Zhang, YP , Beijing Normal Univ, Dept Phys, Inst Theoret Phys, Beijing 100875, Peoples R China
部门归属:
[Zhang, YP; Liu, WB] Beijing Normal Univ, Dept Phys, Inst Theoret Phys, Beijing 100875, Peoples R China; [Yi, ZL; Zhang, TJ] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Zhang, TJ] Chinese Acad Sci, Inst Theoret Phys, KITPC, Beijing 100080, Peoples R China
英文摘要:
The thermodynamical properties of dark energy are usually investigated with the equation of state omega = omega(0) + omega(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.
Zhang, Yongping,Yi, Zelong,Zhang, Tong-Jie,et al. Thermodynamical properties of dark energy with the equation of state omega=omega(0)+omega(1)z[J]. PHYSICAL REVIEW D,2008,77(2):-.
