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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Probing the Unruh effect with an accelerated extended system

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Uliana Lima, Cesar A. [1] ; Brito, Frederico [1] ; Hoyos, Jose A. [1] ; Turolla Vanzella, Daniel A. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: NATURE COMMUNICATIONS; v. 10, JUL 10 2019.
Web of Science Citations: 1

It has been proved in the context of quantum fields in Minkowski spacetime that the vacuum state is a thermal state according to uniformly accelerated observers-a seminal result known as the Unruh effect. Recent claims, however, have challenged the validity of this result for extended systems, thus casting doubts on its physical reality. Here, we study the dynamics of an extended system, uniformly accelerated in the vacuum. We show that its reduced density matrix evolves to a Gibbs thermal state with local temperature given by the Unruh temperature T-U = ha/(2 pi ck(B)), where a is the system's spatial-dependent proper acceleration-c is the speed of light and k(B) and h are the Boltzmann's and the reduced Planck's constants, respectively. This proves that the vacuum state does induce thermalization of an accelerated extended system-which is all one can expect of a legitimate thermal reservoir. (AU)

FAPESP's process: 15/23849-7 - Quantum spin chains
Grantee:Francisco Castilho Alcaraz
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/12165-4 - Quantum phenomena in curved spacetimes
Grantee:Daniel Augusto Turolla Vanzella
Support type: Regular Research Grants
FAPESP's process: 12/24728-0 - Finite-temperature quantum field theory and the Unruh effect
Grantee:Cesar Augustus Uliana Lima
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/10826-1 - Multi-user equipment approved in grant 2015/23849-7: computer cluster
Grantee:Francisco Castilho Alcaraz
Support type: Multi-user Equipment Program