Sending classical information through relativistic quantum channels

dc.contributor.authorLandulfo, André G. S.
dc.contributor.authorTorres, Adriano C. [UNESP]
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:00Z
dc.date.available2014-05-27T11:29:00Z
dc.date.issued2013-04-29
dc.description.abstractWe investigate how special relativity influences the transmission of classical information through quantum channels by evaluating the Holevo bound when the sender and the receiver are in (relativistic) relative motion. By using the spin degrees of freedom of spin-1/2 fermions to encode the classical information, we show that, for some configurations, the accessible information in the receiver can be increased when the spin detector moves fast enough. This is possible by allowing the momentum wave packet of one of the particles to be sufficiently wide while the momentum wave packets of other particles are kept relatively narrow. In this way, one can take advantage of the fact that boosts entangle the spin and momentum degrees of freedom of spin-1/2 fermions to increase the accessible information in the former. We close the paper with a discussion of how this relativistic quantum channel cannot in general be described by completely positive quantum maps. © 2013 American Physical Society.en
dc.description.affiliationCentro de Ciências Naturais e Humanas Universidade Federal Do ABC, Rua Santa Adélia 166, 09210-170, Santo André, São Paulo
dc.description.affiliationInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco. II, 01140-070, São Paulo, São Paulo
dc.description.affiliationUnespInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco. II, 01140-070, São Paulo, São Paulo
dc.identifierhttp://dx.doi.org/10.1103/PhysRevA.87.042339
dc.identifier.citationPhysical Review A - Atomic, Molecular, and Optical Physics, v. 87, n. 4, 2013.
dc.identifier.doi10.1103/PhysRevA.87.042339
dc.identifier.file2-s2.0-84877749111.pdf
dc.identifier.issn1050-2947
dc.identifier.issn1094-1622
dc.identifier.scopus2-s2.0-84877749111
dc.identifier.urihttp://hdl.handle.net/11449/75181
dc.identifier.wosWOS:000318502000007
dc.language.isoeng
dc.relation.ispartofPhysical Review A: Atomic, Molecular, and Optical Physics
dc.relation.ispartofsjr1,288
dc.relation.ispartofsjr1,288
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectAccessible information
dc.subjectClassical information
dc.subjectCompletely positive
dc.subjectQuantum channel
dc.subjectRelative motion
dc.subjectSpecial relativity
dc.subjectSpin degrees of freedom
dc.subjectSpin-1/2 fermions
dc.subjectWave packets
dc.subjectQuantum entanglement
dc.titleSending classical information through relativistic quantum channelsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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