Stabilization of product states and excited-state quantum phase transitions in a coupled qubit-field system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73608760" target="_blank" >RIV/61989592:15310/21:73608760 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/21:10439647
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.104.053722" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.104.053722</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.104.053722" target="_blank" >10.1103/PhysRevA.104.053722</a>
Alternative languages
Result language
angličtina
Original language name
Stabilization of product states and excited-state quantum phase transitions in a coupled qubit-field system
Original language description
We study a system of a single qubit (or a few qubits) interacting with a soft-mode bosonic field. Considering an extended version of the Rabi model with both parity-conserving and parity-violating interactions, we disclose a complex arrangement of quantum phase transitions in the ground-and excited-state domains. An experimentally testable signature of some of these transitions is a dynamical stabilization of a fully factorized qubit-field state involving the field vacuum. It happens in the ultrastrong coupling regime where the superradiant field equilibrium is far from the vacuum state. The degree of stabilization varies abruptly with interaction parameters and increases with the softness of the field mode. We analyze semiclassical origins of these effects and show their connection to various forms of excited-state quantum phase transitions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW A
ISSN
2469-9926
e-ISSN
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Volume of the periodical
104
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
"053722-1"-"053722-14"
UT code for WoS article
000724633700007
EID of the result in the Scopus database
2-s2.0-85120528203