---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '18176'
abstract:
- lang: eng
text: Introducing a class of SU(2) invariant quantum unitary circuits generating
chiral transport, we examine the role of broken space-reflection and time-reversal
symmetries on spin-transport properties. Upon adjusting parameters of local unitary
gates, the dynamics can be either chaotic or integrable. The latter corresponds
to a generalization of the space-time discretized (Trotterized) higher-spin quantum
Heisenberg chain. We demonstrate that breaking of space-reflection symmetry results
in a drift in the dynamical spin susceptibility. Remarkably, we find a universal
drift velocity given by a simple formula, which, at zero average magnetization,
depends only on the values of SU(2) Casimir invariants associated with local spins.
In the integrable case, the drift velocity formula is confirmed analytically based
on the exact solution of thermodynamic Bethe ansatz equations. Finally, by inspecting
the large fluctuations of the time-integrated current between two halves of the
system in stationary maximum-entropy states, we demonstrate violation of the Gallavotti-Cohen
symmetry, implying that such states cannot be regarded as equilibrium ones. We
show that the scaled cumulant generating function of the time-integrated current
instead obeys a generalized fluctuation relation.
acknowledgement: "The authors thank Denis Bernard, Jérôme Dubail, Hosho Katsura, Kareljan
Schoutens, and Alberto Zorzato for stimulating discussions. This work has been supported
by: Slovenian Research Agency (ARIS) under Grants No. N1-0219 (T.P., L.Z.), No.
N1-0334 (T.P., L.Z.), No. N1-0243 (E.I.), and under Research Program P1-0402 (E.I.,
T.P., L.Z.). European Research Council (ERC) under Consolidator Grant No. 771536—NEMO
(L.Z.), Advanced Grant No.\r\n101096208—QUEST (T.P., L.Z.), and Starting Grant No.
850899—NEQuM (M.L.). Simons Foundation under Simons Junior Fellowship Grant No.
1141511 (Ž.K.). M.L. acknowledges the hospitality of the Aspen Center for Physics,
which is supported by National Science Foundation Grant No. PHY-2210452. Numerical
simulations were performed using the ITensor library [117]. "
article_number: '030356'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Lenart
full_name: Zadnik, Lenart
last_name: Zadnik
- first_name: Marko
full_name: Ljubotina, Marko
id: F75EE9BE-5C90-11EA-905D-16643DDC885E
last_name: Ljubotina
orcid: 0000-0003-0038-7068
- first_name: Žiga
full_name: Krajnik, Žiga
last_name: Krajnik
- first_name: Enej
full_name: Ilievski, Enej
last_name: Ilievski
- first_name: Tomaž
full_name: Prosen, Tomaž
last_name: Prosen
citation:
ama: Zadnik L, Ljubotina M, Krajnik Ž, Ilievski E, Prosen T. Quantum many-body spin
ratchets. PRX Quantum. 2024;5(3). doi:10.1103/PRXQuantum.5.030356
apa: Zadnik, L., Ljubotina, M., Krajnik, Ž., Ilievski, E., & Prosen, T. (2024).
Quantum many-body spin ratchets. PRX Quantum. American Physical Society.
https://doi.org/10.1103/PRXQuantum.5.030356
chicago: Zadnik, Lenart, Marko Ljubotina, Žiga Krajnik, Enej Ilievski, and Tomaž
Prosen. “Quantum Many-Body Spin Ratchets.” PRX Quantum. American Physical
Society, 2024. https://doi.org/10.1103/PRXQuantum.5.030356.
ieee: L. Zadnik, M. Ljubotina, Ž. Krajnik, E. Ilievski, and T. Prosen, “Quantum
many-body spin ratchets,” PRX Quantum, vol. 5, no. 3. American Physical
Society, 2024.
ista: Zadnik L, Ljubotina M, Krajnik Ž, Ilievski E, Prosen T. 2024. Quantum many-body
spin ratchets. PRX Quantum. 5(3), 030356.
mla: Zadnik, Lenart, et al. “Quantum Many-Body Spin Ratchets.” PRX Quantum,
vol. 5, no. 3, 030356, American Physical Society, 2024, doi:10.1103/PRXQuantum.5.030356.
short: L. Zadnik, M. Ljubotina, Ž. Krajnik, E. Ilievski, T. Prosen, PRX Quantum
5 (2024).
das_tickbox: '0'
date_created: 2024-10-06T22:01:12Z
date_published: 2024-09-25T00:00:00Z
date_updated: 2026-10-16T12:13:08Z
day: '25'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.1103/PRXQuantum.5.030356
ec_funded: 1
external_id:
arxiv:
- '2406.01571'
isi:
- '001327172800001'
file:
- access_level: open_access
checksum: bc230631255d3bcf8bcbbc8fdbfefcf2
content_type: application/pdf
creator: dernst
date_created: 2024-10-07T11:04:12Z
date_updated: 2024-10-07T11:04:12Z
file_id: '18183'
file_name: 2024_PRXQuantum_Zadnik.pdf
file_size: 1061648
relation: main_file
success: 1
file_date_updated: 2024-10-07T11:04:12Z
fulldoi: https://doi.org/10.1103/PRXQuantum.5.030356
has_accepted_license: '1'
intvolume: ' 5'
isi: 1
issue: '3'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '09'
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: PRX Quantum
publication_identifier:
eissn:
- 2691-3399
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Quantum many-body spin ratchets
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: 5
year: '2024'
...
---
DOAJ_listed: '1'
_id: '15122'
abstract:
- lang: eng
text: Quantum computers are increasing in size and quality but are still very noisy.
Error mitigation extends the size of the quantum circuits that noisy devices can
meaningfully execute. However, state-of-the-art error mitigation methods are hard
to implement and the limited qubit connectivity in superconducting qubit devices
restricts most applications to the hardware's native topology. Here we show a
quantum approximate optimization algorithm (QAOA) on nonplanar random regular
graphs with up to 40 nodes enabled by a machine learning-based error mitigation.
We use a swap network with careful decision-variable-to-qubit mapping and a feed-forward
neural network to optimize a depth-two QAOA on up to 40 qubits. We observe a meaningful
parameter optimization for the largest graph which requires running quantum circuits
with 958 two-qubit gates. Our paper emphasizes the need to mitigate samples, and
not only expectation values, in quantum approximate optimization. These results
are a step towards executing quantum approximate optimization at a scale that
is not classically simulable. Reaching such system sizes is key to properly understanding
the true potential of heuristic algorithms like QAOA.
acknowledgement: S.H.S. acknowledges support from the IBM Ph.D. fellowship 2022 in
quantum computing. The authors also thank M. Serbyn, R. Kueng, R. A. Medina, and
S. Woerner for fruitful discussions.
article_number: '013223'
article_processing_charge: Yes
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: Daniel J.
full_name: Egger, Daniel J.
last_name: Egger
citation:
ama: Sack S, Egger DJ. Large-scale quantum approximate optimization on nonplanar
graphs with machine learning noise mitigation. Physical Review Research.
2024;6(1). doi:10.1103/PhysRevResearch.6.013223
apa: Sack, S., & Egger, D. J. (2024). Large-scale quantum approximate optimization
on nonplanar graphs with machine learning noise mitigation. Physical Review
Research. American Physical Society. https://doi.org/10.1103/PhysRevResearch.6.013223
chicago: Sack, Stefan, and Daniel J. Egger. “Large-Scale Quantum Approximate Optimization
on Nonplanar Graphs with Machine Learning Noise Mitigation.” Physical Review
Research. American Physical Society, 2024. https://doi.org/10.1103/PhysRevResearch.6.013223.
ieee: S. Sack and D. J. Egger, “Large-scale quantum approximate optimization on
nonplanar graphs with machine learning noise mitigation,” Physical Review Research,
vol. 6, no. 1. American Physical Society, 2024.
ista: Sack S, Egger DJ. 2024. Large-scale quantum approximate optimization on nonplanar
graphs with machine learning noise mitigation. Physical Review Research. 6(1),
013223.
mla: Sack, Stefan, and Daniel J. Egger. “Large-Scale Quantum Approximate Optimization
on Nonplanar Graphs with Machine Learning Noise Mitigation.” Physical Review
Research, vol. 6, no. 1, 013223, American Physical Society, 2024, doi:10.1103/PhysRevResearch.6.013223.
short: S. Sack, D.J. Egger, Physical Review Research 6 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-03-17T23:00:59Z
date_published: 2024-03-01T00:00:00Z
date_updated: 2026-10-16T12:12:26Z
day: '01'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.1103/PhysRevResearch.6.013223
external_id:
arxiv:
- '2307.14427'
file:
- access_level: open_access
checksum: 274c9f1b15b3547a10a03f39e4ccc582
content_type: application/pdf
creator: dernst
date_created: 2024-03-19T07:16:38Z
date_updated: 2024-03-19T07:16:38Z
file_id: '15123'
file_name: 2024_PhysicalReviewResearch_Sack.pdf
file_size: 2777593
relation: main_file
success: 1
file_date_updated: 2024-03-19T07:16:38Z
fulldoi: https://doi.org/10.1103/PhysRevResearch.6.013223
has_accepted_license: '1'
intvolume: ' 6'
issue: '1'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: bd660c93-d553-11ed-ba76-fb0fb6f49c0d
name: IBM PhD Nomination Fellowship - Stefan Sack
publication: Physical Review Research
publication_identifier:
eissn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Large-scale quantum approximate optimization on nonplanar graphs with machine
learning noise mitigation
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: 6
year: '2024'
...
