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From quantum to classical instability in relativistic stars

dc.contributor.authorLandulfo, Andre G. S.
dc.contributor.authorLima, William C. C. [UNESP]
dc.contributor.authorMatsas, George E. A. [UNESP]
dc.contributor.authorVanzella, Daniel A. T.
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2015-10-21T19:54:51Z
dc.date.available2015-10-21T19:54:51Z
dc.date.issued2015-01-07
dc.description.abstractIt has been shown that gravitational fields produced by realistic classical-matter distributions can force quantum vacuum fluctuations of some nonminimally coupled free scalar fields to undergo a phase of exponential growth. The consequences of this unstable phase for the background spacetime have not been addressed so far due to known difficulties concerning backreaction in semiclassical gravity. It seems reasonable to believe, however, that the quantum fluctuations will "classicalize" when they become large enough, after which backreaction can be treated in the general-relativistic context. Here we investigate the emergence of a classical regime out of the quantum field evolution during the unstable phase. By studying the appearance of classical correlations and loss of quantum coherence, we show that by the time backreaction becomes important the system already behaves classically. Consequently, the gravity-induced instability leads naturally to initial conditions for the eventual classical description of the backreaction. Our results give support to previous analyses which treat classically the instability of scalar fields in the spacetime of relativistic stars, regardless of whether the instability is triggered by classical or quantum perturbations.en
dc.description.affiliationUniv Fed ABC, Ctr Ciencias Nat &Humanas, BR-09210580 Sao Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUniv Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Instituto de Física Teórica (IFT), BR-01140070 Sao Paulo, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 610020/2009-9
dc.description.sponsorshipIdFAPESP: 2008/57856-6
dc.description.sponsorshipIdFAPESP: 2012/00737-0
dc.description.sponsorshipIdFAPESP: 2007/55449-1
dc.description.sponsorshipIdFAPESP: 2013/12165-4
dc.format.extent1-16
dc.identifierhttp://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.024011
dc.identifier.citationPhysical Review D, v. 91, n. 2, p. 1-16, 2015.
dc.identifier.doi10.1103/PhysRevD.91.024011
dc.identifier.issn1550-7998
dc.identifier.urihttp://hdl.handle.net/11449/128965
dc.identifier.wosWOS:000348570300004
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review D
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleFrom quantum to classical instability in relativistic starsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.author.orcid0000-0002-6980-9313[3]
unesp.author.orcid0000-0003-4426-4668[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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