title: Universality of efficiency at maximum power.
abstract: We investigate the efficiency of power generation by thermochemical engines. For strong coupling between the particle and heat flows and in the presence of a left-right symmetry in the system, we demonstrate that the efficiency at maximum power displays universality up to quadratic order in the deviation from equilibrium. A maser model is presented to illustrate our argument.
authors.affiliation: Department of Chemistry and Biochemistry, and Institute for Nonlinear Science University of California, San Diego, La Jolla, California 92093-0340, USA.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Esposito
authors.forename: Katja
authors.initials: K
authors.lastname: Lindenberg
authors.forename: Christian
authors.initials: C
authors.lastname: Van den Broeck