Large scale quantum entanglement in de Sitter spacetime

Akira Matsumura, Yasusada Nambu

研究成果: ジャーナルへの寄稿学術誌査読

11 被引用数 (Scopus)

抄録

We investigate quantum entanglement between two symmetric spatial regions in de Sitter space with the Bunch-Davies vacuum. As a discretized model of the scalar field for numerical simulation, we consider a harmonic chain model. Using the coarse-grained variables for the scalar field, it is shown that the multipartite entanglement on the superhorizon scale exists by checking the monogamy relation for the negativity which quantifies the entanglement between the two regions. Further, we consider the continuous limit of this model without coarse-graining and find that non-zero values of the logarithmic negativity exist even if the distance between two spatial regions is larger than the Hubble horizon scale.

本文言語英語
論文番号025004
ジャーナルPhysical Review D
98
2
DOI
出版ステータス出版済み - 7月 15 2018
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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