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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.)

Vacuum induced dispersions on the motion of test particles in D+1 dimensions

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Camargo, G. H. S. [1] ; De Lorenci, V. A. [2] ; Ribeiro, C. C. H. [3] ; Rodrigues, F. F. [4]
Total Authors: 4
[1] Univ Fed Juiz De Fora, Inst Ciencias Exatas, BR-36036330 Juiz De Fora, MG - Brazil
[2] Univ Fed Itajuba, Inst Fis & Quim, BR-37500903 Itajuba, MG - Brazil
[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-15980900 Sao Carlos, SP - Brazil
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Physical Review D; v. 100, n. 6 SEP 23 2019.
Web of Science Citations: 0

When the vacuum state of a scalar or electromagnetic field is modified by the presence of a reflecting boundary, an interacting test particle undergoes velocity fluctuations. Such effect is regarded as a sort of quantum analog of the classical Brownian motion. Several aspects about this system have been recently investigated in the literature, for instance, finite temperature effects, curved spacetime framework, near-boundary regime, late time behavior, and subvacuum phenomena. Here, further steps are given in this analysis by considering the effect of vacuum fluctuations of a scalar field in the presence of a perfectly reflecting flat boundary over the motion of a scalar test particle when the background field does not satisfy the Huygens' principle. Specifically, the background field is allowed to have mass and the system is studied in D + 1 dimensions. A method of implementing a smooth transition between distinct states of the field is also developed, rendering regularized analytic expressions describing the velocity fluctuations of the test particle. This method is applied to study some special behaviors of the system. Possible applications include fields known to occur in nature as, for instance, the massive Higgs' field, for which the velocity fluctuations are here predicted to acquire a characteristic oscillation, thus behaving differently from their electromagnetic counterparts. (AU)

FAPESP's process: 15/26438-8 - Instability of fermionic, vectorial, and tensorial fields in curved spacetimes
Grantee:Caio Cesar Holanda Ribeiro
Support type: Scholarships in Brazil - Doctorate