title: Universal theory of efficiency fluctuations.
abstract: Using the fluctuation theorem supplemented with geometric arguments, we derive universal features of the (long-time) efficiency fluctuations for thermal and isothermal machines operating under steady or periodic driving, close or far from equilibrium. In particular, the probabilities for observing the reversible efficiency and the least likely efficiency are identical to those of the same machine working under the time-reversed driving. For time-symmetric drivings, this reversible and the least probable efficiency coincide.
authors.affiliation: Complex Systems and Statistical Mechanics, University of Luxembourg, L-1511 Luxembourg, G.D. Luxembourg.
authors.forename: Gatien
authors.initials: G
authors.lastname: Verley
authors.affiliation: Hasselt University, B-3590 Diepenbeek, Belgium.
authors.forename: Tim
authors.initials: T
authors.lastname: Willaert
authors.affiliation: Hasselt University, B-3590 Diepenbeek, Belgium.
authors.forename: Christian
authors.initials: C
authors.lastname: Van den Broeck
authors.affiliation: Complex Systems and Statistical Mechanics, University of Luxembourg, L-1511 Luxembourg, G.D. Luxembourg.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Esposito