Analysis of entanglement measures and LOCC maximized quantum fisher information of general two qubit systems

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dc.authorid0000-0002-5872-9158
dc.authorid0000-0003-2383-4705
dc.contributor.authorErol, Volkanen_US
dc.contributor.authorÖzaydın, Fatihen_US
dc.contributor.authorAltıntaş, Azmi Alien_US
dc.date.accessioned2015-01-15T23:02:50Z
dc.date.available2015-01-15T23:02:50Z
dc.date.issued2014-06-24
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Enformasyon Teknolojileri Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Information Technologiesen_US
dc.description.abstractEntanglement has been studied extensively for unveiling the mysteries of non-classical correlations between quantum systems. In the bipartite case, there are well known measures for quantifying entanglement such as concurrence, relative entropy of entanglement (REE) and negativity, which cannot be increased via local operations. It was found that for sets of non-maximally entangled states of two qubits, comparing these entanglement measures may lead to different entanglement orderings of the states. On the other hand, although it is not an entanglement measure and not monotonic under local operations, due to its ability of detecting multipartite entanglement, quantum Fisher information (QFI) has recently received an intense attraction generally with entanglement in the focus. In this work, we revisit the state ordering problem of general two qubit states. Generating a thousand random quantum states and performing an optimization based on local general rotations of each qubit, we calculate the maximal QFI for each state. We analyze the maximized QFI in comparison with concurrence, REE and negativity and obtain new state orderings. We show that there are pairs of states having equal maximized QFI but different values for concurrence, REE and negativity and vice versa.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationErol, V., Özaydın, F. & Altıntaş, A. A. (2014). Analysis of entanglement measures and LOCC maximized quantum fisher information of general two qubit systems. SCIENTIFIC REPORTS, 4, 1-4. doi:10.1038/srep05422en_US
dc.identifier.doi10.1038/srep05422
dc.identifier.endpage4
dc.identifier.issn2045-2322
dc.identifier.pmid24957694
dc.identifier.scopus2-s2.0-84903185235
dc.identifier.scopusqualityQ1
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/11729/528
dc.identifier.urihttp://dx.doi.org/10.1038/srep05422
dc.identifier.volume4
dc.identifier.wosWOS:000337889800001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorÖzaydın, Fatihen_US
dc.institutionauthorid0000-0002-5872-9158
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherNature Publishing Groupen_US
dc.relation.ispartofScientific Reportsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDensity-matricesen_US
dc.subjectStatesen_US
dc.subjectSeparabilityen_US
dc.subjectNegativityen_US
dc.titleAnalysis of entanglement measures and LOCC maximized quantum fisher information of general two qubit systemsen_US
dc.typeArticleen_US
dspace.entity.typePublication

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