Thermodynamic Geometry of Black Holes Enclosed by a Cavity in Extended Phase Space

Abstract

Recently, the phase space of black holes in a spherical cavity of radius rB has been extended by introducing a thermodynamic volume V ≡ 4πr 3 B /3. In the extended phase space, we consider the thermodynamic geometry, which provides a powerful tool to understand the microscopic structure of black holes, of Reissner-Nordström (RN) black holes in a cavity, as well as that of Reissner-Nordström-AdS black holes. Although the phase structures of the cavity and AdS cases show striking resemblance, we find that there exist significant differences between the thermodynamic geometries of these two cases. In particular, a reentrant transition of the type of the microstructure interactions, i.e., repulsive → attractive → repulsive with increasing temperature in an isobaric process, is observed for RN black holes in a cavity.

Quantum corrections to the thermodynamics and phase transition of a black hole surrounded by a cavity in the extended phase space

“…In Refs. [38][39][40], they extended the phase space of SC, R-N and Gauss-Bonnet black holes in the cavity, and then investigated the thermodynamic properties and P −V criticality of those black holes. The results showed that the black hole systems have Hawking-Pagelike phase transition.…”