Free transport-entropy inequalities for non-convex potentials and application to concentration for random matrices |
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Authors: | Mylène Maïda Édouard Maurel-Segala |
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Affiliation: | 1. Laboratoire de Mathématiques, Université Paris Sud 11, Bat. 425, 91405, Orsay Cedex, France
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Abstract: | Talagrand’s inequalities provide a link between two fundamentals concepts of probability: transportation and entropy. The study of the counterpart of these inequalities in the context of free probability has been initiated by Biane and Voiculescu and later extended by Hiai, Petz and Ueda for convex potentials. In this work, we prove a free analogue of a result of Bobkov and Götze in the classical setting, thus providing free transport-entropy inequalities for a very natural class of measures appearing in random matrix theory. These inequalities are weaker than the ones of Hiai, Petz and Ueda but still hold beyond the convex case. We then use this result to get a concentration estimate for $beta $ -ensembles under mild assumptions on the potential. |
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