Entanglement Structure in Expanding Universes

2013/05/17 by Yasusada Nambu · 1 citation
Physics and Astronomy · #gr-qc #quant-ph

paper · pdf · doi:10.3390/e15051847

published as Entropy 2013, 15(3) 1847-1874 · 29 pages. arXiv admin note: text overlap with arXiv:1105.5212

arxiv created 2013/05/17 · arxiv updated 2015/06/16

Abstract

We investigate entanglement of a quantum field in de Sitter spacetime using a particle detector model. By considering the entanglement between two comoving detectors interacting with a scalar field, it is possible to detect the entanglement of the scalar field by swapping it to detectors. For the massless minimal scalar field, we find that the entanglement between the detectors cannot be detected when their physical separation exceeds the Hubble horizon scale. This behavior supports the appearance of the classical nature of quantum fluctuations generated during the inflationary era.

Citations

• Classical and Quantum Correlations of Scalar Field in the Inflationary Universe

Cited by

• Entanglement Harvesting from Quantum Field: Insights via the Partner Formula

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