Next Article in Journal / Special Issue
Genuine Tripartite Entanglement and Nonlocality in Bose-Einstein Condensates by Collective Atomic Recoil
Previous Article in Journal
A Unification between Dynamical System Theory and Thermodynamics Involving an Energy, Mass, and Entropy State Space Formalism
Previous Article in Special Issue
Quantum Entanglement Concentration Based on Nonlinear Optics for Quantum Communications
Entropy 2013, 15(5), 1847-1874; doi:10.3390/e15051847

Entanglement Structure in Expanding Universes

Received: 15 April 2013 / Revised: 7 May 2013 / Accepted: 13 May 2013 / Published: 16 May 2013
(This article belongs to the Special Issue Quantum Information 2012)
Download PDF [1471 KB, uploaded 24 February 2015]
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.
Keywords: entanglement; particle detector; inflation; measurement entanglement; particle detector; inflation; measurement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |

MDPI and ACS Style

Nambu, Y. Entanglement Structure in Expanding Universes. Entropy 2013, 15, 1847-1874.

AMA Style

Nambu Y. Entanglement Structure in Expanding Universes. Entropy. 2013; 15(5):1847-1874.

Chicago/Turabian Style

Nambu, Yasusada. 2013. "Entanglement Structure in Expanding Universes." Entropy 15, no. 5: 1847-1874.

Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert