“…Since the pioneering work by Sinai [47] on dispersing billiards, the dynamical structures and stochastic properties have been extensively studied for chaotic billiards [31,6,7,8,10,11,41,54,18,19,12,1,17,13,20,2,53], and also for abstract hyperbolic systems with or without singularities [48,42,37,43,46,57,58,49,24,14,21,25,26,27]. Among all the physical measures, the SRB measures -named after Sinai [48], Ruelle [45] and Bowen [4,5] -are shown to display several levels of ergodic properties, including the decay rate of correlations, the large deviation principles and the central limit theorem, etc.…”