“…The past decade has brought new insights into nonequilibrium statistical mechanics due to the discovery of various types of fluctuation relations valid arbitrarily far from equilibrium [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. These relations identify, at the level of the single realization of a statistical ensemble, the "trajectory entropy" which upon ensemble averaging reproduce the thermodynamic entropy.…”