title: Experimental accessibility of generalized fluctuation-dissipation relations for nonequilibrium steady states.
abstract: We study the fluctuation-dissipation theorem for a brownian particle driven into a nonequilibrium steady state experimentally. We validate two different theoretical variants of a generalized fluctuation-dissipation theorem. Furthermore, we demonstrate that the choice of observables crucially affects the accuracy of determining the nonequilibrium response from steady state nonequilibrium fluctuations.
authors.affiliation: 2. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
authors.forename: Jakob
authors.initials: J
authors.lastname: Mehl
authors.forename: Valentin
authors.initials: V
authors.lastname: Blickle
authors.forename: Udo
authors.initials: U
authors.lastname: Seifert
authors.forename: Clemens
authors.initials: C
authors.lastname: Bechinger