Sanved Kolekar, T. Padmanabhan, Sudipta Sarkar
We study the physical process version of first law of black hole
thermodynamics within the context of Lanczos-Lovelock gravity. We show that the
Wald entropy of the stationary black holes in Lanczos-Lovelock gravity can
never decrease for quasi-stationary processes in which the horizon is perturbed
by the accretion of positive energy matter. This result reinforces the physical
interpretation of Wald entropy for Lanczos-Lovelock models and takes a step
towards proving the analogue of the black hole area increase-theorem in a wider
class of gravitational theories.
View original:
http://arxiv.org/abs/1201.2947
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