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

Sugumi Kanno, Misao Sasaki, Takahiro Tanaka

研究成果: Contribution to journalArticle査読

16 被引用数 (Scopus)

抄録

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 m2/H2 becomes small, and the difference is maximal in the massless limit.

本文言語英語
論文番号68
ジャーナルJournal of High Energy Physics
2017
3
DOI
出版ステータス出版済み - 3 1 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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