ' 111'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2502.14521
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the
surface of a helium droplet
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 111
year: '2025'
...
---
OA_place: publisher
OA_type: hybrid
_id: '19733'
abstract:
- lang: eng
text: One of the most striking quantum phenomena is superposition, where one particle
simultaneously inhabits different states. Most methods to verify coherent superposition
are indirect, in that they require the distinct states to be recombined. Here,
we adapt an xor game, in which a “test” photon is placed in a superposition of
two orthogonal spatial modes, and each mode is sent to separated parties who perform
local measurements on their modes without reinterfering the original modes. We
show that by using a second identical “measurement” photon the parties are nonetheless
able to verify if the test photon was placed in coherent superposition of the
two spatial modes. We then turn this game into a resource-efficient verification
scheme, obtaining a confidence that the particle is superposed which approaches
unity exponentially fast. We demonstrate our scheme using a single photon, obtaining
a 99% confidence that the particle is superposed with only 37 copies. Our work
shows the utility of xor games to verify quantum resources, allowing us to efficiently
detect quantum superposition without reinterfering the superposed modes.
acknowledgement: This project has received funding from the European Union's Horizon
2020 and Horizon Europe research and innovation programmes under Grant Agreements
No. 899368 (EPIQUS) and No. 101135288 (EPIQUE), the Marie Skłodowska-Curie Grant
Agreement No. 956071 (AppQInfo), and the QuantERA II Programme under Grant Agreement
No. 101017733 (PhoMemtor). The financial support by the Austrian Federal Ministry
of Labour and Economy, the National Foundation for Research, Technology and Development,
and the Christian Doppler Research Association is gratefully acknowledged. L.A.R.
acknowledges support from the Erwin Schrödinger Center for Quantum Science & Technology
(ESQ Discovery). This research was funded in whole or in part from the Austrian
Science Fund (FWF) through [Grant No. 10.55776/COE1] (Quantum Science Austria),
[Grant No. 10.55776/F71] (BeyondC), [Grant No. 10.55776/FG5] (Research Group 5),
[Grant No. 10.55776/I6002] (PhoMemtor), and [Grant No. 10.55776/P36994] (Quantum
Interference).
article_number: L050402
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Daniel
full_name: Kun, Daniel
last_name: Kun
- first_name: Karl T
full_name: Strömberg, Karl T
id: 68011cd2-da32-11ee-a930-b2774c7aba5f
last_name: Strömberg
- first_name: Michele
full_name: Spagnolo, Michele
last_name: Spagnolo
- first_name: Borivoje
full_name: Dakić, Borivoje
last_name: Dakić
- first_name: Lee A.
full_name: Rozema, Lee A.
last_name: Rozema
- first_name: Philip
full_name: Walther, Philip
last_name: Walther
citation:
ama: Kun D, Strömberg KT, Spagnolo M, Dakić B, Rozema LA, Walther P. Direct and
efficient detection of quantum superposition. Physical Review A. 2025;111(5).
doi:10.1103/PhysRevA.111.L050402
apa: Kun, D., Strömberg, K. T., Spagnolo, M., Dakić, B., Rozema, L. A., & Walther,
P. (2025). Direct and efficient detection of quantum superposition. Physical
Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.111.L050402
chicago: Kun, Daniel, Karl T Strömberg, Michele Spagnolo, Borivoje Dakić, Lee A.
Rozema, and Philip Walther. “Direct and Efficient Detection of Quantum Superposition.”
Physical Review A. American Physical Society, 2025. https://doi.org/10.1103/PhysRevA.111.L050402.
ieee: D. Kun, K. T. Strömberg, M. Spagnolo, B. Dakić, L. A. Rozema, and P. Walther,
“Direct and efficient detection of quantum superposition,” Physical Review
A, vol. 111, no. 5. American Physical Society, 2025.
ista: Kun D, Strömberg KT, Spagnolo M, Dakić B, Rozema LA, Walther P. 2025. Direct
and efficient detection of quantum superposition. Physical Review A. 111(5), L050402.
mla: Kun, Daniel, et al. “Direct and Efficient Detection of Quantum Superposition.”
Physical Review A, vol. 111, no. 5, L050402, American Physical Society,
2025, doi:10.1103/PhysRevA.111.L050402.
short: D. Kun, K.T. Strömberg, M. Spagnolo, B. Dakić, L.A. Rozema, P. Walther, Physical
Review A 111 (2025).
date_created: 2025-05-25T22:16:54Z
date_published: 2025-05-16T00:00:00Z
date_updated: 2025-09-30T12:40:18Z
day: '16'
ddc:
- '530'
department:
- _id: OnHo
doi: 10.1103/PhysRevA.111.L050402
external_id:
arxiv:
- '2405.08065'
isi:
- '001501941500006'
file:
- access_level: open_access
checksum: b83295a8f597b7781d8e7bfa3b393b42
content_type: application/pdf
creator: dernst
date_created: 2025-05-28T09:16:03Z
date_updated: 2025-05-28T09:16:03Z
file_id: '19755'
file_name: 2025_PhysReviewA_Kun.pdf
file_size: 571784
relation: main_file
success: 1
file_date_updated: 2025-05-28T09:16:03Z
has_accepted_license: '1'
intvolume: ' 111'
isi: 1
issue: '5'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Direct and efficient detection of quantum superposition
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: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 111
year: '2025'
...
---
OA_place: repository
OA_type: green
_id: '18629'
abstract:
- lang: eng
text: We study a three-dimensional Gross-Pitaevskii equation that describes a static
impurity in a dipolar Bose-Einstein condensate. Our focus is on the interplay
between the shape of the impurity and the anisotropy of the medium manifested
in the energy and the density of the system. Without external confinement, properties
of the system are derived with basic analytical approaches. For a system in a
harmonic trap, the model is investigated numerically, using the split-step Crank-Nicolson
method. Our results demonstrate that the impurity self-energy is minimized when
its shape more closely aligns with the anisotropic character of the bath; in particular
a prolate deformed impurity aligned with the direction of the dipoles has the
smallest self-energy for a repulsive impurity. Our work complements studies of
impurities in Bose gases with zero-range interactions and paves the way for studies
of dipolar polarons with a Gross-Pitaevskii equation.
acknowledgement: 'The authors acknowledge that this material is based upon work supported
by the National Science Foundation/EPSCoR RII Track-1: Emergent Quantum Materials
and Technologies (EQUATE), Award No. OIA-2044049.'
article_number: '053317'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Neelam
full_name: Shukla, Neelam
last_name: Shukla
- first_name: Artem
full_name: Volosniev, Artem
id: 37D278BC-F248-11E8-B48F-1D18A9856A87
last_name: Volosniev
orcid: 0000-0003-0393-5525
- first_name: Jeremy R.
full_name: Armstrong, Jeremy R.
last_name: Armstrong
citation:
ama: Shukla N, Volosniev A, Armstrong JR. Anisotropic potential immersed in a dipolar
Bose-Einstein condensate. Physical Review A. 2024;110(5). doi:10.1103/PhysRevA.110.053317
apa: Shukla, N., Volosniev, A., & Armstrong, J. R. (2024). Anisotropic potential
immersed in a dipolar Bose-Einstein condensate. Physical Review A. American
Physical Society. https://doi.org/10.1103/PhysRevA.110.053317
chicago: Shukla, Neelam, Artem Volosniev, and Jeremy R. Armstrong. “Anisotropic
Potential Immersed in a Dipolar Bose-Einstein Condensate.” Physical Review
A. American Physical Society, 2024. https://doi.org/10.1103/PhysRevA.110.053317.
ieee: N. Shukla, A. Volosniev, and J. R. Armstrong, “Anisotropic potential immersed
in a dipolar Bose-Einstein condensate,” Physical Review A, vol. 110, no.
