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Vacuum state of the Dirac field in de Sitter space and entanglement entropy

dc.contributor.authorKanno, Sugumi
dc.contributor.authorSasaki, Misao
dc.contributor.authorTanaka, Takahiro
dc.date.accessioned2017-05-11T07:47:24Z
dc.date.available2017-05-11T07:47:24Z
dc.date.issued2017-03-13
dc.identifier.citationJournal in High Energy Physics 3 : (2017) // Article ID 068es_ES
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10810/21502
dc.description.abstractWe compute the entanglement entropy of a free massive Dirac field between two causally disconnected open charts in de Sitter space. We first derive the Bunch-Davies vacuum mode functions of the Dirac field. We find there exists no supercurvature mode for the Dirac field. We then give the Bogoliubov transformation between the Bunch-Davies vacuum and the open chart vacua that makes the reduced density matrix diagonal. We find that the Dirac field becomes more entangled than a scalar field as m(2)/H-2 becomes small, and the difference is maximal in the massless limit.es_ES
dc.description.sponsorshipWe would like to thank Jiro Soda for valuable discussions, suggestions and comments. SK was supported by IKERBASQUE, the Basque Foundation for Science and the Basque Government (IT-979-16), and Spanish Ministry MINECO (FPA2015-64041-C2-1P). This work was supported in part by MEXT KAKENHI Nos. 15H05888, 15K21733, 24103001, 24103006, 15H02087 and 26287044.es_ES
dc.language.isoenges_ES
dc.publisherSpringeres_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/FPA2015-64041-C2-1P
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subjectclassical theories of gravityes_ES
dc.subjecteffective field theorieses_ES
dc.titleVacuum state of the Dirac field in de Sitter space and entanglement entropyes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holderThis article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are creditedes_ES
dc.rights.holderAtribución 3.0 España*
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2FJHEP03%282017%29068es_ES
dc.identifier.doi10.1007/JHEP03(2017)068
dc.departamentoesFísica teórica e historia de la cienciaes_ES
dc.departamentoeuFisika teorikoa eta zientziaren historiaes_ES
dc.subject.categoriaPHYSICS, NUCLEAR


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This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited
Except where otherwise noted, this item's license is described as This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited