Thermodynamically allowed phantom cosmology with viscous fluid

Miguel Cruz, Samuel Lepe, and Sergei D. Odintsov

Phys. Rev. D 98, 083515 – Published 10 October 2018

Abstract

In this work, we present an analysis of the phantom zone in a causal viscous cosmology from a thermodynamic point of view. In this description, we consider a chemical potential and the approach of irreversible processes. We assume a flat universe filled with a single dissipative fluid described by a barotropic equation of state, $p = ω ρ$ . This model allows us to construct a negative chemical potential for the phantom regime and have positive definite temperature and entropy.

Received 13 August 2018
Revised 19 September 2018

DOI:https://doi.org/10.1103/PhysRevD.98.083515

Physics Subject Headings (PhySH)

Dark energy Evolution of the Universe

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Miguel Cruz^*

Facultad de Física, Universidad Veracruzana, 91000 Xalapa, Veracruz, México

Samuel Lepe^†

Instituto de Física, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 4950, Valparaíso, Chile

Sergei D. Odintsov^‡

Institut de Ciències de l’Espai, ICE/CSIC-IEEC, Campus UAB, Carrer de Can Magrans s/n, 08193 Bellaterra (Barcelona), Spain, Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain, Tomsk State Pedagogical University, 634061 Tomsk, Russia and Int. Lab. for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), 634050 Tomsk, Russia

^*miguelcruz02@uv.mx
^†samuel.lepe@pucv.cl
^‡odintsov@ieec.uab.es, odintsov@ice.csic.es

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Issue

Vol. 98, Iss. 8 — 15 October 2018

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Physical Review D

covering particles, fields, gravitation, and cosmology