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arXiv 1606.04846gr-qc
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在视视界上具有Hawking温度和流体的Unruh温度的宇宙热力学:一些有趣的结果

Cosmological thermodynamics with Hawking temperature on the apparent horizon and Unruh temperature of the fluid: Some interesting consequences

Subhajit Saha

摘要:

研究了平坦Friedmann-Lemaitre-Robertson-Walker度规宇宙学视视界上的热力学,视界上的Bekenstein熵和Hawking温度,视界内流体的Unruh温度.这个温度是经历了一个径向随动观测无限接近地平线由于压力所施加的流体边界的地平线。流体的熵的表达式已被发现是成比例的热力学系统的体积,这意味着流体的Unruh温度是不符合全息原理。此外,我们已经能够找到系统的有效熵的表达式。最后,假设正压状态方程$p=wρ$($w$常数)的流体,它已被证明,广义第二定律持有良好的非幻影w,而热力学平衡是永远不可能的,这样的情况。

英文摘要:

Thermodynamics on the cosmological apparent horizon of a flat Friedmann-Lemaitre-Robertson-Walker metric has been investigated with Bekenstein entropy and Hawking temperature on the horizon, and Unruh temperature for the fluid inside the horizon. This temperature is experienced by a radial comoving observer infinitesimally close to the horizon due to the pressure exerted by the fluid bounded by the horizon. An expression for the entropy of the fluid has been obtained which is found to be proportional to the volume of the thermodynamic system which implies that the Unruh temperature of the fluid is inconsistent with the holographic principle. Further, we have been able to find an expression for the effective entropy of the system. Finally, assuming a barotropic equation of state $p=wρ$ ($w$ constant) for the fluid, it has been shown that the generalized second law holds good for a non-phantom w, while thermodynamic equilibrium is never possible for such a scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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