5. American Physical Society, 2024.
ista: Shukla N, Volosniev A, Armstrong JR. 2024. Anisotropic potential immersed
in a dipolar Bose-Einstein condensate. Physical Review A. 110(5), 053317.
mla: Shukla, Neelam, et al. “Anisotropic Potential Immersed in a Dipolar Bose-Einstein
Condensate.” Physical Review A, vol. 110, no. 5, 053317, American Physical
Society, 2024, doi:10.1103/PhysRevA.110.053317.
short: N. Shukla, A. Volosniev, J.R. Armstrong, Physical Review A 110 (2024).
date_created: 2024-12-08T23:01:55Z
date_published: 2024-11-18T00:00:00Z
date_updated: 2025-09-08T14:56:22Z
day: '18'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.110.053317
external_id:
arxiv:
- '2406.00217'
isi:
- '001362623400019'
intvolume: ' 110'
isi: 1
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2406.00217
month: '11'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Anisotropic potential immersed in a dipolar Bose-Einstein condensate
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 110
year: '2024'
...
---
_id: '15167'
abstract:
- lang: eng
text: We perform a diagrammatic analysis of the energy of a mobile impurity immersed
in a strongly interacting two-component Fermi gas to second order in the impurity-bath
interaction. These corrections demonstrate divergent behavior in the limit of
large impurity momentum. We show the fundamental processes responsible for these
logarithmically divergent terms. We study the problem in the general case without
any assumptions regarding the fermion-fermion interactions in the bath. We show
that the divergent term can be summed up to all orders in the Fermi-Fermi interaction
and that the resulting expression is equivalent to the one obtained in the few-body
calculation. Finally, we provide a perturbative calculation to the second order
in the Fermi-Fermi interaction, and we show the diagrams responsible for these
terms.
acknowledgement: We thank Félix Werner and Kris Van Houcke for interesting discussions.
article_number: '033315'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ragheed
full_name: Al Hyder, Ragheed
id: d1c405be-ae15-11ed-8510-ccf53278162e
last_name: Al Hyder
- first_name: F.
full_name: Chevy, F.
last_name: Chevy
- first_name: X.
full_name: Leyronas, X.
last_name: Leyronas
citation:
ama: Al Hyder R, Chevy F, Leyronas X. Exploring beyond-mean-field logarithmic divergences
in Fermi-polaron energy. Physical Review A. 2024;109(3). doi:10.1103/PhysRevA.109.033315
apa: Al Hyder, R., Chevy, F., & Leyronas, X. (2024). Exploring beyond-mean-field
logarithmic divergences in Fermi-polaron energy. Physical Review A. American
Physical Society. https://doi.org/10.1103/PhysRevA.109.033315
chicago: Al Hyder, Ragheed, F. Chevy, and X. Leyronas. “Exploring Beyond-Mean-Field
Logarithmic Divergences in Fermi-Polaron Energy.” Physical Review A. American
Physical Society, 2024. https://doi.org/10.1103/PhysRevA.109.033315.
ieee: R. Al Hyder, F. Chevy, and X. Leyronas, “Exploring beyond-mean-field logarithmic
divergences in Fermi-polaron energy,” Physical Review A, vol. 109, no.
3. American Physical Society, 2024.
ista: Al Hyder R, Chevy F, Leyronas X. 2024. Exploring beyond-mean-field logarithmic
divergences in Fermi-polaron energy. Physical Review A. 109(3), 033315.
mla: Al Hyder, Ragheed, et al. “Exploring Beyond-Mean-Field Logarithmic Divergences
in Fermi-Polaron Energy.” Physical Review A, vol. 109, no. 3, 033315, American
Physical Society, 2024, doi:10.1103/PhysRevA.109.033315.
short: R. Al Hyder, F. Chevy, X. Leyronas, Physical Review A 109 (2024).
corr_author: '1'
date_created: 2024-03-24T23:00:59Z
date_published: 2024-03-19T00:00:00Z
date_updated: 2025-09-04T13:07:33Z
day: '19'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.109.033315
external_id:
arxiv:
- '2311.14536'
isi:
- '001198511300017'
intvolume: ' 109'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2311.14536
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 109
year: '2024'
...
---
_id: '15004'
abstract:
- lang: eng
text: The impulsive limit (the “sudden approximation”) has been widely employed
to describe the interaction between molecules and short, far-off-resonant laser
pulses. This approximation assumes that the timescale of the laser-molecule interaction
is significantly shorter than the internal rotational period of the molecule,
resulting in the rotational motion being instantaneously “frozen” during the interaction.
This simplified description of the laser-molecule interaction is incorporated
in various theoretical models predicting rotational dynamics of molecules driven
by short laser pulses. In this theoretical work, we develop an effective theory
for ultrashort laser pulses by examining the full time-evolution operator and
solving the time-dependent Schrödinger equation at the operator level. Our findings
reveal a critical angular momentum, lcrit, at which the impulsive limit breaks
down. In other words, the validity of the sudden approximation depends not only
on the pulse duration but also on its intensity, since the latter determines how
many angular momentum states are populated. We explore both ultrashort multicycle
(Gaussian) pulses and the somewhat less studied half-cycle pulses, which produce
distinct effective potentials. We discuss the limitations of the impulsive limit
and propose a method that rescales the effective matrix elements, enabling an
improved and more accurate description of laser-molecule interactions.
acknowledgement: We thank Bretislav Friedrich, Marjan Mirahmadi, Artem Volosniev,
and Burkhard Schmidt for insightful discussions. M.L. acknowledges support by the
European Research Council (ERC) under Starting Grant No. 801770 (ANGULON).
article_number: '023101'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Volker
full_name: Karle, Volker
id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425
last_name: Karle
orcid: 0000-0002-6963-0129
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: 'Karle V, Lemeshko M. Modeling laser pulses as δ kicks: Reevaluating the impulsive
limit in molecular rotational dynamics. Physical Review A. 2024;109(2).
doi:10.1103/PhysRevA.109.023101'
apa: 'Karle, V., & Lemeshko, M. (2024). Modeling laser pulses as δ kicks: Reevaluating
the impulsive limit in molecular rotational dynamics. Physical Review A.
American Physical Society. https://doi.org/10.1103/PhysRevA.109.023101'
chicago: 'Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks:
Reevaluating the Impulsive Limit in Molecular Rotational Dynamics.” Physical
Review A. American Physical Society, 2024. https://doi.org/10.1103/PhysRevA.109.023101.'
ieee: 'V. Karle and M. Lemeshko, “Modeling laser pulses as δ kicks: Reevaluating
the impulsive limit in molecular rotational dynamics,” Physical Review A,
vol. 109, no. 2. American Physical Society, 2024.'
ista: 'Karle V, Lemeshko M. 2024. Modeling laser pulses as δ kicks: Reevaluating
the impulsive limit in molecular rotational dynamics. Physical Review A. 109(2),
023101.'
mla: 'Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks: Reevaluating
the Impulsive Limit in Molecular Rotational Dynamics.” Physical Review A,
vol. 109, no. 2, 023101, American Physical Society, 2024, doi:10.1103/PhysRevA.109.023101.'
short: V. Karle, M. Lemeshko, Physical Review A 109 (2024).
corr_author: '1'
date_created: 2024-02-18T23:01:01Z
date_published: 2024-02-01T00:00:00Z
date_updated: 2026-04-07T11:48:53Z
day: '01'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.109.023101
ec_funded: 1
external_id:
arxiv:
- '2307.07256'
isi:
- '001158043800006'
intvolume: ' 109'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2307.07256
month: '02'
oa: 1
oa_version: Preprint
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '19393'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: 'Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular
rotational dynamics'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 109
year: '2024'
...
---
_id: '14553'
abstract:
- lang: eng
text: Quantum state tomography is an essential component of modern quantum technology.
In application to continuous-variable harmonic-oscillator systems, such as the
electromagnetic field, existing tomography methods typically reconstruct the state
in discrete bases, and are hence limited to states with relatively low amplitudes
and energies. Here, we overcome this limitation by utilizing a feed-forward neural
network to obtain the density matrix directly in the continuous position basis.
