Cosmological quantum entanglement

Martin-Martinez, E and Menicucci, N 2012, 'Cosmological quantum entanglement', Classical and Quantum Gravity, vol. 29, no. 22, 224003, pp. 1-30.


Document type: Journal Article
Collection: Journal Articles

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Title Cosmological quantum entanglement
Author(s) Martin-Martinez, E
Menicucci, N
Year 2012
Journal name Classical and Quantum Gravity
Volume number 29
Issue number 22
Article Number 224003
Start page 1
End page 30
Total pages 30
Publisher Institute of Physics Publishing
Abstract We review recent literature on the connection between quantum entanglement and cosmology, with an emphasis on the context of expanding universes. We discuss recent theoretical results reporting on the production of entanglement in quantum fields due to the expansion of the underlying spacetime. We explore how these results are affected by the statistics of the field (bosonic or fermionic), the type of expansion (de Sitter or asymptotically stationary), and the coupling to spacetime curvature (conformal or minimal). We then consider the extraction of entanglement from a quantum field by coupling to local detectors and how this procedure can be used to distinguish curvature from heating by their entanglement signature. We review the role played by quantum fluctuations in the early universe in nucleating the formation of galaxies and other cosmic structures through their conversion into classical density anisotropies during and after inflation. We report on current literature attempting to account for this transition in a rigorous way and discuss the importance of entanglement and decoherence in this process. We conclude with some prospects for further theoretical and experimental research in this area. These include extensions of current theoretical efforts, possible future observational pursuits, and experimental analogues that emulate these cosmic effects in a laboratory setting.
Subject Quantum Information, Computation and Communication
Field Theory and String Theory
DOI - identifier 10.1088/0264-9381/29/22/224003
Copyright notice © 2012 IOP Publishing Ltd
ISSN 0264-9381
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