Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems

We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment...

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Autores principales: Ghiu, Iulia, Grimaudo, Roberto, Mihaescu, Tatiana, Isar, Aurelian, Messina, Antonino
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517345/
https://www.ncbi.nlm.nih.gov/pubmed/33286556
http://dx.doi.org/10.3390/e22070785
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author Ghiu, Iulia
Grimaudo, Roberto
Mihaescu, Tatiana
Isar, Aurelian
Messina, Antonino
author_facet Ghiu, Iulia
Grimaudo, Roberto
Mihaescu, Tatiana
Isar, Aurelian
Messina, Antonino
author_sort Ghiu, Iulia
collection PubMed
description We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the X structure of the initial state. The quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state.
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spelling pubmed-75173452020-11-09 Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems Ghiu, Iulia Grimaudo, Roberto Mihaescu, Tatiana Isar, Aurelian Messina, Antonino Entropy (Basel) Article We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the X structure of the initial state. The quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state. MDPI 2020-07-18 /pmc/articles/PMC7517345/ /pubmed/33286556 http://dx.doi.org/10.3390/e22070785 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ghiu, Iulia
Grimaudo, Roberto
Mihaescu, Tatiana
Isar, Aurelian
Messina, Antonino
Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title_full Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title_fullStr Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title_full_unstemmed Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title_short Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
title_sort quantum correlation dynamics in controlled two-coupled-qubit systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517345/
https://www.ncbi.nlm.nih.gov/pubmed/33286556
http://dx.doi.org/10.3390/e22070785
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