Maximally genuine multipartite entangled mixed X-states of N-qubits

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMendonca, Paulo E. M. F.
dc.creatorRafsanjani, Seyed Mohammad Hashemi
dc.creatorGaletti, Diogenes
dc.creatorMarchiolli, Marcelo A.
dc.date2015-10-21T18:16:49Z
dc.date2016-10-25T21:07:34Z
dc.date2015-10-21T18:16:49Z
dc.date2016-10-25T21:07:34Z
dc.date2015-05-29
dc.date.accessioned2017-04-06T09:05:00Z
dc.date.available2017-04-06T09:05:00Z
dc.identifierJournal Of Physics A-mathematical And Theoretical. Bristol: Iop Publishing Ltd, v. 48, n. 21, p. 1-21, 2015.
dc.identifier1751-8113
dc.identifierhttp://hdl.handle.net/11449/128955
dc.identifierhttp://acervodigital.unesp.br/handle/11449/128955
dc.identifierhttp://dx.doi.org/10.1088/1751-8113/48/21/215304
dc.identifierWOS:000354390700010
dc.identifierWOS000354390700010.pdf
dc.identifierhttp://iopscience.iop.org/article/10.1088/1751-8113/48/21/215304/meta;jsessionid=13A8C4D8E6CCFDF9ECF6EF03978759D1.c1
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/939510
dc.descriptionFor every possible spectrum of 2(N)-dimensional density operators, we construct an N-qubit X-state of the same spectrum and maximal genuine multipartite (GM-) concurrence, hence characterizing a global unitary transformation that -constrained to output X-states-maximizes the GM-concurrence of an arbitrary input mixed state of N qubits. We also apply semidefinite programming methods to obtain N-qubit X-states with maximal GM-concurrence for a given purity and to provide an alternative proof of optimality of a recently proposed set of density matrices for the purpose, the so-called X-MEMS. Furthermore, we introduce a numerical strategy to tailor a quantum operation that converts between any two given density matrices using a relatively small number of Kraus operators. We apply our strategy to design short operator-sum representations for the transformation between any given N-qubit mixed state and a corresponding X-MEMS of the same purity.
dc.languageeng
dc.publisherIop Publishing Ltd
dc.relationJournal Of Physics A-mathematical And Theoretical
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectEntanglement
dc.subjectGenuine multipartite concurrence
dc.subjectN-qubit X-states
dc.titleMaximally genuine multipartite entangled mixed X-states of N-qubits
dc.typeOtro


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