$W$-entropy, super Perelman Ricci flows and $(K, m)$-Ricci solitons

TL;DR

This paper characterizes super Perelman Ricci flows and Ricci solitons using functional inequalities, introduces a new $W$-entropy with monotonicity properties, and provides probabilistic interpretations on manifolds with various Ricci conditions.

Contribution

It introduces a new $W$-entropy and characterizes $(K, inite)$-super Perelman Ricci flows and Ricci solitons through differential inequalities and functional inequalities.

Findings

Characterization of $(K, inite)$-super Perelman Ricci flows.

Introduction of a new $W$-entropy with proven monotonicity.

Probabilistic interpretation of the $W$-entropy.

Abstract

In this paper, we prove the characterization of the $(K, \infty)$-super Perelman Ricci flows by various functional inequalities and gradient estimate for the heat semigroup generated by the Witten Laplacian on manifolds equipped with time dependent metrics and potentials. As a byproduct, we derive the Hamilton type dimension free Harnack inequality on manifolds with $(K, \infty)$-super Perelman Ricci flows. Based on a new second order differential inequality on the Boltzmann-Shannon entropy for the heat equation of the Witten Laplacian, we introduce a new $W$-entropy quantity and prove its monotonicity for the heat equation of the Witten Laplacian on complete Riemannian manifolds with the $CD(K, \infty)$-condition and on compact manifolds with $(K, \infty)$-super Perelman Ricci flows. Our results characterize the $(K, \infty)$-Ricci solitons and the $(K, \infty)$-Perelman Ricci flows. We also prove a second order differential entropy inequality on $(K, m)$-super Ricci flows, which can be used to characterize the $(K, m)$-Ricci solitons and the $(K, m)$-Ricci flows. Finally, we give a probabilistic interpretation of the $W$-entropy for the heat equation of the Witten Laplacian on manifolds with the $CD(K, m)$-condition.