Thermodynamics of an accelerated expanding universe

被引：253

作者：

Wang, Bin ^{[1
]}

Gong, Yungui

Abdalla, Elcio

机构：

[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[2] Chongqing Univ Posts & Telecommun, Inst Modern Phys, Chongqing 400065, Peoples R China

[3] Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China

[4] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW D | 2006年 / 74卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.74.083520

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the laws of thermodynamics in an accelerating universe driven by dark energy with a time-dependent equation of state. In the case we consider that the physically relevant part of the Universe is that enveloped by the dynamical apparent horizon, we have shown that both the first law and second law of thermodynamics are satisfied. On the other hand, if the boundary of the Universe is considered to be the cosmological event horizon the thermodynamical description based on the definitions of boundary entropy and temperature breaks down. No parameter redefinition can rescue the thermodynamics laws from such a fate, rendering the cosmological event horizon unphysical from the point of view of the laws of thermodynamics.

引用

页数：7

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