https://doi.org/10.1140/epjc/s10052-016-4532-8
Regular Article - Theoretical Physics
Q–
criticality in the extended phase space of 
-dimensional RN-AdS black holes
1
Department of Astronomy, Beijing Normal University, Beijing, 100875, China
2
School of Physics, Shanxi Datong University, Datong, 037009, China
* e-mail: caoshuo@bnu.edu.cn
Received:
6
July
2016
Accepted:
24
November
2016
Published online:
5
December
2016
In order to achieve a deeper understanding of gravity theories, i.e., the quantum properties of gravity theories and the statistical explanation of gravitational entropy, it is important to further investigate the thermodynamic properties of a black hole at the critical point, besides the phase transition and critical behaviors. In this paper, by using Maxwell’s equal area law, we choose 
as the state parameters and study the phase equilibrium problem of a general -dimensional RN-AdS black holes thermodynamic system. The boundary of the two-phase coexistence region and its isotherm and isopotential lines are presented, which may provide a theoretical foundation for studying the phase transition and phase structure of black hole systems.
© The Author(s), 2016
