Thermodynamical properties of dark energy with the equation of state {omega}={omega}{sub 0}+{omega}{sub 1}z
- Department of Physics, Institute of Theoretical Physics, Beijing Normal University, Beijing, 100875 (China)
The thermodynamical properties of dark energy are usually investigated with the equation of state {omega}={omega}{sub 0}+{omega}{sub 1}z. Recent observations show that our Universe is accelerating, and the apparent horizon and the event horizon vary with redshift z. Because definitions of the temperature and entropy of a black hole are used to describe 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 redshifts. 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.
- OSTI ID:
- 21035790
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 2; Other Information: DOI: 10.1103/PhysRevD.77.023502; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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