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- W3100795439 abstract "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." @default.
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- W3100795439 date "2017-03-01" @default.
- W3100795439 modified "2023-09-26" @default.
- W3100795439 title "Vacuum state of the Dirac field in de Sitter space and entanglement entropy" @default.
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- W3100795439 doi "https://doi.org/10.1007/jhep03(2017)068" @default.
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