用状态方程$% ω=ω_{0}+ω_{1}z$研究暗能量的热力学性质
Thermodynamical properties of dark energy with the equation of state $% ω=ω_{0}+ω_{1}z$
摘要：
暗能量的物理性质通常用状态方程$ω=ω_{0}+ω_{1}z$来研究。最近的观测表明，我们的宇宙是在加速的，视视界和事件视界随红移$z$而变化。将黑洞的温度和熵的定义应用于宇宙的两个视界，考察了分别被视视界和事件视界包围的宇宙的热力学性质。我们证明了在任意红移下，热力学第一和第二热力学定律在视视界内都是满足的，而在某些红移下，它们在事件视界内被破坏。因此，宇宙的视视界可能是宇宙的热力学平衡边界，就像黑洞的事件视界一样。
英文摘要：
The 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.
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