Black hole entropy in scalar-tensor and f(R) gravity: an overview

Abstract

A short overview of black hole entropy in alternative gravitational theories is presented. Motivated by the recent attempts to explain the cosmic acceleration without dark energy, we focus on metric and Palatini f(R) gravity and on scalar-tensor theories.Comment: 24 pages, latex, to appear in "Entropy in Quantum Gravity", special issue of Entropy, R. Garattini editor