Thermodynamical stability for a perfect fluid

Thermodynamical stability for a perfect fluid
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完美流体的热力学稳定性

DOI:
10.1140/epjc/s10052-017-5440-2
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发表时间:
2017-05
影响因子:
4.4
通讯作者:
Jing Jiliang
Jing Jiliang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Fang Xiongjun;He Xiaokai;Jing Jiliang

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根据最大熵原理,证明了对于理想流体,引力场方程可以由总熵的极值导出,这意味着热力学关系式中含有关于引力的信息。本文利用总熵的第二变分,得到了绝热自引力理想流体系统热力学稳定性的一个判据。我们表明,爱因斯坦的引力与球对称时空,该标准是一致的动力学稳定性推导出的Eurasekhar和Wald。我们还发现,该准则可以适用于没有球对称的情况下,或一般扰动。这个结果进一步建立了热力学和引力之间的联系。
According to the maximum entropy principle, it has been proved that the gravitational field equations could be derived by the extrema of the total entropy for a perfect fluid, which implies that thermodynamic relations contain information as regards gravity. In this manuscript, we obtain a criterion for the thermodynamical stability of an adiabatic, self-gravitating perfect fluid system by the second variation of the total entropy. We show, for Einstein’s gravity with spherical symmetry spacetime, that the criterion is consistent with that for the dynamical stability derived by Chandrasekhar and Wald. We also find that the criterion could be applied to cases without spherical symmetry, or under general perturbations. The result further establishes the connection between thermodynamics and gravity.
DOI: 10.1103/physrevd.90.044013
发表时间: 2014
期刊: Physical Review D Particles and Fields
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