Classical and quantum correlations of scalar field in the inflationary universe

Yasusada Nambu, Yuji Ohsumi

研究成果: ジャーナルへの寄稿学術誌査読

38 被引用数 (Scopus)

抄録

We investigate classical and quantum correlations of a quantum field in the inflationary universe using a particle detector model. By considering the entanglement and correlations between two comoving detectors interacting with a scalar field, we find that the entanglement between the detectors becomes zero after their physical separation exceeds the Hubble horizon. Furthermore, the quantum discord, which is defined as the quantum part of total correlation, approaches zero on the super horizon scale. These behaviors support the appearance of the classical nature of the quantum fluctuation generated during the inflationary era.

本文言語英語
論文番号044028
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
84
4
DOI
出版ステータス出版済み - 8月 8 2011
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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