---
_id: '18110'
abstract:
- lang: eng
text: We study a chaotic particle-conserving kinetically constrained model, with
a single parameter which allows us to break reflection symmetry. Through extensive
numerical simulations we find that the domain wall state shows a variety of dynamical
behaviors from localization all the way to ballistic transport, depending on the
value of the reflection breaking parameter. Surprisingly, such anomalous behavior
is not mirrored in infinite-temperature dynamics, which appear to scale diffusively,
in line with expectations for generic interacting models. However, studying the
particle density gradient, we show that the lack of reflection symmetry affects
infinite-temperature dynamics, resulting in an asymmetric dynamical structure
factor. This is in disagreement with normal diffusion and suggests that the model
may also exhibit anomalous dynamics at infinite temperature in the thermodynamic
limit. Finally, we observe low-entangled eigenstates in the spectrum of the model,
a telltale sign of quantum many-body scars.
acknowledgement: "The authors acknowledge useful discussions with M. Serbyn, Z. Papic,
and A. Nunnenkamp. ´\r\nP.B. is supported by the Erwin Schrödinger Center for Quantum
Science & Technology (ESQ) of the Österreichische Akademie der Wissenschaften (ÖAW)
under the Discovery Grant. M.L. acknowledges support from the European Research
Council (ERC) under the European Union’s Horizon 2020 research and innovation programme
(Grant Agreement\r\nNo. 850899). The numerical simulations were performed using
the ITensor library [68] on the Vienna Scientific Cluster (VSC)."
article_number: L100304
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Pietro
full_name: Brighi, Pietro
id: 4115AF5C-F248-11E8-B48F-1D18A9856A87
last_name: Brighi
orcid: 0000-0002-7969-2729
- first_name: Marko
full_name: Ljubotina, Marko
id: F75EE9BE-5C90-11EA-905D-16643DDC885E
last_name: Ljubotina
orcid: 0000-0003-0038-7068
citation:
ama: Brighi P, Ljubotina M. Anomalous transport in the kinetically constrained quantum
East-West model. Physical Review B. 2024;110(10). doi:10.1103/PhysRevB.110.L100304
apa: Brighi, P., & Ljubotina, M. (2024). Anomalous transport in the kinetically
constrained quantum East-West model. Physical Review B. American Physical
Society. https://doi.org/10.1103/PhysRevB.110.L100304
chicago: Brighi, Pietro, and Marko Ljubotina. “Anomalous Transport in the Kinetically
Constrained Quantum East-West Model.” Physical Review B. American Physical
Society, 2024. https://doi.org/10.1103/PhysRevB.110.L100304.
ieee: P. Brighi and M. Ljubotina, “Anomalous transport in the kinetically constrained
quantum East-West model,” Physical Review B, vol. 110, no. 10. American
Physical Society, 2024.
ista: Brighi P, Ljubotina M. 2024. Anomalous transport in the kinetically constrained
quantum East-West model. Physical Review B. 110(10), L100304.
mla: Brighi, Pietro, and Marko Ljubotina. “Anomalous Transport in the Kinetically
Constrained Quantum East-West Model.” Physical Review B, vol. 110, no.
10, L100304, American Physical Society, 2024, doi:10.1103/PhysRevB.110.L100304.
short: P. Brighi, M. Ljubotina, Physical Review B 110 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-09-22T22:01:42Z
date_published: 2024-09-11T00:00:00Z
date_updated: 2026-10-16T12:12:47Z
day: '11'
department:
- _id: MaSe
doi: 10.1103/PhysRevB.110.L100304
ec_funded: 1
external_id:
arxiv:
- '2405.02102'
isi:
- '001361617100003'
fulldoi: https://doi.org/10.1103/PhysRevB.110.L100304
intvolume: ' 110'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2405.02102
month: '09'
oa: 1
oa_version: Preprint
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 B
publication_identifier:
eissn:
- 2469-9969
issn:
- 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Anomalous transport in the kinetically constrained quantum East-West model
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 110
year: '2024'
...
---
_id: '15002'
abstract:
- lang: eng
text: "The lattice Schwinger model, the discrete version of QED in \r\n1\r\n+\r\n1\r\n
dimensions, is a well-studied test bench for lattice gauge theories. Here, we
study the fractal properties of this model. We reveal the self-similarity of the
ground state, which allows us to develop a recurrent procedure for finding the
ground-state wave functions and predicting ground-state energies. We present the
results of recurrently calculating ground-state wave functions using the fractal
Ansatz and automized software package for fractal image processing. In certain
parameter regimes, just a few terms are enough for our recurrent procedure to
predict ground-state energies close to the exact ones for several hundreds of
sites. Our findings pave the way to understanding the complexity of calculating
many-body wave functions in terms of their fractal properties as well as finding
new links between condensed matter and high-energy lattice models."
acknowledgement: "We thank A. Bargov, I. Khaymovich, and V. Tiunova for fruitful discussions
and for useful comments. M. C. B. thanks S. Kühn for discussions about the phase
structure of the model. A. K. F. thanks V. Gritsev and A. Garkun for insightful
comments. E. V. P., E. S. T., and A. K. F. are\r\nsupported by the RSF Grant No.
20-42-05002 (studying the fractal Ansatz) and the Roadmap on Quantum Computing (Contract
No. 868-1.3-15/15-2021, October 5, 2021; calculating on GS energies). A. K. F. thanks
the Priority 2030 program at the NIST “MISIS” under the project No. K1-2022-027.
M. C. B. was partly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research
Foundation) under Germany’s Excellence Strategy—EXC-2111–390814868."
article_number: '050401'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Elena
full_name: Petrova, Elena
id: 0ac84990-897b-11ed-a09c-f5abb56a4ede
last_name: Petrova
- first_name: Egor S.
full_name: Tiunov, Egor S.
last_name: Tiunov
- first_name: Mari Carmen
full_name: Bañuls, Mari Carmen
last_name: Bañuls
- first_name: Aleksey K.
full_name: Fedorov, Aleksey K.
last_name: Fedorov
citation:
ama: Petrova E, Tiunov ES, Bañuls MC, Fedorov AK. Fractal states of the Schwinger
model. Physical Review Letters. 2024;132(5). doi:10.1103/PhysRevLett.132.050401
apa: Petrova, E., Tiunov, E. S., Bañuls, M. C., & Fedorov, A. K. (2024). Fractal
states of the Schwinger model. Physical Review Letters. American Physical
Society. https://doi.org/10.1103/PhysRevLett.132.050401
chicago: Petrova, Elena, Egor S. Tiunov, Mari Carmen Bañuls, and Aleksey K. Fedorov.
“Fractal States of the Schwinger Model.” Physical Review Letters. American
Physical Society, 2024. https://doi.org/10.1103/PhysRevLett.132.050401.
ieee: E. Petrova, E. S. Tiunov, M. C. Bañuls, and A. K. Fedorov, “Fractal states
of the Schwinger model,” Physical Review Letters, vol. 132, no. 5. American
Physical Society, 2024.
ista: Petrova E, Tiunov ES, Bañuls MC, Fedorov AK. 2024. Fractal states of the Schwinger
model. Physical Review Letters. 132(5), 050401.
mla: Petrova, Elena, et al. “Fractal States of the Schwinger Model.” Physical
Review Letters, vol. 132, no. 5, 050401, American Physical Society, 2024,
doi:10.1103/PhysRevLett.132.050401.
short: E. Petrova, E.S. Tiunov, M.C. Bañuls, A.K. Fedorov, Physical Review Letters
132 (2024).
das_tickbox: '0'
date_created: 2024-02-18T23:01:00Z
date_published: 2024-01-30T00:00:00Z
date_updated: 2026-10-16T12:12:00Z
day: '30'
department:
- _id: MaSe
doi: 10.1103/PhysRevLett.132.050401
external_id:
arxiv:
- '2201.10220'
isi:
- '001179276700003'
pmid:
- '38364163'
fulldoi: https://doi.org/10.1103/PhysRevLett.132.050401
intvolume: ' 132'
isi: 1
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2201.10220
month: '01'
oa: 1
oa_version: Preprint
pmid: 1
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Fractal states of the Schwinger model
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 132
year: '2024'
...
---
OA_place: publisher
_id: '17208'
abstract:
- lang: eng
text: "Can current quantum computers provide a speedup over their classical counterparts
for some kinds of problems? In this thesis, with a focus on ground state search/preparation,
we address some of the challenges that both quantum annealing and variational
quantum algorithms suffer from, hindering any possible practical speedup in comparison
to the best classical counterparts. \r\n\r\nIn the first part of the thesis, we
study the performance of quantum annealing for solving a particular combinatorial
optimization problem called 3-XOR satisfability (3-XORSAT). The classical problem
is mapped into a ground state search of a 3-local classical Hamiltonian $H_C$.
We consider how modifying the initial problem, by adding more interaction terms
to the corresponding Hamiltonian, leads to the emergence of a first-order phase
transition during the annealing process. This phenomenon causes the total annealing
duration, $T$, required to prepare the ground state of $H_C$ with a high probability
to increase exponentially with the size of the problem. Our findings indicate
that with the growing complexity of problem instances, the likelihood of encountering
first-order phase transitions also increases, making quantum annealing an impractical
solution for these types of combinatorial optimization problems.\r\n\r\nIn the
second part, we focus on the problem of barren plateaus in generic variational
quantum algorithms. Barren plateaus correspond to flat regions in the parameter
space where the gradient of the cost function is zero in expectation, and with
the variance decaying exponentially with the system size, thus obstructing an
efficient parameter optimization. We propose an algorithm to circumvent Barren
Plateaus by monitoring the entanglement entropy of k-local reduced density matrices,
alongside a method for estimating entanglement entropy via classical shadow tomography.
