Next Article in Journal
Entropies from Coarse-graining: Convex Polytopes vs. Ellipsoids
Next Article in Special Issue
Modified Gravity Models Admitting Second Order Equations of Motion
Previous Article in Journal
Metrics and Energy Landscapes in Irreversible Thermodynamics
Previous Article in Special Issue
Scale-Invariant Rotating Black Holes in Quadratic Gravity
Article Menu

Export Article

Open AccessArticle
Entropy 2015, 17(9), 6318-6328; doi:10.3390/e17096318

Viscosity-Induced Crossing of the Phantom Barrier

Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
Academic Editor: Remo Garattini
Received: 31 July 2015 / Revised: 6 September 2015 / Accepted: 8 September 2015 / Published: 14 September 2015
(This article belongs to the Special Issue Entropy in Quantum Gravity and Quantum Cosmology)
View Full-Text   |   Download PDF [204 KB, uploaded 14 September 2015]

Abstract

We show explicitly, by using astrophysical data plus reasonable assumptions for the bulk viscosity in the cosmic fluid, how the magnitude of this viscosity may be high enough to drive the fluid from its position in the quintessence region at present time t = 0 across the barrier w = −1 into the phantom region in the late universe. The phantom barrier is accordingly not a sharp mathematical divide, but rather a fuzzy concept. We also calculate the limiting forms of various thermodynamical quantities, including the rate of entropy production, for a dark energy fluid near the future Big Rip singularity. View Full-Text
Keywords: cosmology; viscous cosmology; dark energy cosmology; viscous cosmology; dark energy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Brevik, I. Viscosity-Induced Crossing of the Phantom Barrier. Entropy 2015, 17, 6318-6328.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top