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arXiv 1903.03434gr-qccond-mat.stat-mechhep-th
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研究黑洞极值相变的一般框架

A general framework to study the extremal phase transition of black holes

Krishnakanta Bhattacharya, Sumit Dey, Bibhas Ranjan Majhi, Saurav Samanta

摘要:

我们研究了黑洞极值相变某些特征的普适性,统一了不同时空中的各种研究方法。不同于其他现有的方法,其中的信息的时空和它的尺寸是直接用来得到各种结果,我们提供了一个一般的配方,在任何任意黑洞时空具有极值极限,这些结果。计算了一些热力学量的涨落二阶矩,结果表明,相变只发生在微正则系综中。在不考虑任何特定黑洞的情况下,我们计算了这类相变的临界指数。这些被证明是在协议与先前获得的度量指定的情况下的值。最后,我们扩展我们的分析的几何热力学(以下简称GTD)制定。我们证明了对于任何黑洞,如果存在极值点,Ruppeiner度规的Ricci标量在该点处一定发散。

英文摘要:

We investigate the universality of some features for the extremal phase transition of black holes and unify all the approaches which have been applied in different spacetimes. Unlike the other existing approaches where the information of the spacetime and its dimension is directly used to get various results, we provide a general formulation in which those results are obtained for any arbitrary black hole spacetime having an extremal limit. Calculating the second order moments of fluctuations of some thermodynamic quantities we show that, the phase transition occurs only in the microcanonical ensemble. Without considering any specific black hole we calculate the values of critical exponents for this type of phase transition. These are shown to be in agreement with the values obtained earlier for metric specified cases. Finally we extend our analysis to the geometrothermodynamics (henceforth GTD) formulation. We show that for any black hole, if there is an extremal point, the Ricci scalar for the Ruppeiner metric must diverge at that point.

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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