Some entanglement features exhibited by two, three and four qubits interacting with an environment in a non-Markovian regime

dc.contributor.authorHamadou-Ibrahim, A.
dc.contributor.authorPlastino, Angel Ricardo (Angelo)
dc.contributor.authorZander, Claudia
dc.date.accessioned2011-01-14T06:43:27Z
dc.date.available2011-01-14T06:43:27Z
dc.date.issued2010-01
dc.description.abstractWe explore various aspects of the quantum entanglement dynamics of systems of two, three and four qubits interacting with an environment at zero temperature in a non-Markovian regime, as described by the paradigmatic model recently studied by Bellomo, Lo Franco, and Compagno [Bellomo et al. Phys. Rev. Lett. 99 (2007) 160502]. We consider important families of initial states for the alluded systems. The average, typical entanglement evolution associated with each of these families is determined, and its relation with the evolution of the global degree of mixedness of the multi-qubit system is explored. For three and four qubits we consider the family of initial states equivalent under local unitary transformations to the jGHZi and jWi states, and compare their average behavior with the average behavior exhibited by initial maximally entangled twoqubits states. Furthermore, in the case of two qubits, the evolution of other manifestations of entanglement, related to measurable quantities, is also investigated. In particular, we consider the Mintert-Buchleitner concurrence lower bound and an entanglement indicator based upon the violation of local uncertainty relations.en
dc.description.sponsorshipThe financial assistance of the National Research Foundation (NRF; South African Agency) towards this research is hereby acknowledged. This work was partially supported by the Projects FQM-2445 and FQM-207 of the Junta de Andalucia (Spain).en_US
dc.identifier.citationHamadou-Ibrahim, A, Plastino, AR & Zander, C 2010, 'Some entanglement features exhibited by two, three and four qubits interacting with an environment in a non-Markovian regime', Journal of Physics A-Mathematical and Theoretical, vol. 43, no. 5, pp. 1-18. [http://www.iop.org/EJ/journal/JPhysA]en
dc.identifier.issn1751-8121
dc.identifier.other10.1088/1751-8113/43/5/055305
dc.identifier.urihttp://hdl.handle.net/2263/15731
dc.language.isoenen_US
dc.publisherInstitute of Physicsen_US
dc.rights© 2010 IOP Publishing Ltden
dc.subjectEntanglement dynamicsen
dc.subjectDecoherenceen
dc.titleSome entanglement features exhibited by two, three and four qubits interacting with an environment in a non-Markovian regimeen
dc.typePostprint Articleen

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