Entanglement Structure in Expanding Universes

Entropy

关键词: entanglement;    particle detector;    inflation;    measurement;   

DOI  :  10.3390/e15051847

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.