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- Title
Entanglement Structure in Expanding Universes.
- Authors
Nambu, Yasusada
- 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.
- Subjects
QUANTUM entanglement; EXPANDING universe; QUANTUM field theory; PARTICLE detectors; SCALAR field theory; HUBBLE'S law
- Publication
Entropy, 2013, Vol 15, Issue 6, p1847
- ISSN
1099-4300
- Publication type
Article
- DOI
10.3390/e15051847