Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP03(2017)068
Keywords
Classical Theories of Gravity; Effective Field Theories
Categories
Funding
- IKERBASQUE
- Basque Foundation for Science
- Basque Government [IT-979-16]
- Spanish Ministry MINECO [FPA2015-64041-C2-1P]
- MEXT KAKENHI [15H05888, 15K21733, 24103001, 24103006, 15H02087, 26287044]
- Grants-in-Aid for Scientific Research [15H02087, 26287044, 15H05888, 24103006] Funding Source: KAKEN
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We 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.
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