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arXiv 1702.06629hep-thgr-qc
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热力学体积与推广的Smarr关系

Thermodynamic Volume and the Extended Smarr Relation

Seungjoon Hyun, Jaehoon Jeong, Sang-A Park, Sang-Heon Yi

摘要:

我们继续探索引力模型的约化作用量形式中的标度变换。作为我们构造的推广,我们考虑了各种黑洞的Smarr关系的推广形式,并采用宇宙学常数作为体压,就像某些文献中关于黑洞的那样.首先,利用电荷的准定域形式,我们证明了在一般引力理论中,黑洞热力学中的体积可以定义为与体压共轭的热力学变量,使得第一定律可以一致地推广。这个所谓的热力学体积可以用度规变量和场变量显式地表达。然后,利用约化作用量公式中允许的标度变换,我们得到了包含体压和热力学体积的扩展Smarr关系。在我们的方法中,我们不诉诸于欧拉的均匀缩放的费用,同时将可能是毛茸茸的贡献没有任何困难。

英文摘要:

We continue to explore the scaling transformation in the reduced action formalism of gravity models. As an extension of our construction, we consider the extended forms of the Smarr relation for various black holes, adopting the cosmological constant as the bulk pressure as in some literatures on black holes. Firstly, by using the quasi-local formalism for charges, we show that, in a general theory of gravity, the volume in the black hole thermodynamics could be defined as the thermodynamic conjugate variable to the bulk pressure in such a way that the first law can be extended consistently. This, so called, thermodynamic volume can be expressed explicitly in terms of the metric and field variables. Then, by using the scaling transformation allowed in the reduced action formulation, we obtain the extended Smarr relation involving the bulk pressure and the thermodynamic volume. In our approach, we do not resort to Euler's homogeneous scaling of charges while incorporating the would-be hairy contribution without any difficulty.

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