Quantum information dynamics in a high-dimensional parity-time-symmetric system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00534015" target="_blank" >RIV/61389005:_____/20:00534015 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevA.102.030201" target="_blank" >https://doi.org/10.1103/PhysRevA.102.030201</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.102.030201" target="_blank" >10.1103/PhysRevA.102.030201</a>
Alternative languages
Result language
angličtina
Original language name
Quantum information dynamics in a high-dimensional parity-time-symmetric system
Original language description
Non-Hermitian systems with parity-time (PT) symmetry give rise to exceptional points (EPs) with exceptional properties that arise due to the coalescence of eigenvectors. Such systems have been extensively explored in the classical domain, where second- or higher-order EPs have been proposed or realized. In contrast, quantum information studies of PT-symmetric systems have been confined to systems with a two-dimensional Hilbert space. Here, by using a single-photon interferometry setup, we simulate the quantum dynamics of a four-dimensional PT-symmetric system across a fourth-order exceptional point. By tracking the coherent, nonunitary evolution of the density matrix of the system in PT-symmetry unbroken and broken regions, we observe the entropy dynamics for both the entire system, and the gain and loss subsystems. Our setup is scalable to the higher-dimensional PT-symmetric systems, and our results point towards the rich dynamics and critical properties.
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
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
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
102
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
030201
UT code for WoS article
000573649400006
EID of the result in the Scopus database
2-s2.0-85093364321