Convex Entropy Decay via the Bochner-Bakry-Emery approach

Details Convex Entropy Decay via the Bochner-Bakry-Emery approach Convex Entropy Decay via the Bochner-Bakry-Emery approach

2007-12-16

arxiv.org/abs/0712.2578v1

Mathematics

Probability

Scientific paper

We develop a method, based on a Bochner-type identity, to obtain estimates on the exponential rate of decay of the relative entropy from equilibrium of Markov processes in discrete settings. When this method applies the relative entropy decays in a convex way. The method is shown to be rather powerful when applied to a class of birth and death processes. We then consider other examples, including inhomogeneous zero-range processes and Bernoulli-Laplace models. For these two models, known results were limited to the homogeneous case, and obtained via the martingale approach, whose applicability to inhomogeneous models is still unclear.

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