We illustrate the approach with the paradigmatic example of the variational quantum
eigensolver, and show that our algorithm effectively avoids barren plateaus in
the initialization as well as during the optimization stage. \r\n\r\nLastly, in
the last two Chapters of this thesis, we focus on the quantum approximate optimization
algorithm (QAOA), originally introduced as an algorithm for solving generic combinatorial
optimization problems in near-term quantum devices. Specifically, we focus on
how to develop rigorous initialization strategies with guarantee improvement.
Our motivation for this study lies in that for random initialization, the optimization
typically leads to local minima with poor performance. Our main result corresponds
to the analytical construction of index-1 saddle points or transition states,
stationary points with a single direction of descent, as a tool for systematically
exploring the QAOA optimization landscape. This leads us to propose a novel greedy
parameter initialization strategy that guarantees for the energy to decrease with
an increasing number of circuit layers. Furthermore, with precise estimates for
the negative Hessian eigenvalue and its eigenvector, we establish a lower bound
for energy improvement following a QAOA iteration."
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- 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
citation:
ama: Medina Ramos RA. Exploring the optimization landscape of variational quantum
algorithms. 2024. doi:10.15479/at:ista:17208
apa: Medina Ramos, R. A. (2024). Exploring the optimization landscape of variational
quantum algorithms. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:17208
chicago: Medina Ramos, Raimel A. “Exploring the Optimization Landscape of Variational
Quantum Algorithms.” Institute of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:17208.
ieee: R. A. Medina Ramos, “Exploring the optimization landscape of variational quantum
algorithms,” Institute of Science and Technology Austria, 2024.
ista: Medina Ramos RA. 2024. Exploring the optimization landscape of variational
quantum algorithms. Institute of Science and Technology Austria.
mla: Medina Ramos, Raimel A. Exploring the Optimization Landscape of Variational
Quantum Algorithms. Institute of Science and Technology Austria, 2024, doi:10.15479/at:ista:17208.
short: R.A. Medina Ramos, Exploring the Optimization Landscape of Variational Quantum
Algorithms, Institute of Science and Technology Austria, 2024.
corr_author: '1'
das_tickbox: '0'
date_created: 2024-07-09T09:14:24Z
date_published: 2024-07-09T00:00:00Z
date_updated: 2026-10-16T12:14:52Z
day: '09'
ddc:
- '539'
degree_awarded: PhD
department:
- _id: GradSch
- _id: MaSe
doi: 10.15479/at:ista:17208
doi_confirm: '1'
ec_funded: 1
file:
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date_created: 2024-07-09T09:21:44Z
date_updated: 2024-07-10T11:34:09Z
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file_size: '14218691'
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creator: rmedinar
date_created: 2024-07-17T09:23:24Z
date_updated: 2024-07-17T09:23:24Z
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file_date_updated: 2024-07-17T09:23:24Z
fulldoi: https://doi.org/10.15479/at:ista:17208
has_accepted_license: '1'
keyword:
- Quantum computing
- Variational Quantum Algorithms
- Optimization
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '133'
project:
- _id: 23841C26-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '850899'
name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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- id: '17222'
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status: public
researchdata_availability: no
status: public
supervisor:
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
supplementarymaterial: no
title: Exploring the optimization landscape of variational quantum algorithms
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: dissertation
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
APC_amount: 4863,6 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '17493'
abstract:
- lang: eng
text: Estimating global properties of many-body quantum systems such as entropy
or bipartite entanglement is a notoriously difficult task, typically requiring
a number of measurements or classical postprocessing resources growing exponentially
in the system size. In this work, we address the problem of estimating global
entropies and mixed-state entanglement via partial-transposed (PT) moments and
show that efficient estimation strategies exist under the assumption that all
the spatial correlation lengths are finite. Focusing on one-dimensional systems,
we identify a set of approximate factorization conditions (AFCs) on the system
density matrix, which allow us to reconstruct entropies and PT moments from information
on local subsystems. This identification yields a simple and efficient strategy
for entropy and entanglement estimation. Our method could be implemented in different
ways, depending on how information on local subsystems is extracted. Focusing
on randomized measurements providing a practical and common measurement scheme,
we prove that our protocol requires only polynomially many measurements and postprocessing
operations, assuming that the state to be measured satisfies the AFCs. We prove
that the AFCs hold for finite-depth quantum-circuit states and translation-invariant
matrix-product density operators and provide numerical evidence that they are
satisfied in more general, physically interesting cases, including thermal states
of local Hamiltonians. We argue that our method could be practically useful to
detect bipartite mixed-state entanglement for large numbers of qubits available
in today’s quantum platforms.
acknowledgement: B. V. acknowledges funding from the Austrian Science Foundation (Grant
No. FWF, P 32597 N), from the French National Research Agency via the JCJC project
QRand (Grant No. ANR-20-CE47-0005), and via the research programs Plan France 2030
EPIQ (Grant No. ANR-22-PETQ-0007), QUBITAF (Grant No. ANR-22-PETQ-0004), and HQI
(Grant No. ANR-22-PNCQ-0002). M. L. and M. S. acknowledge support by the European
Research Council under the European Union’s Horizon 2020 research and innovation
program (Grant Agreement No. 850899). M. S. acknowledges the hospitality of KITP
supported in part by the National Science Foundation under Grants No. NSF PHY-1748958
and No. NSF PHY-2309135. J. I. C. is supported by the Hightech Agenda Bayern Plus
through the Munich Quantum Valley and the German Federal Ministry of Education and
Research through EQUAHUMO (Grant No. 13N16066). P. Z. acknowledges funding from
the European Union’s Horizon 2020 research and innovation program under Grant Agreement
No. 101113690 (PASQuanS2.1).
article_number: '031035'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Benoît
full_name: Vermersch, Benoît
last_name: Vermersch
- first_name: Marko
full_name: Ljubotina, Marko
id: F75EE9BE-5C90-11EA-905D-16643DDC885E
last_name: Ljubotina
orcid: 0000-0003-0038-7068
- first_name: J. Ignacio
full_name: Cirac, J. Ignacio
last_name: Cirac
- first_name: Peter
full_name: Zoller, Peter
last_name: Zoller
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
- first_name: Lorenzo
full_name: Piroli, Lorenzo
last_name: Piroli
citation:
ama: Vermersch B, Ljubotina M, Cirac JI, Zoller P, Serbyn M, Piroli L. Many-body
entropies and entanglement from polynomially many local measurements. Physical
Review X. 2024;14(3). doi:10.1103/physrevx.14.031035
apa: Vermersch, B., Ljubotina, M., Cirac, J. I., Zoller, P., Serbyn, M., & Piroli,
L. (2024). Many-body entropies and entanglement from polynomially many local measurements.
Physical Review X. American Physical Society. https://doi.org/10.1103/physrevx.14.031035
chicago: Vermersch, Benoît, Marko Ljubotina, J. Ignacio Cirac, Peter Zoller, Maksym
Serbyn, and Lorenzo Piroli. “Many-Body Entropies and Entanglement from Polynomially
Many Local Measurements.” Physical Review X. American Physical Society,
2024. https://doi.org/10.1103/physrevx.14.031035.
ieee: B. Vermersch, M. Ljubotina, J. I. Cirac, P. Zoller, M. Serbyn, and L. Piroli,
“Many-body entropies and entanglement from polynomially many local measurements,”
Physical Review X, vol. 14, no. 3. American Physical Society, 2024.
ista: Vermersch B, Ljubotina M, Cirac JI, Zoller P, Serbyn M, Piroli L. 2024. Many-body
entropies and entanglement from polynomially many local measurements. Physical
Review X. 14(3), 031035.
mla: Vermersch, Benoît, et al. “Many-Body Entropies and Entanglement from Polynomially
Many Local Measurements.” Physical Review X, vol. 14, no. 3, 031035, American
Physical Society, 2024, doi:10.1103/physrevx.14.031035.
short: B. Vermersch, M. Ljubotina, J.I. Cirac, P. Zoller, M. Serbyn, L. Piroli,
Physical Review X 14 (2024).
das_tickbox: '0'
date_created: 2024-09-04T18:57:11Z
date_published: 2024-08-26T00:00:00Z
date_updated: 2026-10-16T12:15:28Z
day: '26'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.1103/physrevx.14.031035
ec_funded: 1
external_id:
arxiv:
- '2311.08108'
isi:
- '001299667100002'
file:
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checksum: 1b114acc89025120727200681e4e9074
content_type: application/pdf
creator: cchlebak
date_created: 2024-09-05T09:39:00Z
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file_id: '17532'
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file_size: 1408836
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file_date_updated: 2024-09-05T09:39:00Z
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intvolume: ' 14'
isi: 1
issue: '3'
language:
- iso: eng
month: '08'
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 X
publication_identifier:
issn:
- 2160-3308
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Many-body entropies and entanglement from polynomially many local measurements
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: 14
year: '2024'
...
---
_id: '15367'
abstract:
- lang: eng
text: Two-dimensional semiconductor-superconductor heterostructures form the foundation
of numerous nanoscale physical systems. However, measuring the properties of such
heterostructures, and characterizing the semiconductor in-situ is challenging.
