Entanglement structure in expanding universes

Yasusada Nambu

doi:10.3390/e15051847

Entanglement structure in expanding universes

Yasusada Nambu

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1847-1874
Number of pages	28
Journal	Entropy
Volume	15
Issue number	5
DOIs	https://doi.org/10.3390/e15051847
Publication status	Published - May 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.3390/e15051847

Cite this

@article{c0f4fade49ae4ea0a6fa0f3820b63654,

title = "Entanglement structure in expanding universes",

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.",

author = "Yasusada Nambu",

year = "2013",

month = may,

doi = "10.3390/e15051847",

language = "English",

volume = "15",

pages = "1847--1874",

journal = "Entropy",

issn = "1099-4300",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "5",

}

TY - JOUR

T1 - Entanglement structure in expanding universes

AU - Nambu, Yasusada

PY - 2013/5

Y1 - 2013/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84878444110&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84878444110&partnerID=8YFLogxK

U2 - 10.3390/e15051847

DO - 10.3390/e15051847

M3 - Article

AN - SCOPUS:84878444110

SN - 1099-4300

VL - 15

SP - 1847

EP - 1874

JO - Entropy

JF - Entropy

IS - 5

ER -

Entanglement structure in expanding universes

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this