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dc.contributor.authorGadelha, A. L.
dc.contributor.authorMarchioro, Dafni Z.
dc.contributor.authorNedel, Daniel L.
dc.date.accessioned2014-05-20T14:06:24Z
dc.date.available2014-05-20T14:06:24Z
dc.date.issued2006-08-10
dc.identifierhttp://dx.doi.org/10.1016/j.physletb.2006.06.044
dc.identifier.citationPhysics Letters B. Amsterdam: Elsevier B.V., v. 639, n. 3-4, p. 383-388, 2006.
dc.identifier.issn0370-2693
dc.identifier.urihttp://hdl.handle.net/11449/23302
dc.description.abstractIn this Letter new aspects of string theory propagating in a pp-wave time dependent background with a null singularity are explored. It is shown the appearance of a 2d entanglement entropy dynamically generated by the background. For asymptotically flat observers, the vacuum close to the singularity is unitarily inequivalent to the vacuum at tau = -infinity and it is shown that the 2d entanglement entropy diverges close to this point. As a consequence. The positive time region is inaccessible for observers in tau = -infinity. For a stationary measure, the vacuum at finite time is seen by those observers as a thermal state and the information loss is encoded as a heat bath of string states. (c) 2006 Elsevier B.V. All rights reserved.en
dc.format.extent383-388
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofPhysics Letters B
dc.sourceWeb of Science
dc.titleEntanglement and entropy operator for strings in pp-wave time dependent backgrounden
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.description.affiliationUnespUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.identifier.doi10.1016/j.physletb.2006.06.044
dc.identifier.wosWOS:000239676500039
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Física Teórica (IFT), São Paulopt
dc.relation.ispartofjcr4.254
dc.relation.ispartofsjr2,336
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