A recent experimental study by [Phys. Rev. Lett. 128, 107701 (2022)] was able
to probe the semiconductor within the heterostructure using microwave measurements
of the superfluid density. This work revealed a rapid depletion of superfluid
density in semiconductor, caused by the in-plane magnetic field which in presence
of spin-orbit coupling creates so-called Bogoliubov Fermi surfaces. The experimental
work used a simplified theoretical model that neglected the presence of non-magnetic
disorder in the semiconductor, hence describing the data only qualitatively. Motivated
by experiments, we introduce a theoretical model describing a disordered semiconductor
with strong spin-orbit coupling that is proximitized by a superconductor. Our
model provides specific predictions for the density of states and superfluid density.
Presence of disorder leads to the emergence of a gapless superconducting phase,
that may be viewed as a manifestation of Bogoliubov Fermi surface. When applied
to real experimental data, our model showcases excellent quantitative agreement,
enabling the extraction of material parameters such as mean free path and mobility,
and estimating g-tensor after taking into account the orbital contribution of
magnetic field. Our model can be used to probe in-situ parameters of other superconductor-semiconductor
heterostructures and can be further extended to give access to transport properties.
acknowledgement: "We acknowledge useful discussions with M. Geier, A. Levchenko, B.
Ramshaw, T. Scaffidi, and\r\nJ. Shabani. This research was funded by the Austrian
Science Fund (FWF) F 86.\r\nFor the purpose of open access, authors have applied
a CC BY public copyright licence to any\r\nAuthor Accepted Manuscript version arising
from this submission. MS acknowledges hospitality of KITP supported in part by the
National Science Foundation under Grants No. NSF\r\nPHY-1748958 and PHY-2309135.
APH acknowledges the support of the NOMIS foundation."
article_number: '115'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Serafim
full_name: Babkin, Serafim
id: 41e64307-6672-11ee-b9ad-cc7a0075a479
last_name: Babkin
orcid: 0009-0003-7382-8036
- first_name: Andrew P
full_name: Higginbotham, Andrew P
id: 4AD6785A-F248-11E8-B48F-1D18A9856A87
last_name: Higginbotham
orcid: 0000-0003-2607-2363
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
citation:
ama: Babkin S, Higginbotham AP, Serbyn M. Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field. SciPost Physics.
2024;16(5). doi:10.21468/scipostphys.16.5.115
apa: Babkin, S., Higginbotham, A. P., & Serbyn, M. (2024). Proximity-induced
gapless superconductivity in two-dimensional Rashba semiconductor in magnetic
field. SciPost Physics. SciPost Foundation. https://doi.org/10.21468/scipostphys.16.5.115
chicago: Babkin, Serafim, Andrew P Higginbotham, and Maksym Serbyn. “Proximity-Induced
Gapless Superconductivity in Two-Dimensional Rashba Semiconductor in Magnetic
Field.” SciPost Physics. SciPost Foundation, 2024. https://doi.org/10.21468/scipostphys.16.5.115.
ieee: S. Babkin, A. P. Higginbotham, and M. Serbyn, “Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field,” SciPost Physics,
vol. 16, no. 5. SciPost Foundation, 2024.
ista: Babkin S, Higginbotham AP, Serbyn M. 2024. Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field. SciPost Physics. 16(5),
115.
mla: Babkin, Serafim, et al. “Proximity-Induced Gapless Superconductivity in Two-Dimensional
Rashba Semiconductor in Magnetic Field.” SciPost Physics, vol. 16, no.
5, 115, SciPost Foundation, 2024, doi:10.21468/scipostphys.16.5.115.
short: S. Babkin, A.P. Higginbotham, M. Serbyn, SciPost Physics 16 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-05-06T09:02:18Z
date_published: 2024-05-01T00:00:00Z
date_updated: 2026-10-16T12:15:53Z
day: '01'
ddc:
- '530'
department:
- _id: MaSe
- _id: AnHi
doi: 10.21468/scipostphys.16.5.115
external_id:
arxiv:
- '2311.09347'
isi:
- '001215855200002'
file:
- access_level: open_access
checksum: f999204856417dcf5a736ac8df432b96
content_type: application/pdf
creator: dernst
date_created: 2024-05-07T12:58:47Z
date_updated: 2024-05-07T12:58:47Z
file_id: '15369'
file_name: 2024_SciPostPhys_Babkin.pdf
file_size: 2733685
relation: main_file
success: 1
file_date_updated: 2024-05-07T12:58:47Z
fulldoi: https://doi.org/10.21468/scipostphys.16.5.115
has_accepted_license: '1'
intvolume: ' 16'
isi: 1
issue: '5'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
project:
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
- _id: 34a7f947-11ca-11ed-8bc3-c5dc2bbaae25
grant_number: F8609
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems: Probing
topology in circuits and quantum materials'
publication: SciPost Physics
publication_identifier:
issn:
- 2542-4653
publication_status: published
publisher: SciPost Foundation
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor
in magnetic field
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: 16
year: '2024'
...
---
OA_place: repository
OA_type: green
_id: '18627'
abstract:
- lang: eng
text: In contrast with extended Bloch waves, a single particle can become spatially
localized due to the so-called skin effect originating from non-Hermitian pumping.
Here we show that in kinetically constrained many-body systems, the skin effect
can instead manifest as dynamical amplification within the Fock space, beyond
the intuitively expected and previously studied particle localization and clustering.
We exemplify this non-Hermitian Fock skin effect in an asymmetric version of the
PXP model and show that it gives rise to ergodicity-breaking eigenstates—the non-Hermitian
analogs of quantum many-body scars. A distinguishing feature of these non-Hermitian
scars is their enhanced robustness against external disorders. We propose an experimental
realization of the non-Hermitian scar enhancement in a tilted Bose-Hubbard optical
lattice with laser-induced loss. Additionally, we implement digital simulations
of such scar enhancement on the IBM quantum processor. Our results show that the
Fock skin effect provides a powerful tool for creating robust nonergodic states
in generic open quantum systems.
acknowledgement: F. Q. and C. H. L. acknowledge support from the QEP2.0 Grant from
the Singapore National Research Foundation (Grant No. NRF2021-QEP2-02-P09) and the
Singapore MOE Tier-II Grant (Grant No. MOE-T2EP50222-0003). J.-Y. D. and Z. P. acknowledge
support by the Leverhulme Trust Research Leadership Award RL-2019-015. This project
has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Skłodowska-Curie Grant Agreement No. 101034413. This research
was supported in part by Grant No. NSF PHY-2309135 to the Kavli Institute for Theoretical
Physics (KITP). We acknowledge the use of IBM Quantum services for this work. The
views expressed are those of the authors and do not reflect the official policy
or position of IBM or the IBM Quantum team.
article_number: '216601'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ruizhe
full_name: Shen, Ruizhe
last_name: Shen
- first_name: Fang
full_name: Qin, Fang
last_name: Qin
- first_name: Jean-Yves Marc
full_name: Desaules, Jean-Yves Marc
id: 6c292945-a610-11ed-9eec-c3be1ad62a80
last_name: Desaules
orcid: 0000-0002-3749-6375
- first_name: Zlatko
full_name: Papić, Zlatko
last_name: Papić
- first_name: Ching Hua
full_name: Lee, Ching Hua
last_name: Lee
citation:
ama: Shen R, Qin F, Desaules J-YM, Papić Z, Lee CH. Enhanced many-body quantum scars
from the non-hermitian fock skin effect. Physical Review Letters. 2024;133(21).
doi:10.1103/PhysRevLett.133.216601
apa: Shen, R., Qin, F., Desaules, J.-Y. M., Papić, Z., & Lee, C. H. (2024).
Enhanced many-body quantum scars from the non-hermitian fock skin effect. Physical
Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.133.216601
chicago: Shen, Ruizhe, Fang Qin, Jean-Yves Marc Desaules, Zlatko Papić, and Ching
Hua Lee. “Enhanced Many-Body Quantum Scars from the Non-Hermitian Fock Skin Effect.”
Physical Review Letters. American Physical Society, 2024. https://doi.org/10.1103/PhysRevLett.133.216601.
ieee: R. Shen, F. Qin, J.-Y. M. Desaules, Z. Papić, and C. H. Lee, “Enhanced many-body
quantum scars from the non-hermitian fock skin effect,” Physical Review Letters,
vol. 133, no. 21. American Physical Society, 2024.
ista: Shen R, Qin F, Desaules J-YM, Papić Z, Lee CH. 2024. Enhanced many-body quantum
scars from the non-hermitian fock skin effect. Physical Review Letters. 133(21),
216601.
mla: Shen, Ruizhe, et al. “Enhanced Many-Body Quantum Scars from the Non-Hermitian
Fock Skin Effect.” Physical Review Letters, vol. 133, no. 21, 216601, American
Physical Society, 2024, doi:10.1103/PhysRevLett.133.216601.
short: R. Shen, F. Qin, J.-Y.M. Desaules, Z. Papić, C.H. Lee, Physical Review Letters
133 (2024).
