2003/04/02 by Jan Aman, Ingemar Bengtsson, Narit Pidokrajt
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1023/a:1026058111582
published as Gen.Rel.Grav.35:1733,2003 · 13 pages, 2 figures
arxiv created 2003/04/02 · arxiv updated 2009/11/30
The Hessian of the entropy function can be thought of as a metric tensor on the state space. In the context of thermodynamical fluctuation theory Ruppeiner has argued that the Riemannian geometry of this metric gives insight into the underlying statistical mechanical system; the claim is supported by numerous examples. We study this geometry for some families of black holes. It is flat for the BTZ and Reissner-Nordstrom black holes, while curvature singularities occur for the Reissner-Nordstrom-anti-de Sitter and Kerr black holes.