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dc.contributor.authorGadelha, A. L.-
dc.contributor.authorMarchioro, Dafni Z.-
dc.contributor.authorNedel, Daniel L.-
dc.identifier.citationPhysics Letters B. Amsterdam: Elsevier B.V., v. 639, n. 3-4, p. 383-388, 2006.-
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.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.titleEntanglement and entropy operator for strings in pp-wave time dependent backgrounden
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.rights.accessRightsAcesso restrito-
dc.relation.ispartofPhysics Letters B-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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