An important benefit of our approach is the ability to choose specific regions
in the phase space for detailed reconstruction. This results in a relatively slow
scaling of the amount of resources required for the reconstruction with the state
amplitude, and hence allows us to dramatically increase the range of amplitudes
accessible with our method.
article_number: '042430'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ekaterina
full_name: Fedotova, Ekaterina
id: c1bea5e1-878e-11ee-9dff-d7404e4422ab
last_name: Fedotova
orcid: 0000-0001-7242-015X
- first_name: Nikolai
full_name: Kuznetsov, Nikolai
last_name: Kuznetsov
- first_name: Egor
full_name: Tiunov, Egor
last_name: Tiunov
- first_name: A. E.
full_name: Ulanov, A. E.
last_name: Ulanov
- first_name: A. I.
full_name: Lvovsky, A. I.
last_name: Lvovsky
citation:
ama: Fedotova E, Kuznetsov N, Tiunov E, Ulanov AE, Lvovsky AI. Continuous-variable
quantum tomography of high-amplitude states. Physical Review A. 2023;108(4).
doi:10.1103/PhysRevA.108.042430
apa: Fedotova, E., Kuznetsov, N., Tiunov, E., Ulanov, A. E., & Lvovsky, A. I.
(2023). Continuous-variable quantum tomography of high-amplitude states. Physical
Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.108.042430
chicago: Fedotova, Ekaterina, Nikolai Kuznetsov, Egor Tiunov, A. E. Ulanov, and
A. I. Lvovsky. “Continuous-Variable Quantum Tomography of High-Amplitude States.”
Physical Review A. American Physical Society, 2023. https://doi.org/10.1103/PhysRevA.108.042430.
ieee: E. Fedotova, N. Kuznetsov, E. Tiunov, A. E. Ulanov, and A. I. Lvovsky, “Continuous-variable
quantum tomography of high-amplitude states,” Physical Review A, vol. 108,
no. 4. American Physical Society, 2023.
ista: Fedotova E, Kuznetsov N, Tiunov E, Ulanov AE, Lvovsky AI. 2023. Continuous-variable
quantum tomography of high-amplitude states. Physical Review A. 108(4), 042430.
mla: Fedotova, Ekaterina, et al. “Continuous-Variable Quantum Tomography of High-Amplitude
States.” Physical Review A, vol. 108, no. 4, 042430, American Physical
Society, 2023, doi:10.1103/PhysRevA.108.042430.
short: E. Fedotova, N. Kuznetsov, E. Tiunov, A.E. Ulanov, A.I. Lvovsky, Physical
Review A 108 (2023).
corr_author: '1'
date_created: 2023-11-19T23:00:54Z
date_published: 2023-10-30T00:00:00Z
date_updated: 2024-10-09T21:07:19Z
day: '30'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.108.042430
external_id:
arxiv:
- '2212.07406'
intvolume: ' 108'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2212.07406
month: '10'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Continuous-variable quantum tomography of high-amplitude states
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 108
year: '2023'
...
---
_id: '12819'
abstract:
- lang: eng
text: 'Reaching a high cavity population with a coherent pump in the strong-coupling
regime of a single-atom laser is impossible due to the photon blockade effect.
In this Letter, we experimentally demonstrate that in a single-atom maser based
on a transmon strongly coupled to two resonators, it is possible to pump over
a dozen photons into the system. The first high-quality resonator plays the role
of a usual lasing cavity, and the second one presents a controlled dissipation
channel, bolstering population inversion, and modifies the energy-level structure
to lift the blockade. As confirmation of the lasing action, we observe conventional
laser features such as a narrowing of the emission linewidth and external signal
amplification. Additionally, we report unique single-atom features: self-quenching
and several lasing thresholds.'
acknowledgement: We thank N.N. Abramov for assistance with the experimental setup.
The sample was fabricated using equipment of MIPT Shared Facilities Center. This
research was supported by Russian Science Foundation, grant no. 21-72-30026.
article_number: L031701
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Alesya
full_name: Sokolova, Alesya
id: 2d0a0600-edfb-11eb-afb5-c0f5fa7f4f3a
last_name: Sokolova
orcid: 0000-0002-8308-4144
- first_name: D. A.
full_name: Kalacheva, D. A.
last_name: Kalacheva
- first_name: G. P.
full_name: Fedorov, G. P.
last_name: Fedorov
- first_name: O. V.
full_name: Astafiev, O. V.
last_name: Astafiev
citation:
ama: Sokolova A, Kalacheva DA, Fedorov GP, Astafiev OV. Overcoming photon blockade
in a circuit-QED single-atom maser with engineered metastability and strong coupling.
Physical Review A. 2023;107(3). doi:10.1103/PhysRevA.107.L031701
apa: Sokolova, A., Kalacheva, D. A., Fedorov, G. P., & Astafiev, O. V. (2023).
Overcoming photon blockade in a circuit-QED single-atom maser with engineered
metastability and strong coupling. Physical Review A. American Physical
Society. https://doi.org/10.1103/PhysRevA.107.L031701
chicago: Sokolova, Alesya, D. A. Kalacheva, G. P. Fedorov, and O. V. Astafiev. “Overcoming
Photon Blockade in a Circuit-QED Single-Atom Maser with Engineered Metastability
and Strong Coupling.” Physical Review A. American Physical Society, 2023.
https://doi.org/10.1103/PhysRevA.107.L031701.
ieee: A. Sokolova, D. A. Kalacheva, G. P. Fedorov, and O. V. Astafiev, “Overcoming
photon blockade in a circuit-QED single-atom maser with engineered metastability
and strong coupling,” Physical Review A, vol. 107, no. 3. American Physical
Society, 2023.
ista: Sokolova A, Kalacheva DA, Fedorov GP, Astafiev OV. 2023. Overcoming photon
blockade in a circuit-QED single-atom maser with engineered metastability and
strong coupling. Physical Review A. 107(3), L031701.
mla: Sokolova, Alesya, et al. “Overcoming Photon Blockade in a Circuit-QED Single-Atom
Maser with Engineered Metastability and Strong Coupling.” Physical Review A,
vol. 107, no. 3, L031701, American Physical Society, 2023, doi:10.1103/PhysRevA.107.L031701.
short: A. Sokolova, D.A. Kalacheva, G.P. Fedorov, O.V. Astafiev, Physical Review
A 107 (2023).
date_created: 2023-04-09T22:01:00Z
date_published: 2023-03-22T00:00:00Z
date_updated: 2023-08-01T14:06:05Z
day: '22'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.107.L031701
external_id:
arxiv:
- '2209.05165'
isi:
- '000957799000006'
intvolume: ' 107'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2209.05165
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Overcoming photon blockade in a circuit-QED single-atom maser with engineered
metastability and strong coupling
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '12914'
abstract:
- lang: eng
text: We numerically study two methods of measuring tunneling times using a quantum
clock. In the conventional method using the Larmor clock, we show that the Larmor
tunneling time can be shorter for higher tunneling barriers. In the second method,
we study the probability of a spin-flip of a particle when it is transmitted through
a potential barrier including a spatially rotating field interacting with its
spin. According to the adiabatic theorem, the probability depends on the velocity
of the particle inside the barrier. It is numerically observed that the probability
increases for higher barriers, which is consistent with the result obtained by
the Larmor clock. By comparing outcomes for different initial spin states, we
suggest that one of the main causes of the apparent decrease in the tunneling
time can be the filtering effect occurring at the end of the barrier.
acknowledgement: We thank W. H. Zurek, N. Sinitsyn, M. O. Scully, M. Arndt, and C.
H. Marrows for helpful discussions. F.S. acknowledges support from the Los Alamos
National Laboratory LDRD program under Project No. 20230049DR and the Center for
Nonlinear Studies. F.S. also thanks the European Union’s Horizon 2020 research and
innovation program under the Marie Skłodowska-Curie Grant No. 754411 for support.
