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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| JHEP03(2017)068.pdf | 468.34 kB | Adobe PDF | 見る/開く |
| タイトル: | Vacuum state of the Dirac field in de Sitter space and entanglement entropy |
| 著者: | Kanno, Sugumi Sasaki, Misao Tanaka, Takahiro    https://orcid.org/0000-0001-8406-5183 (unconfirmed) |
| 著者名の別形: | 菅野, 優美 佐々木, 節 田中, 貴浩 |
| キーワード: | Classical Theories of Gravity Effective Field Theories |
| 発行日: | Mar-2017 |
| 出版者: | Springer Berlin Heidelberg |
| 誌名: | Journal of High Energy Physics |
| 巻: | 2017 |
| 号: | 03 |
| 論文番号: | 68 |
| 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 m(2)/H(2) becomes small, and the difference is maximal in the massless limit. |
| 記述: | JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0. |
| 著作権等: | © The Author(s) 2017 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. |
| URI: | http://hdl.handle.net/2433/229533 |
| DOI(出版社版): | 10.1007/JHEP03(2017)068 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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