Second Order Phase Transition and Thermodynamic Geometry in Kerr-AdS Black Hole

Abstract

We discuss a scheme based on Ehrenfest like equations to exhibit and classify transitions between two phases (with "smaller" and "larger" masses) of Kerr AdS black holes. We show that for fixed angular velocity this phase transition is of second order as both Ehrenfest's equations are satisfied. Finally we make a close connection of the results found from this analysis with those obtained from the thermodynamic state space geometry approach.

LaTex, v3: 12 pages, 3 figures; minor modifications to match the journal version; to appear in Phys. Rev. D