das_tickbox: '1'
dataavailabilitystatement: The data supporting the plots within this paper are available
at 10.15479/AT:ISTA:17471
date_created: 2024-12-08T23:01:55Z
date_published: 2024-11-22T00:00:00Z
date_updated: 2026-10-16T12:14:03Z
day: '22'
department:
- _id: MaSe
doi: 10.1103/PhysRevLett.133.216601
ec_funded: 1
external_id:
arxiv:
- '2403.02395'
isi:
- '001369697800005'
pmid:
- '39642519'
fulldoi: https://doi.org/10.1103/PhysRevLett.133.216601
intvolume: ' 133'
isi: 1
issue: '21'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2403.02395
month: '11'
oa: 1
oa_version: Preprint
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '17471'
relation: research_data
status: public
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Enhanced many-body quantum scars from the non-hermitian fock skin effect
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 133
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '18923'
abstract:
- lang: eng
text: 'Combinatorial optimization is a challenging problem applicable in a wide
range of fields from logistics to finance. Recently, quantum computing has been
used to attempt to solve these problems using a range of algorithms, including
parameterized quantum circuits, adiabatic protocols, and quantum annealing. These
solutions typically have several challenges: 1) there is little to no performance
gain over classical methods; 2) not all constraints and objectives may be efficiently
encoded in the quantum ansatz; and 3) the solution domain of the objective function
may not be the same as the bit strings of measurement outcomes. This work presents
“nonnative hybrid algorithms”: a framework to overcome these challenges by integrating
quantum and classical resources with a hybrid approach. By designing nonnative
quantum variational anosatzes that inherit some but not all problem structure,
measurement outcomes from the quantum computer can act as a resource to be used
by classical routines to indirectly compute optimal solutions, partially overcoming
the challenges of contemporary quantum optimization approaches. These methods
are demonstrated using a publicly available neutral-atom quantum computer on two
simple problems of Max k-Cut and maximum independent set. We find improvements
in solution quality when comparing the hybrid algorithm to its “no quantum” version,
a demonstration of a “comparative advantage.”'
acknowledgement: "The authors would like to thank Alexander Keesling, Maddie Cain,
Nate Gemelke, and Phillip Weinberg for helpful discussions and Danylo Lykov who
had early contributions to this work.\r\n10.13039/100000185-Defense Advanced Research
Projects Agency Noisy Intermediate-Scale Quantum Devices (Grant Number: W911NF2010021),
DARPA Small Business Technology Transfer program (Grant Number: 140D0422C0035)."
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Jonathan
full_name: Wurtz, Jonathan
last_name: Wurtz
- first_name: Stefan
full_name: Sack, Stefan
id: dd622248-f6e0-11ea-865d-ce382a1c81a5
last_name: Sack
orcid: 0000-0001-5400-8508
- first_name: Sheng-Tao
full_name: Wang, Sheng-Tao
last_name: Wang
citation:
ama: Wurtz J, Sack S, Wang S-T. Solving nonnative combinatorial optimization problems
using hybrid quantum–classical algorithms. IEEE Transactions on Quantum Engineering.
2024;5:1-14. doi:10.1109/tqe.2024.3443660
apa: Wurtz, J., Sack, S., & Wang, S.-T. (2024). Solving nonnative combinatorial
optimization problems using hybrid quantum–classical algorithms. IEEE Transactions
on Quantum Engineering. IEEE. https://doi.org/10.1109/tqe.2024.3443660
chicago: Wurtz, Jonathan, Stefan Sack, and Sheng-Tao Wang. “Solving Nonnative Combinatorial
Optimization Problems Using Hybrid Quantum–Classical Algorithms.” IEEE Transactions
on Quantum Engineering. IEEE, 2024. https://doi.org/10.1109/tqe.2024.3443660.
ieee: J. Wurtz, S. Sack, and S.-T. Wang, “Solving nonnative combinatorial optimization
problems using hybrid quantum–classical algorithms,” IEEE Transactions on Quantum
Engineering, vol. 5. IEEE, pp. 1–14, 2024.
ista: Wurtz J, Sack S, Wang S-T. 2024. Solving nonnative combinatorial optimization
problems using hybrid quantum–classical algorithms. IEEE Transactions on Quantum
Engineering. 5, 1–14.
mla: Wurtz, Jonathan, et al. “Solving Nonnative Combinatorial Optimization Problems
Using Hybrid Quantum–Classical Algorithms.” IEEE Transactions on Quantum Engineering,
vol. 5, IEEE, 2024, pp. 1–14, doi:10.1109/tqe.2024.3443660.
short: J. Wurtz, S. Sack, S.-T. Wang, IEEE Transactions on Quantum Engineering 5
(2024) 1–14.
das_tickbox: '0'
date_created: 2025-01-27T15:00:44Z
date_published: 2024-08-14T00:00:00Z
date_updated: 2026-10-16T12:15:09Z
day: '14'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.1109/tqe.2024.3443660
file:
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checksum: 19b84e35cba05bde72bfe7e0b54c3e6c
content_type: application/pdf
creator: dernst
date_created: 2025-01-27T15:03:09Z
date_updated: 2025-01-27T15:03:09Z
file_id: '18924'
file_name: 2024_IEEEQuantumComputing_Wurtz.pdf
file_size: 1753095
relation: main_file
success: 1
file_date_updated: 2025-01-27T15:03:09Z
fulldoi: https://doi.org/10.1109/tqe.2024.3443660
has_accepted_license: '1'
intvolume: ' 5'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
page: 1-14
publication: IEEE Transactions on Quantum Engineering
publication_identifier:
issn:
- 2689-1808
publication_status: published
publisher: IEEE
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Solving nonnative combinatorial optimization problems using hybrid quantum–classical
algorithms
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: 5
year: '2024'
...
---
OA_place: repository
OA_type: green
_id: '14845'
abstract:
- lang: eng
text: We study a linear rotor in a bosonic bath within the angulon formalism. Our
focus is on systems where isotropic or anisotropic impurity-boson interactions
support a shallow bound state. To study the fate of the angulon in the vicinity
of bound-state formation, we formulate a beyond-linear-coupling angulon Hamiltonian.
First, we use it to study attractive, spherically symmetric impurity-boson interactions
for which the linear rotor can be mapped onto a static impurity. The well-known
polaron formalism provides an adequate description in this limit. Second, we consider
anisotropic potentials, and show that the presence of a shallow bound state with
pronounced anisotropic character leads to a many-body instability that washes
out the angulon dynamics.
acknowledgement: "We would like to thank G. Bighin, I. Cherepanov, E. Paerschke, and
E. Yakaboylu for insightful discussions on a wide range of topics. This work has
been supported by the European Research Council (ERC) Starting Grant No. 801770
(ANGULON). A.G. and A.G.V. acknowledge support from the European Union’s Horizon
2020 research and innovation\r\nprogram under the Marie Skłodowska-Curie Grant Agreement
No. 754411. Numerical calculations were performed on the Euler cluster managed by
the HPC team at ETH Zurich.\r\nR.S. acknowledges support by the Deutsche Forschungsgemeinschaft
under Germany’s Excellence Strategy Grant No. EXC 2181/1-390900948 (the Heidelberg
STRUCTURES Excellence Cluster). T.D. acknowledges support from the Isaac Newton
Studentship and the Science and Technology Facilities Council under Grant No. ST/V50659X/1."
article_number: '014102'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Tibor
full_name: Dome, Tibor
id: 7e3293e2-b9dc-11ee-97a9-cd73400f6994
last_name: Dome
orcid: 0000-0003-2586-3702
- first_name: Artem
full_name: Volosniev, Artem
id: 37D278BC-F248-11E8-B48F-1D18A9856A87
last_name: Volosniev
orcid: 0000-0003-0393-5525
- first_name: Areg
full_name: Ghazaryan, Areg
id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
last_name: Ghazaryan
orcid: 0000-0001-9666-3543
- first_name: Laleh
full_name: Safari, Laleh
id: 3C325E5E-F248-11E8-B48F-1D18A9856A87
last_name: Safari
- first_name: Richard
full_name: Schmidt, Richard
last_name: Schmidt
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. Linear rotor
in an ideal Bose gas near the threshold for binding. Physical Review B.
2024;109(1). doi:10.1103/PhysRevB.109.014102
apa: Dome, T., Volosniev, A., Ghazaryan, A., Safari, L., Schmidt, R., & Lemeshko,
M. (2024). Linear rotor in an ideal Bose gas near the threshold for binding. Physical
Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.109.014102
chicago: Dome, Tibor, Artem Volosniev, Areg Ghazaryan, Laleh Safari, Richard Schmidt,
and Mikhail Lemeshko. “Linear Rotor in an Ideal Bose Gas near the Threshold for
Binding.” Physical Review B. American Physical Society, 2024. https://doi.org/10.1103/PhysRevB.109.014102.
ieee: T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, and M. Lemeshko,
“Linear rotor in an ideal Bose gas near the threshold for binding,” Physical
Review B, vol. 109, no. 1. American Physical Society, 2024.
ista: Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. 2024. Linear
rotor in an ideal Bose gas near the threshold for binding. Physical Review B.
109(1), 014102.
mla: Dome, Tibor, et al. “Linear Rotor in an Ideal Bose Gas near the Threshold for
Binding.” Physical Review B, vol. 109, no. 1, 014102, American Physical
Society, 2024, doi:10.1103/PhysRevB.109.014102.
short: T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, M. Lemeshko,
Physical Review B 109 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-01-21T23:00:57Z
date_published: 2024-01-01T00:00:00Z
date_updated: 2026-10-16T12:16:12Z
day: '01'
department:
- _id: MiLe
doi: 10.1103/PhysRevB.109.014102
ec_funded: 1
external_id:
arxiv:
- '2308.03852'
isi:
- '001172754500002'
fulldoi: https://doi.org/10.1103/PhysRevB.109.014102
intvolume: ' 109'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2308.03852
month: '01'
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'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review B
publication_identifier:
eissn:
- 2469-9969
issn:
- 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Linear rotor in an ideal Bose gas near the threshold for binding
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 109
year: '2024'
...
