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Thermality from a Rindler quench

Louko, Jorma



Ultracold fermionic atoms in an optical lattice, with a sudden position-dependent change (a quench) in the effective dispersion relation, have been proposed by Rodríguez-Laguna et al as an analogue spacetime test of the Unruh effect. We provide new support for this analogue by analysing a massless scalar field on a (1+1)-dimensional continuum spacetime with a similar quench: an early time Minkowski region is joined at a constant time surface, representing the quench, to a late time static region in which left and right asymptotically Rindler domains are connected by a smooth negative curvature bridge. We show that the quench is energetically mild, and late time static observers, modelled as a derivative-coupling Unruh–DeWitt detector, see thermality, in a temperature that equals the Unruh temperature for observers in the asymptotic Rindler domains. The Unruh effect hence prevails, despite the energy injected into the field by the quench and despite the absence of a late time Killing horizon. These results strengthen the motivation to realise the experimental proposal.


Louko, J. (2018). Thermality from a Rindler quench. Classical and Quantum Gravity, 35(20), 1-13. doi:10.1088/1361-6382/aadb34

Journal Article Type Article
Acceptance Date Aug 17, 2018
Online Publication Date Sep 27, 2018
Publication Date Oct 25, 2018
Deposit Date Oct 8, 2018
Publicly Available Date Sep 28, 2019
Journal Classical and Quantum Gravity
Print ISSN 0264-9381
Electronic ISSN 1361-6382
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 35
Issue 20
Article Number 205006
Pages 1-13
Keywords Unruh effect; Analogue spacetime; Unruh–DeWitt detector
Public URL
Publisher URL
Additional Information © 2018 IOP Publishing Ltd


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