Closed string thermal torus from thermo field dynamics

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dc.contributor.authorAbdalla, MCB
dc.contributor.authorGadelha, A. L.
dc.contributor.authorNedel, D. L.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:06:19Z
dc.date.available2014-05-20T14:06:19Z
dc.date.issued2005-05-05
dc.description.abstractIn this Letter a topological interpretation for the string thermal vacuum in the thermo field dynamics (TFD) approach is given. As a consequence, the relationship between the imaginary time and TFD formalisms is achieved when both are used to study closed strings at finite temperature. The TFD approach starts by duplicating the system's degrees of freedom, defining an auxiliary (tilde) string. In order to lead the system to finite temperature a Bogoliubov transformation is implemented. We show that the effect of this transformation is to glue together the string and the tilde string to obtain a torus. The thermal vacuum appears as the boundary state for this identification. Also, from the thermal state condition, a Kubo-Martin-Schwinger condition for the torus topology is derived. © 2005 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.description.affiliationUnespUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.format.extent213-220
dc.identifierhttp://dx.doi.org/10.1016/j.physletb.2005.03.048
dc.identifier.citationPhysics Letters B. Amsterdam: Elsevier B.V., v. 613, n. 3-4, p. 213-220, 2005.
dc.identifier.doi10.1016/j.physletb.2005.03.048
dc.identifier.issn0370-2693
dc.identifier.urihttp://hdl.handle.net/11449/23282
dc.identifier.wosWOS:000228936000014
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofPhysics Letters B
dc.relation.ispartofjcr4.254
dc.relation.ispartofsjr2,336
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleClosed string thermal torus from thermo field dynamicsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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