---
_id: '17471'
abstract:
- lang: eng
text: Mechanisms for suppressing thermalization in disorder-free many-body systems,
such as Hilbert space fragmentation and quantum many-body scars, have recently
attracted much interest in foundations of quantum statistical physics and potential
quantum information processing applications. However, their sensitivity to realistic
effects such as finite temperature remains largely unexplored. Here, we have utilized
IBM's Kolkata quantum processor to demonstrate an unexpected robustness of quantum
many-body scars at finite temperatures when the system is prepared in a thermal
Gibbs ensemble. We identify such robustness in the PXP model, which describes
quantum many-body scars in experimental systems of Rydberg atom arrays and ultracold
atoms in tilted Bose--Hubbard optical lattices. By contrast, other theoretical
models which host exact quantum many-body scars are found to lack such robustness,
and their scarring properties quickly decay with temperature. Our study sheds
light on the important differences between scarred models in terms of their algebraic
structures, which impacts their resilience to finite temperature.
article_processing_charge: No
author:
- first_name: Jean-Yves Marc
full_name: Desaules, Jean-Yves Marc
id: 6c292945-a610-11ed-9eec-c3be1ad62a80
last_name: Desaules
orcid: 0000-0002-3749-6375
citation:
ama: Desaules J-YM. Data for “Enhanced many-body quantum scars from the non-Hermitian
Fock skin effect.” 2024. doi:10.15479/AT:ISTA:17471
apa: Desaules, J.-Y. M. (2024). Data for “Enhanced many-body quantum scars from
the non-Hermitian Fock skin effect.” Institute of Science and Technology Austria.
https://doi.org/10.15479/AT:ISTA:17471
chicago: Desaules, Jean-Yves Marc. “Data for ‘Enhanced Many-Body Quantum Scars from
the Non-Hermitian Fock Skin Effect.’” Institute of Science and Technology Austria,
2024. https://doi.org/10.15479/AT:ISTA:17471.
ieee: J.-Y. M. Desaules, “Data for ‘Enhanced many-body quantum scars from the non-Hermitian
Fock skin effect.’” Institute of Science and Technology Austria, 2024.
ista: Desaules J-YM. 2024. Data for ‘Enhanced many-body quantum scars from the non-Hermitian
Fock skin effect’, Institute of Science and Technology Austria, 10.15479/AT:ISTA:17471.
mla: Desaules, Jean-Yves Marc. Data for “Enhanced Many-Body Quantum Scars from
the Non-Hermitian Fock Skin Effect.” Institute of Science and Technology Austria,
2024, doi:10.15479/AT:ISTA:17471.
short: J.-Y.M. Desaules, (2024).
contributor:
- contributor_type: researcher
first_name: Ruizhe
last_name: Shen
- contributor_type: researcher
first_name: Fang
last_name: Qin
- contributor_type: researcher
first_name: Jean-Yves Marc
id: 6c292945-a610-11ed-9eec-c3be1ad62a80
last_name: Desaules
orcid: 0000-0002-3749-6375
- contributor_type: researcher
first_name: Zlatko
last_name: Papić
- contributor_type: researcher
first_name: Ching Hua
last_name: Lee
date_created: 2024-08-30T12:59:43Z
date_published: 2024-08-30T00:00:00Z
date_updated: 2026-10-16T12:14:03Z
day: '30'
ddc:
- '530'
department:
- _id: MaSe
doi: 10.15479/AT:ISTA:17471
ec_funded: 1
file:
- access_level: open_access
checksum: 2bd49ce5a63f1951c1ed3d89cce4fe27
content_type: application/zip
creator: jdesaule
date_created: 2024-08-30T12:55:37Z
date_updated: 2024-08-30T12:55:37Z
file_id: '17472'
file_name: FiguresData.zip
file_size: 322400
relation: main_file
success: 1
- access_level: open_access
checksum: c2ba113a241e98c394cc3ca21f3fa126
content_type: text/plain
creator: jdesaule
date_created: 2024-08-30T13:19:57Z
date_updated: 2024-08-30T13:19:57Z
file_id: '17473'
file_name: readme.txt
file_size: 1368
relation: main_file
success: 1
file_date_updated: 2024-08-30T13:19:57Z
fulldoi: https://doi.org/10.15479/AT:ISTA:17471
has_accepted_license: '1'
keyword:
- quantum many-body scars
- non-equilibrium physics
- non-Hermitian physics
license: https://creativecommons.org/licenses/by-nc/4.0/
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '18627'
relation: used_in_publication
status: public
status: public
title: Data for "Enhanced many-body quantum scars from the non-Hermitian Fock skin
effect"
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: research_data
user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d
year: '2024'
...
---
OA_place: repository
_id: '17222'
abstract:
- lang: eng
text: "The quantum approximate optimization algorithm (QAOA) uses a quantum computer\r\nto
implement a variational method with $2p$ layers of alternating unitary\r\noperators,
optimized by a classical computer to minimize a cost function. While\r\nrigorous
performance guarantees exist for the QAOA at small depths $p$, the\r\nbehavior
at large depths remains less clear, though simulations suggest\r\nexponentially
fast convergence for certain problems. In this work, we gain\r\ninsights into
the deep QAOA using an analytic expansion of the cost function\r\naround transition
states. Transition states are constructed in a recursive\r\nmanner: from the local
minima of the QAOA with $p$ layers we obtain transition\r\nstates of the QAOA
with $p+1$ layers, which are stationary points characterized\r\nby a unique direction
of negative curvature. We construct an analytic estimate\r\nof the negative curvature
and the corresponding direction in parameter space at\r\neach transition state.
The expansion of the QAOA cost function along the\r\nnegative direction to the
quartic order gives a lower bound of the QAOA cost\r\nfunction improvement. We
provide physical intuition behind the analytic\r\nexpressions for the local curvature
and quartic expansion coefficient. Our\r\nnumerical study confirms the accuracy
of our approximations and reveals that\r\nthe obtained bound and the true value
of the QAOA cost function gain have a\r\ncharacteristic exponential decrease with
the number of layers $p$, with the\r\nbound decreasing more rapidly. Our study
establishes an analytical method for\r\nrecursively studying the QAOA that is
applicable in the regime of high circuit\r\ndepth."
article_number: '2405.10125'
article_processing_charge: No
arxiv: 1
author:
- 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: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
citation:
ama: Medina Ramos RA, Serbyn M. A recursive lower bound on the energy improvement
of the quantum approximate optimization algorithm. arXiv. doi:10.48550/arXiv.2405.10125
apa: Medina Ramos, R. A., & Serbyn, M. (n.d.). A recursive lower bound on the
energy improvement of the quantum approximate optimization algorithm. arXiv.
https://doi.org/10.48550/arXiv.2405.10125
chicago: Medina Ramos, Raimel A, and Maksym Serbyn. “A Recursive Lower Bound on
the Energy Improvement of the Quantum Approximate Optimization Algorithm.” ArXiv,
n.d. https://doi.org/10.48550/arXiv.2405.10125.
ieee: R. A. Medina Ramos and M. Serbyn, “A recursive lower bound on the energy improvement
of the quantum approximate optimization algorithm,” arXiv. .
ista: Medina Ramos RA, Serbyn M. A recursive lower bound on the energy improvement
of the quantum approximate optimization algorithm. arXiv, 2405.10125.
mla: Medina Ramos, Raimel A., and Maksym Serbyn. “A Recursive Lower Bound on the
Energy Improvement of the Quantum Approximate Optimization Algorithm.” ArXiv,
2405.10125, doi:10.48550/arXiv.2405.10125.
short: R.A. Medina Ramos, M. Serbyn, ArXiv (n.d.).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-07-10T13:12:09Z
date_published: 2024-05-16T00:00:00Z
date_updated: 2026-10-16T12:14:52Z
day: '16'
department:
- _id: MaSe
doi: 10.48550/arXiv.2405.10125
external_id:
arxiv:
- '2405.10125'
fulldoi: https://doi.org/10.48550/arXiv.2405.10125
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2405.10125
month: '05'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: draft
related_material:
record:
- id: '17208'
relation: dissertation_contains
status: public
researchdata_availability: no
status: public
supplementarymaterial: yes
title: A recursive lower bound on the energy improvement of the quantum approximate
optimization algorithm
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: preprint
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_type: closed access
_id: '18616'
abstract:
- lang: eng
text: By patterning an ultrathin layered structure with tiny wells, physicists have
created and imaged peculiar states known as quantum scars — revealing behaviour
that could be used to boost the performance of electronic devices.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Dmitry
full_name: Abanin, Dmitry
last_name: Abanin
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
citation:
ama: Abanin D, Serbyn M. Quantum scars make their mark in graphene. Nature.
2024;635(8040):825-826. doi:10.1038/d41586-024-03649-y
apa: Abanin, D., & Serbyn, M. (2024). Quantum scars make their mark in graphene.
Nature. Springer Nature. https://doi.org/10.1038/d41586-024-03649-y
chicago: Abanin, Dmitry, and Maksym Serbyn. “Quantum Scars Make Their Mark in Graphene.”
Nature. Springer Nature, 2024. https://doi.org/10.1038/d41586-024-03649-y.
ieee: D. Abanin and M. Serbyn, “Quantum scars make their mark in graphene,” Nature,
vol. 635, no. 8040. Springer Nature, pp. 825–826, 2024.
ista: Abanin D, Serbyn M. 2024. Quantum scars make their mark in graphene. Nature.
