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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.)

Quantum to classical transition in the Horava-Lifshitz quantum cosmology

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Author(s):
Bernardini, A. E. [1] ; Leal, P. [1, 2] ; Bertolami, O. [1, 2]
Total Authors: 3
Affiliation:
[1] Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre 687, P-4169007 Oporto - Portugal
[2] Ctr Fis Porto, Rua Campo Alegre 687, P-4169007 Oporto - Portugal
Total Affiliations: 2
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 2 FEB 2018.
Web of Science Citations: 2
Abstract

A quasi-Gaussian quantum superposition of Horava-Lifshitz (HL) stationary states is built in order to describe the transition of the quantum cosmological problem to the related classical dynamics. The obtained HL phase-space superposed Wigner function and its associated Wigner currents describe the conditions for the matching between classical and quantum phase-space trajectories. The matching quantum superposition parameter is associated to the total energy of the classical trajectory which, at the same time, drives the engendered Wigner function to the classical stationary regime. Through the analysis of the Wigner flows, the quantum fluctuations that distort the classical regime can be quanti fied as a measure of (non) classicality. Finally, the modifications to the Wigner currents due to the inclusion of perturbative potentials are computed in the HL quantum cosmological context. In particular, the inclusion of a cosmological constant provides complementary information that allows for connecting the age of the Universe with the overall stiff matter density profile. (AU)

FAPESP's process: 17/02294-2 - The classical-quantum correspondence of cosmological scenarios from the analysis of Quantum Decoherence and Gaussian correlations
Grantee:Alex Eduardo de Bernardini
Support type: Scholarships abroad - Research