Quantum Zeno effect and nonclassicality in a PT-symmetric system of coupled cavities
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73595377" target="_blank" >RIV/61989592:15310/19:73595377 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.99.023820" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.99.023820</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.99.023820" target="_blank" >10.1103/PhysRevA.99.023820</a>
Alternative languages
Result language
angličtina
Original language name
Quantum Zeno effect and nonclassicality in a PT-symmetric system of coupled cavities
Original language description
The interplay between the nonclassical features and the parity-time (PT) symmetry (or its breaking) is studied here by considering a PT-symmetric system consisting of two cavities with gain and loss. The conditions for PT invariance are obtained for this system. The behavior of the average photon number corresponding to the gain and loss modes for different initial states (e.g., vacuum, NOON, coherent, and thermal states) has also been obtained. With the help of the number operators, quantum Zeno and anti-Zeno effects are studied, and the observed behavior is compared in PT-symmetric (PTS) and PT-symmetry-broken (PTSB) regimes. It has been observed that the relative phase of the input coherent fields plays a key role in the occurrence of these effects. Further, some nonclassicality features are witnessed using criteria based on the number operator(s). Specifically, intermodal antibunching, sum, and difference squeezing are investigated for specific input states. It is found that the various nonclassical features, including the observed quantum Zeno and anti-Zeno effects, are suppressed when one goes from the PTS to PTSB regime. In other words, the dominance of the loss or gain rate in the field modes over the coupling strength between them diminishes the nonclassical features of the system.
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
<a href="/en/project/LO1305" target="_blank" >LO1305: Development of the center of advanced technologies and materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
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
99
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
"023820-1"-"023820-9"
UT code for WoS article
000458361300016
EID of the result in the Scopus database
2-s2.0-85061532103