Fig. 1. (Color online) The $P-r_+$ diagram of RN-AdS black hole for $d=4$ and $Q=0.1$. The temperatures of the isotherms increase from bottom to top. The upper dotted (black) lines correspond to the ideal gas, we have one phase for $T > Tc$ and the critical isotherm $T = Tc=0.44$ is denoted by the dashed (red) line. The lower (blue) solid lines correspond to temperatures smaller than the critical one $T <Tc$.
|