635(8040), 825–826.
mla: Abanin, Dmitry, and Maksym Serbyn. “Quantum Scars Make Their Mark in Graphene.”
Nature, vol. 635, no. 8040, Springer Nature, 2024, pp. 825–26, doi:10.1038/d41586-024-03649-y.
short: D. Abanin, M. Serbyn, Nature 635 (2024) 825–826.
das_tickbox: '0'
date_created: 2024-12-03T18:08:16Z
date_published: 2024-11-27T00:00:00Z
date_updated: 2026-10-16T12:14:31Z
day: '27'
department:
- _id: MaSe
doi: 10.1038/d41586-024-03649-y
external_id:
isi:
- '001367935000029'
pmid:
- '39604614'
fulldoi: https://doi.org/10.1038/d41586-024-03649-y
intvolume: ' 635'
isi: 1
issue: '8040'
language:
- iso: eng
month: '11'
oa_version: None
page: 825-826
pmid: 1
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Quantum scars make their mark in graphene
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 635
year: '2024'
...
---
DOAJ_listed: '1'
_id: '15053'
abstract:
- lang: eng
text: Atom-based quantum simulators have had many successes in tackling challenging
quantum many-body problems, owing to the precise and dynamical control that they
provide over the systems' parameters. They are, however, often optimized to address
a specific type of problem. Here, we present the design and implementation of
a 6Li-based quantum gas platform that provides wide-ranging capabilities and is
able to address a variety of quantum many-body problems. Our two-chamber architecture
relies on a robust combination of gray molasses and optical transport from a laser-cooling
chamber to a glass cell with excellent optical access. There, we first create
unitary Fermi superfluids in a three-dimensional axially symmetric harmonic trap
and characterize them using in situ thermometry, reaching temperatures below 20
nK. This allows us to enter the deep superfluid regime with samples of extreme
diluteness, where the interparticle spacing is sufficiently large for direct single-atom
imaging. Second, we generate optical lattice potentials with triangular and honeycomb
geometry in which we study diffraction of molecular Bose-Einstein condensates,
and show how going beyond the Kapitza-Dirac regime allows us to unambiguously
distinguish between the two geometries. With the ability to probe quantum many-body
physics in both discrete and continuous space, and its suitability for bulk and
single-atom imaging, our setup represents an important step towards achieving
a wide-scope quantum simulator.
acknowledgement: We thank Clara Bachorz, Darby Bates, Markus Bohlen, Valentin Crépel,
Yann Kiefer, Joanna Lis, Mihail Rabinovic, and Julian Struck for experimental assistance
in the early stages of this project, and Sebastian Will for a critical reading of
the manuscript. This work has been supported by Agence Nationale de la Recherche
(Grant No. ANR-21-CE30-0021), the European Research Council (Grant No. ERC-2016-ADG-743159),
CNRS (Tremplin@INP 2020), and Région Ile-de-France in the framework of DIM SIRTEQ
(Super2D and SISCo) and DIM QuanTiP.
article_number: '013158'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Shuwei
full_name: Jin, Shuwei
last_name: Jin
- first_name: Kunlun
full_name: Dai, Kunlun
last_name: Dai
- first_name: Joris
full_name: Verstraten, Joris
last_name: Verstraten
- first_name: Maxime
full_name: Dixmerias, Maxime
last_name: Dixmerias
- first_name: Ragheed
full_name: Al Hyder, Ragheed
id: d1c405be-ae15-11ed-8510-ccf53278162e
last_name: Al Hyder
- first_name: Christophe
full_name: Salomon, Christophe
last_name: Salomon
- first_name: Bruno
full_name: Peaudecerf, Bruno
last_name: Peaudecerf
- first_name: Tim
full_name: de Jongh, Tim
last_name: de Jongh
- first_name: Tarik
full_name: Yefsah, Tarik
last_name: Yefsah
citation:
ama: Jin S, Dai K, Verstraten J, et al. Multipurpose platform for analog quantum
simulation. Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.013158
apa: Jin, S., Dai, K., Verstraten, J., Dixmerias, M., Al Hyder, R., Salomon, C.,
… Yefsah, T. (2024). Multipurpose platform for analog quantum simulation. Physical
Review Research. American Physical Society. https://doi.org/10.1103/physrevresearch.6.013158
chicago: Jin, Shuwei, Kunlun Dai, Joris Verstraten, Maxime Dixmerias, Ragheed Al
Hyder, Christophe Salomon, Bruno Peaudecerf, Tim de Jongh, and Tarik Yefsah. “Multipurpose
Platform for Analog Quantum Simulation.” Physical Review Research. American
Physical Society, 2024. https://doi.org/10.1103/physrevresearch.6.013158.
ieee: S. Jin et al., “Multipurpose platform for analog quantum simulation,”
Physical Review Research, vol. 6, no. 1. American Physical Society, 2024.
ista: Jin S, Dai K, Verstraten J, Dixmerias M, Al Hyder R, Salomon C, Peaudecerf
B, de Jongh T, Yefsah T. 2024. Multipurpose platform for analog quantum simulation.
Physical Review Research. 6(1), 013158.
mla: Jin, Shuwei, et al. “Multipurpose Platform for Analog Quantum Simulation.”
Physical Review Research, vol. 6, no. 1, 013158, American Physical Society,
2024, doi:10.1103/physrevresearch.6.013158.
short: S. Jin, K. Dai, J. Verstraten, M. Dixmerias, R. Al Hyder, C. Salomon, B.
Peaudecerf, T. de Jongh, T. Yefsah, Physical Review Research 6 (2024).
das_tickbox: '0'
date_created: 2024-03-04T07:42:52Z
date_published: 2024-02-13T00:00:00Z
date_updated: 2026-10-16T12:17:44Z
day: '13'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/physrevresearch.6.013158
external_id:
arxiv:
- '2304.08433'
file:
- access_level: open_access
checksum: ba2ae3e3a011f8897d3803c9366a67e2
content_type: application/pdf
creator: dernst
date_created: 2024-03-04T07:53:08Z
date_updated: 2024-03-04T07:53:08Z
file_id: '15054'
file_name: 2024_PhysicalReviewResearch_Jin.pdf
file_size: 4025988
relation: main_file
success: 1
file_date_updated: 2024-03-04T07:53:08Z
fulldoi: https://doi.org/10.1103/physrevresearch.6.013158
has_accepted_license: '1'
intvolume: ' 6'
issue: '1'
keyword:
- General Physics and Astronomy
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
publication: Physical Review Research
publication_identifier:
eissn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Multipurpose platform for analog quantum simulation
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: 6
year: '2024'
...
---
DOAJ_listed: '1'
_id: '15181'
abstract:
- lang: eng
text: We demonstrate the failure of the adiabatic Born-Oppenheimer approximation
to describe the ground state of a quantum impurity within an ultracold Fermi gas
despite substantial mass differences between the bath and impurity species. Increasing
repulsion leads to the appearance of nonadiabatic couplings between the fast bath
and slow impurity degrees of freedom, which reduce the parity symmetry of the
latter according to the pseudo Jahn-Teller effect. The presence of this mechanism
is associated to a conical intersection involving the impurity position and the
inverse of the interaction strength, which acts as a synthetic dimension. We elucidate
the presence of these effects via a detailed ground-state analysis involving the
comparison of ab initio fully correlated simulations with effective models. Our
study suggests ultracold atomic ensembles as potent emulators of complex molecular
phenomena.
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.\r\nG.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."
article_number: '013257'
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. Synthetic dimension-induced pseudo Jahn-Teller
effect in one-dimensional confined fermions. Physical Review Research.
2024;6(1). doi:10.1103/physrevresearch.6.013257
apa: Becker, A., Koutentakis, G., & Schmelcher, P. (2024). Synthetic dimension-induced
pseudo Jahn-Teller effect in one-dimensional confined fermions. Physical Review
Research. American Physical Society. https://doi.org/10.1103/physrevresearch.6.013257
chicago: Becker, A., Georgios Koutentakis, and P. Schmelcher. “Synthetic Dimension-Induced
Pseudo Jahn-Teller Effect in One-Dimensional Confined Fermions.” Physical Review
Research. American Physical Society, 2024. https://doi.org/10.1103/physrevresearch.6.013257.
ieee: A. Becker, G. Koutentakis, and P. Schmelcher, “Synthetic dimension-induced
pseudo Jahn-Teller effect in one-dimensional confined fermions,” Physical Review
Research, vol. 6, no. 1. American Physical Society, 2024.
ista: Becker A, Koutentakis G, Schmelcher P. 2024. Synthetic dimension-induced pseudo
Jahn-Teller effect in one-dimensional confined fermions. Physical Review Research.
6(1), 013257.
mla: Becker, A., et al. “Synthetic Dimension-Induced Pseudo Jahn-Teller Effect in
One-Dimensional Confined Fermions.” Physical Review Research, vol. 6, no.
