Thermodynamical properties of dark energy with the equation of state $% ω=ω_{0}+ω_{1}z$

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dc.creatorZhang, Yongping
dc.creatorYi, Ze-Long
dc.creatorZhang, Tong-Jie
dc.creatorLiu, Wenbiao
dc.date2007-09-18
dc.date2007-10-30
dc.date.accessioned2026-07-07T11:19:23Z
dc.date.available2026-07-07T11:19:23Z
dc.descriptionThe thermodynamical properties of dark energy are usually investigated with the equation of state $ω=ω_{0}+ω_{1}z$. Recent observations show that our universe is accelerating, and the apparent horizon and the event horizon vary with redshift $z$. When definitions of the temperature and entropy of a black hole are used to the two horizons of the universe, we examine the thermodynamical properties of the universe which is enveloped by the apparent horizon and the event horizon respectively. We show that the first and the second laws of thermodynamics inside the apparent horizon in any redshift are satisfied, while they are broken down inside the event horizon in some redshift. Therefore, the apparent horizon for the universe may be the boundary of thermodynamical equilibrium for the universe like the event horizon for a black hole.
dc.description6 pages, 5 figures, Accepted for publication in Physical Review D
dc.identifierhttps://arxiv.org/abs/0709.2745
dc.identifierhttp://arxiv.org/abs/0709.2745
dc.identifierPhys.Rev.D77:023502,2008
dc.identifierdoi:10.1103/PhysRevD.77.023502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193664
dc.subjectAstrophysics
dc.titleThermodynamical properties of dark energy with the equation of state $% ω=ω_{0}+ω_{1}z$
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