Geometrothermodynamics of 3D Regular Black Holes

被引：3

作者：

Beissen, Nurzada ^{[1
]}

机构：

[1] Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan

来源：

ENTROPY | 2024年 / 26卷 / 06期

关键词：

geometrothermodynamics; black hole; equilibrium thermodynamics; GENERAL-RELATIVITY; SIGNALS; LIGO;

D O I：

10.3390/e26060457

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate a spherically symmetric exact solution of Einstein's gravity with cosmological constant in (2 + 1) dimensions, non-minimally coupled to a scalar field. The solution describes the gravitational field of a black hole, which is free of curvature singularities in the entire spacetime. We use the formalism of geometrothermodynamics to investigate the geometric properties of the corresponding space of equilibrium states and find their interpretation from the point of view of thermodynamics. It turns out that, as a result of the presence of thermodynamic interaction, the space of equilibrium states is curved with two possible configurations, which depend on the value of a coupling constant. In the first case, the equilibrium space is completely regular, corresponding to a stable thermodynamic system. The second case is characterized by the presence of two curvature singularities, which are shown to correspond to locations where the system undergoes two different phase transitions, one due to the breakdown of the thermodynamic stability condition and the second one due to the presence of a divergence at the level of the response functions.

引用

页数：12

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