W.G.U. thanks the Natural Science and Engineering Research Council of Canada, the
Hagler Institute of Texas A&M University, the Helmholz Inst HZDR, Germany for support
while this work was being done.
article_number: '042216'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Fumika
full_name: Suzuki, Fumika
id: 650C99FC-1079-11EA-A3C0-73AE3DDC885E
last_name: Suzuki
orcid: 0000-0003-4982-5970
- first_name: William G.
full_name: Unruh, William G.
last_name: Unruh
citation:
ama: Suzuki F, Unruh WG. Numerical quantum clock simulations for measuring tunneling
times. Physical Review A. 2023;107(4). doi:10.1103/PhysRevA.107.042216
apa: Suzuki, F., & Unruh, W. G. (2023). Numerical quantum clock simulations
for measuring tunneling times. Physical Review A. American Physical Society.
https://doi.org/10.1103/PhysRevA.107.042216
chicago: Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations
for Measuring Tunneling Times.” Physical Review A. American Physical Society,
2023. https://doi.org/10.1103/PhysRevA.107.042216.
ieee: F. Suzuki and W. G. Unruh, “Numerical quantum clock simulations for measuring
tunneling times,” Physical Review A, vol. 107, no. 4. American Physical
Society, 2023.
ista: Suzuki F, Unruh WG. 2023. Numerical quantum clock simulations for measuring
tunneling times. Physical Review A. 107(4), 042216.
mla: Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations
for Measuring Tunneling Times.” Physical Review A, vol. 107, no. 4, 042216,
American Physical Society, 2023, doi:10.1103/PhysRevA.107.042216.
short: F. Suzuki, W.G. Unruh, Physical Review A 107 (2023).
corr_author: '1'
date_created: 2023-05-07T22:01:03Z
date_published: 2023-04-20T00:00:00Z
date_updated: 2025-04-14T07:44:01Z
day: '20'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.107.042216
ec_funded: 1
external_id:
arxiv:
- '2207.13130'
isi:
- '000975799300006'
intvolume: ' 107'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2207.13130
month: '04'
oa: 1
oa_version: Preprint
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Numerical quantum clock simulations for measuring tunneling times
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '13233'
abstract:
- lang: eng
text: We study the impact of finite-range physics on the zero-range-model analysis
of three-body recombination in ultracold atoms. We find that temperature dependence
of the zero-range parameters can vary from one set of measurements to another
as it may be driven by the distribution of error bars in the experiment, and not
by the underlying three-body physics. To study finite-temperature effects in three-body
recombination beyond the zero-range physics, we introduce and examine a finite-range
model based upon a hyperspherical formalism. The systematic error discussed in
this Letter may provide a significant contribution to the error bars of measured
three-body parameters.
acknowledgement: We thank Jan Arlt, Hans-Werner Hammer, and Karsten Riisager for useful
discussions. M.L. acknowledges support by the European Research Council (ERC) Starting
Grant No. 801770 (ANGULON).
article_number: L061304
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Sofya
full_name: Agafonova, Sofya
id: 09501ff6-dca7-11ea-a8ae-b3e0b9166e80
last_name: Agafonova
orcid: 0000-0003-0582-2946
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Artem
full_name: Volosniev, Artem
id: 37D278BC-F248-11E8-B48F-1D18A9856A87
last_name: Volosniev
orcid: 0000-0003-0393-5525
citation:
ama: Agafonova S, Lemeshko M, Volosniev A. Finite-range bias in fitting three-body
loss to the zero-range model. Physical Review A. 2023;107(6). doi:10.1103/PhysRevA.107.L061304
apa: Agafonova, S., Lemeshko, M., & Volosniev, A. (2023). Finite-range bias
in fitting three-body loss to the zero-range model. Physical Review A.
American Physical Society. https://doi.org/10.1103/PhysRevA.107.L061304
chicago: Agafonova, Sofya, Mikhail Lemeshko, and Artem Volosniev. “Finite-Range
Bias in Fitting Three-Body Loss to the Zero-Range Model.” Physical Review A.
American Physical Society, 2023. https://doi.org/10.1103/PhysRevA.107.L061304.
ieee: S. Agafonova, M. Lemeshko, and A. Volosniev, “Finite-range bias in fitting
three-body loss to the zero-range model,” Physical Review A, vol. 107,
no. 6. American Physical Society, 2023.
ista: Agafonova S, Lemeshko M, Volosniev A. 2023. Finite-range bias in fitting three-body
loss to the zero-range model. Physical Review A. 107(6), L061304.
mla: Agafonova, Sofya, et al. “Finite-Range Bias in Fitting Three-Body Loss to the
Zero-Range Model.” Physical Review A, vol. 107, no. 6, L061304, American
Physical Society, 2023, doi:10.1103/PhysRevA.107.L061304.
short: S. Agafonova, M. Lemeshko, A. Volosniev, Physical Review A 107 (2023).
corr_author: '1'
date_created: 2023-07-16T22:01:10Z
date_published: 2023-06-20T00:00:00Z
date_updated: 2025-04-14T07:48:53Z
day: '20'
department:
- _id: MiLe
- _id: OnHo
doi: 10.1103/PhysRevA.107.L061304
ec_funded: 1
external_id:
arxiv:
- '2302.01022'
isi:
- '001019748000005'
intvolume: ' 107'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2302.01022
month: '06'
oa: 1
oa_version: Preprint
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Finite-range bias in fitting three-body loss to the zero-range model
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '13125'
abstract:
- lang: eng
text: 'The quantum approximate optimization algorithm (QAOA) is a variational quantum
algorithm, where a quantum computer implements a variational ansatz consisting
of p layers of alternating unitary operators and a classical computer is used
to optimize the variational parameters. For a random initialization, the optimization
typically leads to local minima with poor performance, motivating the search for
initialization strategies of QAOA variational parameters. Although numerous heuristic
initializations exist, an analytical understanding and performance guarantees
for large p remain evasive.We introduce a greedy initialization of QAOA which
guarantees improving performance with an increasing number of layers. Our main
result is an analytic construction of 2p + 1 transition states—saddle points with
a unique negative curvature direction—for QAOA with p + 1 layers that use the
local minimum of QAOA with p layers. Transition states connect to new local minima,
which are guaranteed to lower the energy compared to the minimum found for p layers.
We use the GREEDY procedure to navigate the exponentially increasing with p number
of local minima resulting from the recursive application of our analytic construction.
The performance of the GREEDY procedure matches available initialization strategies
while providing a guarantee for the minimal energy to decrease with an increasing
number of layers p. '
acknowledgement: 'We thank V. Verteletskyi for a joint collaboration on numerical
studies of the QAOA during his internship at ISTA that inspired analytic results
on TS reported in this work. We acknowledge A. A. Mele and M. Brooks for discussions
and D. Egger, P. Love, and D. Wierichs for valuable feedback on the manuscript.
S.H.S., R.A.M., and M.S. acknowledge support by the European Research Council (ERC)
under the European Union’s Horizon 2020 research and innovation program (Grant Agreement
No. 850899). R.K. is supported by the SFB BeyondC (Grant No. F7107-N38) and the
project QuantumReady (FFG 896217). '
article_number: '062404'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Stefan
full_name: Sack, Stefan
id: dd622248-f6e0-11ea-865d-ce382a1c81a5
last_name: Sack
orcid: 0000-0001-5400-8508
- first_name: Raimel A
full_name: Medina Ramos, Raimel A
id: CE680B90-D85A-11E9-B684-C920E6697425
last_name: Medina Ramos
orcid: 0000-0002-5383-2869
- first_name: Richard
full_name: Kueng, Richard
last_name: Kueng
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
citation:
ama: Sack S, Medina Ramos RA, Kueng R, Serbyn M. Recursive greedy initialization
of the quantum approximate optimization algorithm with guaranteed improvement.
Physical Review A. 2023;107(6). doi:10.1103/physreva.107.062404
apa: Sack, S., Medina Ramos, R. A., Kueng, R., & Serbyn, M. (2023). Recursive
greedy initialization of the quantum approximate optimization algorithm with guaranteed
improvement. Physical Review A. American Physical Society. https://doi.org/10.1103/physreva.107.062404
chicago: Sack, Stefan, Raimel A Medina Ramos, Richard Kueng, and Maksym Serbyn.