1, 013257, American Physical Society, 2024, doi:10.1103/physrevresearch.6.013257.
short: A. Becker, G. Koutentakis, P. Schmelcher, Physical Review Research 6 (2024).
das_tickbox: '0'
date_created: 2024-03-25T08:57:07Z
date_published: 2024-03-01T00:00:00Z
date_updated: 2026-10-16T12:18:24Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/physrevresearch.6.013257
ec_funded: 1
external_id:
arxiv:
- '2310.17995'
file:
- access_level: open_access
checksum: 4e0e58d1f58386fb016284c84db2a300
content_type: application/pdf
creator: dernst
date_created: 2024-03-25T09:24:55Z
date_updated: 2024-03-25T09:24:55Z
file_id: '15183'
file_name: 2024_PhysicalReviewResearch_Becker.pdf
file_size: 2207067
relation: main_file
success: 1
file_date_updated: 2024-03-25T09:24:55Z
fulldoi: https://doi.org/10.1103/physrevresearch.6.013257
has_accepted_license: '1'
intvolume: ' 6'
issue: '1'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
publication: Physical Review Research
publication_identifier:
eissn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Synthetic dimension-induced pseudo Jahn-Teller effect in one-dimensional confined
fermions
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: 6
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'
das_tickbox: '0'
date_created: 2024-02-18T23:01:01Z
date_published: 2024-02-01T00:00:00Z
date_updated: 2026-10-16T12:16:52Z
day: '01'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.109.023101
ec_funded: 1
external_id:
arxiv:
- '2307.07256'
isi:
- '001158043800006'
fulldoi: https://doi.org/10.1103/PhysRevA.109.023101
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
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
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: '15045'
abstract:
- lang: eng
text: Coupling of orbital motion to a spin degree of freedom gives rise to various
transport phenomena in quantum systems that are beyond the standard paradigms
of classical physics. Here, we discuss features of spin-orbit dynamics that can
be visualized using a classical model with two coupled angular degrees of freedom.
Specifically, we demonstrate classical ‘spin’ filtering through our model and
show that the interplay between angular degrees of freedom and dissipation can
lead to asymmetric ‘spin’ transport.
acknowledgement: "We thank Mikhail Lemeshko and members of his group for many inspiring
discussions; Alberto Cappellaro for comments on the manuscript.\r\nOpen access funding
provided by Institute of Science and Technology (IST Austria)."
article_number: '12'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Atul
full_name: Varshney, Atul
id: 2A2006B2-F248-11E8-B48F-1D18A9856A87
last_name: Varshney
orcid: 0000-0002-3072-5999
- first_name: Areg
full_name: Ghazaryan, Areg
id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
last_name: Ghazaryan
orcid: 0000-0001-9666-3543
- first_name: Artem
full_name: Volosniev, Artem
id: 37D278BC-F248-11E8-B48F-1D18A9856A87
last_name: Volosniev
orcid: 0000-0003-0393-5525
citation:
ama: Varshney A, Ghazaryan A, Volosniev A. Classical ‘spin’ filtering with two degrees
of freedom and dissipation. Few-Body Systems. 2024;65. doi:10.1007/s00601-024-01880-x
apa: Varshney, A., Ghazaryan, A., & Volosniev, A. (2024). Classical ‘spin’ filtering
with two degrees of freedom and dissipation. Few-Body Systems. Springer
Nature. https://doi.org/10.1007/s00601-024-01880-x
chicago: Varshney, Atul, Areg Ghazaryan, and Artem Volosniev. “Classical ‘Spin’
Filtering with Two Degrees of Freedom and Dissipation.” Few-Body Systems.
Springer Nature, 2024. https://doi.org/10.1007/s00601-024-01880-x.
ieee: A. Varshney, A. Ghazaryan, and A. Volosniev, “Classical ‘spin’ filtering with
two degrees of freedom and dissipation,” Few-Body Systems, vol. 65. Springer
Nature, 2024.
ista: Varshney A, Ghazaryan A, Volosniev A. 2024. Classical ‘spin’ filtering with
two degrees of freedom and dissipation. Few-Body Systems. 65, 12.
mla: Varshney, Atul, et al. “Classical ‘Spin’ Filtering with Two Degrees of Freedom
and Dissipation.” Few-Body Systems, vol. 65, 12, Springer Nature, 2024,
doi:10.1007/s00601-024-01880-x.
short: A. Varshney, A. Ghazaryan, A. Volosniev, Few-Body Systems 65 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-03-01T11:39:33Z
date_published: 2024-02-17T00:00:00Z
date_updated: 2026-10-16T12:17:10Z
day: '17'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1007/s00601-024-01880-x
external_id:
arxiv:
- '2401.08454'
isi:
- '001163768200001'
file:
- access_level: open_access
checksum: c4e08cc7bc756da69b1b36fda7bb92fb
content_type: application/pdf
creator: dernst
date_created: 2024-03-04T07:07:10Z
date_updated: 2024-03-04T07:07:10Z
file_id: '15049'
file_name: 2024_FewBodySys_Varshney.pdf
file_size: 436712
relation: main_file
success: 1
file_date_updated: 2024-03-04T07:07:10Z
fulldoi: https://doi.org/10.1007/s00601-024-01880-x
has_accepted_license: '1'
intvolume: ' 65'
isi: 1
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
publication: Few-Body Systems
publication_identifier:
issn:
- 1432-5411
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Classical ‘spin’ filtering with two degrees of freedom and dissipation
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: 65
year: '2024'
...
---
_id: '14851'
abstract:
- lang: ger
text: Die Quantenrotation ist ein spannendes Phänomen, das in vielen verschiedenen
Systemen auftritt, von Molekülen und Atomen bis hin zu subatomaren Teilchen wie
Neutronen und Protonen. Durch den Einsatz von starken Laserpulsen ist es möglich,
die mathematisch anspruchsvolle Topologie der Rotation von Molekülen aufzudecken
und topologisch geschützte Zustände zu erzeugen, die unerwartetes Verhalten zeigen.
Diese Entdeckungen könnten Auswirkungen auf die Molekülphysik und physikalische
Chemie haben und die Entwicklung neuer Technologien ermöglichen. Die Verbindung
von Quantenrotation und Topologie stellt ein aufregendes, interdisziplinäres Forschungsfeld
dar und bietet neue Wege zur Kontrolle und Nutzung von quantenmechanischen Phänomenen.
article_processing_charge: Yes (via OA deal)
article_type: original
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. Die faszinierende Topologie rotierender Quanten. Physik
in unserer Zeit. 2024;55(1):28-33. doi:10.1002/piuz.202301690
apa: Karle, V., & Lemeshko, M. (2024). Die faszinierende Topologie rotierender
Quanten. Physik in unserer Zeit. Wiley. https://doi.org/10.1002/piuz.202301690
chicago: Karle, Volker, and Mikhail Lemeshko. “Die faszinierende Topologie rotierender
Quanten.” Physik in unserer Zeit. Wiley, 2024. https://doi.org/10.1002/piuz.202301690.
ieee: V. Karle and M. Lemeshko, “Die faszinierende Topologie rotierender Quanten,”
Physik in unserer Zeit, vol. 55, no. 1. Wiley, pp. 28–33, 2024.
ista: Karle V, Lemeshko M. 2024. Die faszinierende Topologie rotierender Quanten.
Physik in unserer Zeit. 55(1), 28–33.
mla: Karle, Volker, and Mikhail Lemeshko. “Die faszinierende Topologie rotierender
Quanten.” Physik in unserer Zeit, vol. 55, no. 1, Wiley, 2024, pp. 28–33,
doi:10.1002/piuz.202301690.
short: V. Karle, M. Lemeshko, Physik in unserer Zeit 55 (2024) 28–33.
corr_author: '1'
das_tickbox: '0'
date_created: 2024-01-22T08:19:36Z
date_published: 2024-01-01T00:00:00Z
date_updated: 2026-10-16T12:16:33Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1002/piuz.202301690
file:
- access_level: open_access
checksum: 3051dadcf9bc57da97e36b647c596ab1
content_type: application/pdf
creator: dernst
date_created: 2024-01-23T12:18:07Z
date_updated: 2024-01-23T12:18:07Z
file_id: '14878'
file_name: 2024_PhysikZeit_Karle.pdf
file_size: 1155244
relation: main_file
success: 1
file_date_updated: 2024-01-23T12:18:07Z
fulldoi: https://doi.org/10.1002/piuz.202301690
has_accepted_license: '1'
intvolume: ' 55'
issue: '1'
keyword:
- General Earth and Planetary Sciences
- General Environmental Science
language:
- iso: ger
month: '01'
oa: 1
oa_version: Published Version
page: 28-33
publication: Physik in unserer Zeit
publication_identifier:
eissn:
- 1521-3943
issn:
- 0031-9252
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
record:
- id: '19393'
relation: dissertation_contains
status: public
researchdata_availability: no
status: public
supplementarymaterial: no
title: Die faszinierende Topologie rotierender Quanten
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: 55
year: '2024'
...
---
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).
das_tickbox: '0'
date_created: 2024-12-08T23:01:55Z
date_published: 2024-11-18T00:00:00Z
date_updated: 2026-10-16T12:18:41Z
day: '18'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.110.053317
external_id:
arxiv:
- '2406.00217'
isi:
- '001362623400019'
fulldoi: https://doi.org/10.1103/PhysRevA.110.053317
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'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
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'
das_tickbox: '0'
date_created: 2024-03-24T23:00:59Z
date_published: 2024-03-19T00:00:00Z
date_updated: 2026-10-16T12:18:03Z
day: '19'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.109.033315
external_id:
arxiv:
- '2311.14536'
isi:
- '001198511300017'
fulldoi: https://doi.org/10.1103/PhysRevA.109.033315
intvolume: ' 109'
isi: 1
issue: '3'
language:
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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:
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publication_status: published
publisher: American Physical Society
quality_controlled: '1'
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status: public
supplementarymaterial: yes
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'
...