{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T17:26:50Z","timestamp":1779125210900,"version":"3.51.4"},"reference-count":96,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2020,7,18]],"date-time":"2020-07-18T00:00:00Z","timestamp":1595030400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"CNCS-UEFISCDI of the Romanian Ministry of Research and Innovation","award":["PN-III-P4-ID-PCE-2016-0794"],"award-info":[{"award-number":["PN-III-P4-ID-PCE-2016-0794"]}]},{"name":"Romanian Ministry of Education and Researc","award":["PN 19 06 01 01\/2019"],"award-info":[{"award-number":["PN 19 06 01 01\/2019"]}]},{"name":"University of Palermo, in memory of Francesca Palumbo","award":["research funds difc 3100050001d08+"],"award-info":[{"award-number":["research funds difc 3100050001d08+"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/e22070785","type":"journal-article","created":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T06:08:17Z","timestamp":1595225297000},"page":"785","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems"],"prefix":"10.3390","volume":"22","author":[{"given":"Iulia","family":"Ghiu","sequence":"first","affiliation":[{"name":"Faculty of Physics, Centre for Advanced Quantum Physics, University of Bucharest, P.O. Box MG-11, R-077125 Bucharest-Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2363-7699","authenticated-orcid":false,"given":"Roberto","family":"Grimaudo","sequence":"additional","affiliation":[{"name":"Dipartimento di Fisica e Chimica dell\u2019Universit\u00e0 di Palermo, Via Archirafi 36, I-90123 Palermo, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatiana","family":"Mihaescu","sequence":"additional","affiliation":[{"name":"Faculty of Physics, University of Bucharest, P.O. Box MG-11, R-077125 Bucharest-Magurele, Romania"},{"name":"Department of Theoretical Physics, National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, R-077125 Bucharest-Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aurelian","family":"Isar","sequence":"additional","affiliation":[{"name":"Department of Theoretical Physics, National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, R-077125 Bucharest-Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonino","family":"Messina","sequence":"additional","affiliation":[{"name":"Dipartimento di Matematica ed Informatica dell\u2019Universit\u00e0 di Palermo, Via Archirafi 34, I-90123 Palermo, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"598","DOI":"10.1126\/science.1167343","article-title":"Sudden Death of Entanglement","volume":"323","author":"Yu","year":"2009","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"S45","DOI":"10.1088\/0953-4075\/40\/9\/S02","article-title":"Pairwise concurrence dynamics: A four-qubit model","volume":"40","author":"Yonac","year":"2007","journal-title":"J. Phys. B At. Mol. Opt. 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