“Recursive Greedy Initialization of the Quantum Approximate Optimization Algorithm
with Guaranteed Improvement.” Physical Review A. American Physical Society,
2023. https://doi.org/10.1103/physreva.107.062404.
ieee: S. Sack, R. A. Medina Ramos, R. Kueng, and M. Serbyn, “Recursive greedy initialization
of the quantum approximate optimization algorithm with guaranteed improvement,”
Physical Review A, vol. 107, no. 6. American Physical Society, 2023.
ista: Sack S, Medina Ramos RA, Kueng R, Serbyn M. 2023. Recursive greedy initialization
of the quantum approximate optimization algorithm with guaranteed improvement.
Physical Review A. 107(6), 062404.
mla: Sack, Stefan, et al. “Recursive Greedy Initialization of the Quantum Approximate
Optimization Algorithm with Guaranteed Improvement.” Physical Review A,
vol. 107, no. 6, 062404, American Physical Society, 2023, doi:10.1103/physreva.107.062404.
short: S. Sack, R.A. Medina Ramos, R. Kueng, M. Serbyn, Physical Review A 107 (2023).
corr_author: '1'
date_created: 2023-06-07T06:57:32Z
date_published: 2023-06-02T00:00:00Z
date_updated: 2026-04-28T22:30:23Z
day: '02'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.1103/physreva.107.062404
ec_funded: 1
external_id:
arxiv:
- '2209.01159'
isi:
- '001016927100012'
file:
- access_level: open_access
checksum: 0d71423888eeccaa60d8f41197f26306
content_type: application/pdf
creator: dernst
date_created: 2023-06-13T07:28:36Z
date_updated: 2023-06-13T07:28:36Z
file_id: '13131'
file_name: 2023_PhysRevA_Sack.pdf
file_size: 2524611
relation: main_file
success: 1
file_date_updated: 2023-06-13T07:28:36Z
has_accepted_license: '1'
intvolume: ' 107'
isi: 1
issue: '6'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 23841C26-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '850899'
name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control'
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '17208'
relation: dissertation_contains
status: public
- id: '14622'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Recursive greedy initialization of the quantum approximate optimization algorithm
with guaranteed improvement
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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '11591'
abstract:
- lang: eng
text: We investigate the deterministic generation and distribution of entanglement
in large quantum networks by driving distant qubits with the output fields of
a nondegenerate parametric amplifier. In this setting, the amplifier produces
a continuous Gaussian two-mode squeezed state, which acts as a quantum-correlated
reservoir for the qubits and relaxes them into a highly entangled steady state.
Here we are interested in the maximal amount of entanglement and the optimal entanglement
generation rates that can be achieved with this scheme under realistic conditions
taking, in particular, the finite amplifier bandwidth, waveguide losses, and propagation
delays into account. By combining exact numerical simulations of the full network
with approximate analytic results, we predict the optimal working point for the
amplifier and the corresponding qubit-qubit entanglement under various conditions.
Our findings show that this passive conversion of Gaussian into discrete-variable
entanglement offers a robust and experimentally very attractive approach for operating
large optical, microwave, or hybrid quantum networks, for which efficient parametric
amplifiers are currently developed.
acknowledgement: We thank T. Mavrogordatos and D. Zhu for initial contribution on
the presented topic and K. Fedorov for stimulating discussions on entangled microwave
beams. This work was supported by the Austrian Science Fund (FWF) through Grant
No. P32299 (PHONED) and the European Union’s Horizon 2020 research and innovation
programme under Grant Agreement No. 899354 (SuperQuLAN). Most of the computational
results presented were obtained using the CLIP cluster [65].
article_number: '062454'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: J.
full_name: Agustí, J.
last_name: Agustí
- first_name: Y.
full_name: Minoguchi, Y.
last_name: Minoguchi
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: P.
full_name: Rabl, P.
last_name: Rabl
citation:
ama: Agustí J, Minoguchi Y, Fink JM, Rabl P. Long-distance distribution of qubit-qubit
entanglement using Gaussian-correlated photonic beams. Physical Review A.
2022;105(6). doi:10.1103/PhysRevA.105.062454
apa: Agustí, J., Minoguchi, Y., Fink, J. M., & Rabl, P. (2022). Long-distance
distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams.
Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.105.062454
chicago: Agustí, J., Y. Minoguchi, Johannes M Fink, and P. Rabl. “Long-Distance
Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.”
Physical Review A. American Physical Society, 2022. https://doi.org/10.1103/PhysRevA.105.062454.
ieee: J. Agustí, Y. Minoguchi, J. M. Fink, and P. Rabl, “Long-distance distribution
of qubit-qubit entanglement using Gaussian-correlated photonic beams,” Physical
Review A, vol. 105, no. 6. American Physical Society, 2022.
ista: Agustí J, Minoguchi Y, Fink JM, Rabl P. 2022. Long-distance distribution of
qubit-qubit entanglement using Gaussian-correlated photonic beams. Physical Review
A. 105(6), 062454.
mla: Agustí, J., et al. “Long-Distance Distribution of Qubit-Qubit Entanglement
Using Gaussian-Correlated Photonic Beams.” Physical Review A, vol. 105,
no. 6, 062454, American Physical Society, 2022, doi:10.1103/PhysRevA.105.062454.
short: J. Agustí, Y. Minoguchi, J.M. Fink, P. Rabl, Physical Review A 105 (2022).
date_created: 2022-07-17T22:01:55Z
date_published: 2022-06-29T00:00:00Z
date_updated: 2025-04-14T07:53:28Z
day: '29'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.105.062454
ec_funded: 1
external_id:
arxiv:
- '2204.02993'
isi:
- '000824330200003'
intvolume: ' 105'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2204.02993'
month: '06'
oa: 1
oa_version: Preprint
project:
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated
photonic beams
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 105
year: '2022'
...
---
_id: '11592'
abstract:
- lang: eng
text: 'We compare recent experimental results [Science 375, 528 (2022)] of the superfluid
unitary Fermi gas near the critical temperature with a thermodynamic model based
on the elementary excitations of the system. We find good agreement between experimental
data and our theory for several quantities such as first sound, second sound,
and superfluid fraction. We also show that mode mixing between first and second
sound occurs. Finally, we characterize the response amplitude to a density perturbation:
Close to the critical temperature both first and second sound can be excited through
a density perturbation, whereas at lower temperatures only the first sound mode
exhibits a significant response.'
acknowledgement: The authors gratefully acknowledge stimulating discussions with T.
Enss, and thank an anonymous referee for suggestions and remarks that allowed us
to improve the original manuscript. This work is supported by the Deutsche Forschungsgemeinschaft
(DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-390900948
(the Heidelberg STRUCTURES Excellence Cluster).
article_number: '063329'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Giacomo
full_name: Bighin, Giacomo
id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
last_name: Bighin
orcid: 0000-0001-8823-9777
- first_name: Alberto
full_name: Cappellaro, Alberto
id: 9d13b3cb-30a2-11eb-80dc-f772505e8660
last_name: Cappellaro
orcid: 0000-0001-6110-2359
- first_name: L.
full_name: Salasnich, L.
last_name: Salasnich
citation:
ama: 'Bighin G, Cappellaro A, Salasnich L. Unitary Fermi superfluid near the critical
temperature: Thermodynamics and sound modes from elementary excitations. Physical
Review A. 2022;105(6). doi:10.1103/PhysRevA.105.063329'
apa: 'Bighin, G., Cappellaro, A., & Salasnich, L. (2022). Unitary Fermi superfluid
near the critical temperature: Thermodynamics and sound modes from elementary
excitations. Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.105.063329'
chicago: 'Bighin, Giacomo, Alberto Cappellaro, and L. Salasnich. “Unitary Fermi
Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from
Elementary Excitations.” Physical Review A. American Physical Society,
2022. https://doi.org/10.1103/PhysRevA.105.063329.'
ieee: 'G. Bighin, A. Cappellaro, and L. Salasnich, “Unitary Fermi superfluid near
the critical temperature: Thermodynamics and sound modes from elementary excitations,”
Physical Review A, vol. 105, no. 6. American Physical Society, 2022.'
ista: 'Bighin G, Cappellaro A, Salasnich L. 2022. Unitary Fermi superfluid near
the critical temperature: Thermodynamics and sound modes from elementary excitations.
