Coarse Ricci curvature for continuous-time Markov processes
  The coarse Ricci curvature for Markov chains is generalized for continuous time. We show that a positive coarse Ricci curvature implies a contraction of the Markov process for the Wasserstein distance between probability measures. This leads to a spectral gap estimate in the reversible case. 
Laurent Veysseire (UMPA-ENSL)
math.PR