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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
Bestelakorik adierazi ezean, itemaren baimena horrela deskribatzen da: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