Physical Review A. 105(6), 063329.'
mla: 'Bighin, Giacomo, et al. “Unitary Fermi Superfluid near the Critical Temperature:
Thermodynamics and Sound Modes from Elementary Excitations.” Physical Review
A, vol. 105, no. 6, 063329, American Physical Society, 2022, doi:10.1103/PhysRevA.105.063329.'
short: G. Bighin, A. Cappellaro, L. Salasnich, Physical Review A 105 (2022).
date_created: 2022-07-17T22:01:55Z
date_published: 2022-06-30T00:00:00Z
date_updated: 2023-08-03T12:00:11Z
day: '30'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.105.063329
external_id:
arxiv:
- '2206.03924'
isi:
- '000829758500010'
intvolume: ' 105'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2206.03924'
month: '06'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Unitary Fermi superfluid near the critical temperature: Thermodynamics and
sound modes from elementary excitations'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 105
year: '2022'
...
---
_id: '11997'
abstract:
- lang: eng
text: "We study the fate of an impurity in an ultracold heteronuclear Bose mixture,
focusing on the experimentally relevant case of a ⁴¹K - ⁸⁷Rb mixture, with the
impurity in a ⁴¹K hyperfine state. Our paper provides a comprehensive description
of an impurity in a BEC mixture with contact interactions across its phase diagram.
We present results for the miscible and immiscible regimes, as well as for the
impurity in a self-bound quantum droplet. Here, varying the interactions, we find
exotic states where the impurity localizes either at the center or\r\nat the surface
of the droplet. "
acknowledgement: We thank A. Simoni for providing the calculations of the intercomponent
scattering lengths. We gratefully acknowledge stimulating discussions with L. A.
Peña Ardila, R. Schmidt, H. Silva, V. Zampronio, and M. Prevedelli for careful reading.
G.B. acknowledges support from the Austrian Science Fund (FWF) under Project No.
M2641-N27. T.M. acknowledges CNPq for support through Bolsa de produtividade em
Pesquisa No. 311079/2015-6. This work is supported by the Deutsche Forschungsgemeinschaft
(DFG, German Research Foundation) under Germany's Excellence Strategy No. EXC2181/1-390900948
(the Heidelberg STRUCTURES Excellence Cluster). This work was supported by the Serrapilheira
Institute (Grant No. Serra-1812-27802). We thank the High-Performance Computing
Center (NPAD) at UFRN for providing computational resources.
article_number: '023301'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Giacomo
full_name: Bighin, Giacomo
id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
last_name: Bighin
orcid: 0000-0001-8823-9777
- first_name: A.
full_name: Burchianti, A.
last_name: Burchianti
- first_name: F.
full_name: Minardi, F.
last_name: Minardi
- first_name: T.
full_name: Macrì, T.
last_name: Macrì
citation:
ama: Bighin G, Burchianti A, Minardi F, Macrì T. Impurity in a heteronuclear two-component
Bose mixture. Physical Review A. 2022;106(2). doi:10.1103/PhysRevA.106.023301
apa: Bighin, G., Burchianti, A., Minardi, F., & Macrì, T. (2022). Impurity in
a heteronuclear two-component Bose mixture. Physical Review A. American
Physical Society. https://doi.org/10.1103/PhysRevA.106.023301
chicago: Bighin, Giacomo, A. Burchianti, F. Minardi, and T. Macrì. “Impurity in
a Heteronuclear Two-Component Bose Mixture.” Physical Review A. American
Physical Society, 2022. https://doi.org/10.1103/PhysRevA.106.023301.
ieee: G. Bighin, A. Burchianti, F. Minardi, and T. Macrì, “Impurity in a heteronuclear
two-component Bose mixture,” Physical Review A, vol. 106, no. 2. American
Physical Society, 2022.
ista: Bighin G, Burchianti A, Minardi F, Macrì T. 2022. Impurity in a heteronuclear
two-component Bose mixture. Physical Review A. 106(2), 023301.
mla: Bighin, Giacomo, et al. “Impurity in a Heteronuclear Two-Component Bose Mixture.”
Physical Review A, vol. 106, no. 2, 023301, American Physical Society,
2022, doi:10.1103/PhysRevA.106.023301.
short: G. Bighin, A. Burchianti, F. Minardi, T. Macrì, Physical Review A 106 (2022).
date_created: 2022-08-28T22:02:00Z
date_published: 2022-08-04T00:00:00Z
date_updated: 2025-04-14T08:57:11Z
day: '04'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.106.023301
external_id:
arxiv:
- '2109.07451'
isi:
- '000837953600006'
intvolume: ' 106'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2109.07451
month: '08'
oa: 1
oa_version: Preprint
project:
- _id: 26986C82-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: M02641
name: A path-integral approach to composite impurities
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Impurity in a heteronuclear two-component Bose mixture
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 106
year: '2022'
...
---
_id: '18191'
abstract:
- lang: eng
text: 'Large-scale quantum devices provide insights beyond the reach of classical
simulations. However, for a reliable and verifiable quantum simulation, the building
blocks of the quantum device require exquisite benchmarking. This benchmarking
of large-scale dynamical quantum systems represents a major challenge due to lack
of efficient tools for their simulation. Here, we present a scalable algorithm
based on neural networks for Hamiltonian tomography in out-of-equilibrium quantum
systems. We illustrate our approach using a model for a forefront quantum simulation
platform: ultracold atoms in optical lattices. Specifically, we show that our
algorithm is able to reconstruct the Hamiltonian of an arbitrary sized bosonic
ladder system using an accessible amount of experimental measurements. We are
able to significantly increase the previously known parameter precision.'
article_number: '023302'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Agnes
full_name: Valenti, Agnes
last_name: Valenti
- first_name: Guliuxin
full_name: Jin, Guliuxin
last_name: Jin
- first_name: Julian
full_name: Leonard, Julian
id: b75b3f45-7995-11ef-9bfd-9a9cd02c3577
last_name: Leonard
- first_name: Sebastian D.
full_name: Huber, Sebastian D.
last_name: Huber
- first_name: Eliska
full_name: Greplova, Eliska
last_name: Greplova
citation:
ama: Valenti A, Jin G, Leonard J, Huber SD, Greplova E. Scalable Hamiltonian learning
for large-scale out-of-equilibrium quantum dynamics. Physical Review A.
2022;105(2). doi:10.1103/physreva.105.023302
apa: Valenti, A., Jin, G., Leonard, J., Huber, S. D., & Greplova, E. (2022).
Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics.
Physical Review A. American Physical Society. https://doi.org/10.1103/physreva.105.023302
chicago: Valenti, Agnes, Guliuxin Jin, Julian Leonard, Sebastian D. Huber, and Eliska
Greplova. “Scalable Hamiltonian Learning for Large-Scale out-of-Equilibrium Quantum
Dynamics.” Physical Review A. American Physical Society, 2022. https://doi.org/10.1103/physreva.105.023302.
ieee: A. Valenti, G. Jin, J. Leonard, S. D. Huber, and E. Greplova, “Scalable Hamiltonian
learning for large-scale out-of-equilibrium quantum dynamics,” Physical Review
A, vol. 105, no. 2. American Physical Society, 2022.
ista: Valenti A, Jin G, Leonard J, Huber SD, Greplova E. 2022. Scalable Hamiltonian
learning for large-scale out-of-equilibrium quantum dynamics. Physical Review
A. 105(2), 023302.
mla: Valenti, Agnes, et al. “Scalable Hamiltonian Learning for Large-Scale out-of-Equilibrium
Quantum Dynamics.” Physical Review A, vol. 105, no. 2, 023302, American
Physical Society, 2022, doi:10.1103/physreva.105.023302.
short: A. Valenti, G. Jin, J. Leonard, S.D. Huber, E. Greplova, Physical Review
A 105 (2022).
date_created: 2024-10-07T11:46:53Z
date_published: 2022-02-01T00:00:00Z
date_updated: 2024-10-08T10:00:23Z
day: '01'
doi: 10.1103/physreva.105.023302
extern: '1'
external_id:
arxiv:
- '2103.01240'
intvolume: ' 105'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2103.01240
month: '02'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 105
year: '2022'
...
---
_id: '13997'
abstract:
- lang: eng
text: We investigate theoretically the strong-field regime of light-matter interactions
in the topological-insulator class of quantum materials. In particular, we focus
on the process of nonperturbative high-order harmonic generation from the paradigmatic
three-dimensional topological insulator bismuth selenide (Bi2Se3) subjected to
intense midinfrared laser fields. We analyze the contributions from the spin-orbit-coupled
bulk states and the topological surface bands separately and reveal a major difference
in how their harmonic yields depend on the ellipticity of the laser field. Bulk
harmonics show a monotonic decrease in their yield as the ellipticity increases,
in a manner reminiscent of high harmonic generation in gaseous media. However,
the surface contribution exhibits a highly nontrivial dependence, culminating
with a maximum for circularly polarized fields. We attribute the observed anomalous
behavior to (i) the enhanced amplitude and the circular pattern of the interband
dipole and the Berry connections in the vicinity of the Dirac point and (ii) the
influence of the higher-order, hexagonal warping terms in the Hamiltonian, which
are responsible for the hexagonal deformation of the energy surface at higher
momenta. The latter are associated directly with spin-orbit-coupling parameters.
Our results thus establish the sensitivity of strong-field-driven high harmonic
emission to the topology of the band structure as well as to the manifestations
of spin-orbit interaction.
article_number: '023101'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Denitsa Rangelova
full_name: Baykusheva, Denitsa Rangelova
id: 71b4d059-2a03-11ee-914d-dfa3beed6530
last_name: Baykusheva
- first_name: Alexis
full_name: Chacón, Alexis
last_name: Chacón
- first_name: Dasol
full_name: Kim, Dasol
last_name: Kim
- first_name: Dong Eon
full_name: Kim, Dong Eon
last_name: Kim
- first_name: David A.
full_name: Reis, David A.
last_name: Reis
- first_name: Shambhu
full_name: Ghimire, Shambhu
last_name: Ghimire
citation:
ama: Baykusheva DR, Chacón A, Kim D, Kim DE, Reis DA, Ghimire S. Strong-field physics
in three-dimensional topological insulators. Physical Review A. 2021;103(2).
doi:10.1103/physreva.103.023101
apa: Baykusheva, D. R., Chacón, A., Kim, D., Kim, D. E., Reis, D. A., & Ghimire,
S. (2021). Strong-field physics in three-dimensional topological insulators. Physical
Review A. American Physical Society. https://doi.org/10.1103/physreva.103.023101
chicago: Baykusheva, Denitsa Rangelova, Alexis Chacón, Dasol Kim, Dong Eon Kim,
David A. Reis, and Shambhu Ghimire. “Strong-Field Physics in Three-Dimensional
Topological Insulators.” Physical Review A. American Physical Society,
2021. https://doi.org/10.1103/physreva.103.023101.
ieee: D. R. Baykusheva, A. Chacón, D. Kim, D. E. Kim, D. A. Reis, and S. Ghimire,
“Strong-field physics in three-dimensional topological insulators,” Physical
Review A, vol. 103, no. 2. American Physical Society, 2021.
ista: Baykusheva DR, Chacón A, Kim D, Kim DE, Reis DA, Ghimire S. 2021. Strong-field
physics in three-dimensional topological insulators. Physical Review A. 103(2),
023101.
mla: Baykusheva, Denitsa Rangelova, et al. “Strong-Field Physics in Three-Dimensional
Topological Insulators.” Physical Review A, vol. 103, no. 2, 023101, American
Physical Society, 2021, doi:10.1103/physreva.103.023101.
short: D.R. Baykusheva, A. Chacón, D. Kim, D.E. Kim, D.A. Reis, S. Ghimire, Physical
Review A 103 (2021).
date_created: 2023-08-09T13:09:26Z
date_published: 2021-02-01T00:00:00Z
date_updated: 2024-10-14T12:26:26Z
day: '01'
doi: 10.1103/physreva.103.023101
extern: '1'
external_id:
arxiv:
- '2008.01265'
intvolume: ' 103'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2008.01265
month: '02'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Strong-field physics in three-dimensional topological insulators
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 103
year: '2021'
...
---
_id: '10631'
abstract:
- lang: eng
text: We combine experimental and theoretical approaches to explore excited rotational
states of molecules embedded in helium nanodroplets using CS2 and I2 as examples.
Laser-induced nonadiabatic molecular alignment is employed to measure spectral
lines for rotational states extending beyond those initially populated at the
0.37 K droplet temperature. We construct a simple quantum-mechanical model, based
on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational
energy structure in its entirety. The calculated and measured spectral lines are
in good agreement. We show that the effect of the surrounding superfluid on molecular
rotation can be rationalized by a single quantity, the angular momentum, transferred
from the molecule to the droplet.
acknowledgement: I.C. acknowledges the support by the European Union’s Horizon 2020
research and innovation programme under the Marie Sklodowska-Curie Grant Agreement
No. 665385. G.B. acknowledges support from the Austrian Science Fund (FWF), under
project No. M2461-N27. M.L. acknowledges support by the Austrian Science Fund (FWF),
under project No. P29902-N27, and by the European Research Council (ERC) Starting
Grant No. 801770 (ANGULON). H.S acknowledges support from the European Research
Council-AdG (Project No. 320459, DropletControl) and from The Villum Foundation
through a Villum Investigator grant no. 25886.
article_number: L061303
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Igor
full_name: Cherepanov, Igor
id: 339C7E5A-F248-11E8-B48F-1D18A9856A87
last_name: Cherepanov
- first_name: Giacomo
full_name: Bighin, Giacomo
id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
last_name: Bighin
orcid: 0000-0001-8823-9777
- first_name: Constant A.
full_name: Schouder, Constant A.
last_name: Schouder
- first_name: Adam S.
full_name: Chatterley, Adam S.
last_name: Chatterley
- first_name: Simon H.
full_name: Albrechtsen, Simon H.
last_name: Albrechtsen
- first_name: Alberto Viñas
full_name: Muñoz, Alberto Viñas
last_name: Muñoz
- first_name: Lars
full_name: Christiansen, Lars
last_name: Christiansen
- first_name: Henrik
full_name: Stapelfeldt, Henrik
last_name: Stapelfeldt
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Cherepanov I, Bighin G, Schouder CA, et al. Excited rotational states of molecules
in a superfluid. Physical Review A. 2021;104(6). doi:10.1103/PhysRevA.104.L061303
apa: Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Albrechtsen,
S. H., Muñoz, A. V., … Lemeshko, M. (2021). Excited rotational states of molecules
in a superfluid. Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.104.L061303
chicago: Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley,
Simon H. Albrechtsen, Alberto Viñas Muñoz, Lars Christiansen, Henrik Stapelfeldt,
and Mikhail Lemeshko. “Excited Rotational States of Molecules in a Superfluid.”
Physical Review A. American Physical Society, 2021. https://doi.org/10.1103/PhysRevA.104.L061303.
ieee: I. Cherepanov et al., “Excited rotational states of molecules in a
superfluid,” Physical Review A, vol. 104, no. 6. American Physical Society,
2021.
ista: Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Albrechtsen SH, Muñoz
AV, Christiansen L, Stapelfeldt H, Lemeshko M. 2021. Excited rotational states
of molecules in a superfluid. Physical Review A. 104(6), L061303.
mla: Cherepanov, Igor, et al. “Excited Rotational States of Molecules in a Superfluid.”
Physical Review A, vol. 104, no. 6, L061303, American Physical Society,
2021, doi:10.1103/PhysRevA.104.L061303.
short: I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, S.H. Albrechtsen,
A.V. Muñoz, L. Christiansen, H. Stapelfeldt, M. Lemeshko, Physical Review A 104
(2021).
corr_author: '1'
date_created: 2022-01-16T23:01:29Z
date_published: 2021-12-30T00:00:00Z
date_updated: 2025-03-31T16:00:55Z
day: '30'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.104.L061303
ec_funded: 1
external_id:
arxiv:
- '2107.00468'
isi:
- '000739618300001'
intvolume: ' 104'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://128.84.4.18/abs/2107.00468
month: '12'
oa: 1
oa_version: Preprint
project:
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '801770'
name: 'Angulon: physics and applications of a new quasiparticle'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 26986C82-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: M02641
name: A path-integral approach to composite impurities
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Excited rotational states of molecules in a superfluid
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 104
year: '2021'
...
---
_id: '9242'
abstract:
- lang: eng
text: In the recent years important experimental advances in resonant electro-optic
modulators as high-efficiency sources for coherent frequency combs and as devices
for quantum information transfer have been realized, where strong optical and
microwave mode coupling were achieved. These features suggest electro-optic-based
devices as candidates for entangled optical frequency comb sources. In the present
work, I study the generation of entangled optical frequency combs in millimeter-sized
resonant electro-optic modulators. These devices profit from the experimentally
proven advantages such as nearly constant optical free spectral ranges over several
gigahertz, and high optical and microwave quality factors. The generation of frequency
multiplexed quantum channels with spectral bandwidth in the MHz range for conservative
parameter values paves the way towards novel uses in long-distance hybrid quantum
networks, quantum key distribution, enhanced optical metrology, and quantum computing.
acknowledgement: "I thank Prof. Shabir Barzanjeh and Dr. Ulrich Vogl for the fruitful
discussions.\r\n"
article_number: '023708'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Alfredo R
full_name: Rueda Sanchez, Alfredo R
id: 3B82B0F8-F248-11E8-B48F-1D18A9856A87
last_name: Rueda Sanchez
orcid: 0000-0001-6249-5860
citation:
ama: Rueda Sanchez AR. Frequency-multiplexed hybrid optical entangled source based
on the Pockels effect. Physical Review A. 2021;103(2). doi:10.1103/PhysRevA.103.023708
apa: Rueda Sanchez, A. R. (2021). Frequency-multiplexed hybrid optical entangled
source based on the Pockels effect. Physical Review A. American Physical
Society. https://doi.org/10.1103/PhysRevA.103.023708
chicago: Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled
Source Based on the Pockels Effect.” Physical Review A. American Physical
Society, 2021. https://doi.org/10.1103/PhysRevA.103.023708.
ieee: A. R. Rueda Sanchez, “Frequency-multiplexed hybrid optical entangled source
based on the Pockels effect,” Physical Review A, vol. 103, no. 2. American
Physical Society, 2021.
ista: Rueda Sanchez AR. 2021. Frequency-multiplexed hybrid optical entangled source
based on the Pockels effect. Physical Review A. 103(2), 023708.
mla: Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled Source
Based on the Pockels Effect.” Physical Review A, vol. 103, no. 2, 023708,
American Physical Society, 2021, doi:10.1103/PhysRevA.103.023708.
short: A.R. Rueda Sanchez, Physical Review A 103 (2021).
date_created: 2021-03-14T23:01:33Z
date_published: 2021-02-11T00:00:00Z
date_updated: 2023-08-07T14:11:18Z
day: '11'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.103.023708
external_id:
arxiv:
- '2010.05356'
isi:
- '000617037900013'
intvolume: ' 103'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2010.05356
month: '02'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Frequency-multiplexed hybrid optical entangled source based on the Pockels
effect
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 103
year: '2021'
...
---
_id: '9606'
abstract:
- lang: eng
text: Sound propagation is a macroscopic manifestation of the interplay between
the equilibrium thermodynamics and the dynamical transport properties of fluids.
Here, for a two-dimensional system of ultracold fermions, we calculate the first
and second sound velocities across the whole BCS-BEC crossover, and we analyze
the system response to an external perturbation. In the low-temperature regime
we reproduce the recent measurements [Phys. Rev. Lett. 124, 240403 (2020)] of
the first sound velocity, which, due to the decoupling of density and entropy
fluctuations, is the sole mode excited by a density probe. Conversely, a heat
perturbation excites only the second sound, which, being sensitive to the superfluid
depletion, vanishes in the deep BCS regime and jumps discontinuously to zero at
the Berezinskii-Kosterlitz-Thouless superfluid transition. A mixing between the
modes occurs only in the finite-temperature BEC regime, where our theory converges
to the purely bosonic results.
acknowledgement: "G.B. acknowledges support from the Austrian Science Fund (FWF),
under Project No. M2641-N27. This work was\r\npartially supported by the University
of Padua, BIRD project “Superfluid properties of Fermi gases in optical potentials.”\r\nThe
authors thank Miki Ota, Tomoki Ozawa, Sandro Stringari, Tilman Enss, Hauke Biss,
Henning Moritz, and Nicolò Defenu for fruitful discussions. The authors thank Henning
Moritz and Markus Bohlen for providing their experimental\r\ndata."
article_number: L061303
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: A.
full_name: Tononi, A.
last_name: Tononi
- first_name: Alberto
full_name: Cappellaro, Alberto
id: 9d13b3cb-30a2-11eb-80dc-f772505e8660
last_name: Cappellaro
orcid: 0000-0001-6110-2359
- first_name: Giacomo
full_name: Bighin, Giacomo
id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
last_name: Bighin
orcid: 0000-0001-8823-9777
- first_name: L.
full_name: Salasnich, L.
last_name: Salasnich
citation:
ama: Tononi A, Cappellaro A, Bighin G, Salasnich L. Propagation of first and second
sound in a two-dimensional Fermi superfluid. Physical Review A. 2021;103(6).
doi:10.1103/PhysRevA.103.L061303
apa: Tononi, A., Cappellaro, A., Bighin, G., & Salasnich, L. (2021). Propagation
of first and second sound in a two-dimensional Fermi superfluid. Physical Review
A. American Physical Society. https://doi.org/10.1103/PhysRevA.103.L061303
chicago: Tononi, A., Alberto Cappellaro, Giacomo Bighin, and L. Salasnich. “Propagation
of First and Second Sound in a Two-Dimensional Fermi Superfluid.” Physical
Review A. American Physical Society, 2021. https://doi.org/10.1103/PhysRevA.103.L061303.
ieee: A. Tononi, A. Cappellaro, G. Bighin, and L. Salasnich, “Propagation of first
and second sound in a two-dimensional Fermi superfluid,” Physical Review A,
vol. 103, no. 6. American Physical Society, 2021.
ista: Tononi A, Cappellaro A, Bighin G, Salasnich L. 2021. Propagation of first
and second sound in a two-dimensional Fermi superfluid. Physical Review A. 103(6),
L061303.
mla: Tononi, A., et al. “Propagation of First and Second Sound in a Two-Dimensional
Fermi Superfluid.” Physical Review A, vol. 103, no. 6, L061303, American
Physical Society, 2021, doi:10.1103/PhysRevA.103.L061303.
short: A. Tononi, A. Cappellaro, G. Bighin, L. Salasnich, Physical Review A 103
(2021).
date_created: 2021-06-27T22:01:49Z
date_published: 2021-06-01T00:00:00Z
date_updated: 2025-07-10T12:01:58Z
day: '01'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.103.L061303
external_id:
arxiv:
- '2009.06491'
isi:
- '000662296700014'
intvolume: ' 103'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2009.06491
month: '06'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Propagation of first and second sound in a two-dimensional Fermi superfluid
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 103
year: '2021'
...