title: Thermal response of nonequilibrium RC circuits.
abstract: We analyze experimental data obtained from an electrical circuit having components at different temperatures, showing how to predict its response to temperature variations. This illustrates in detail how to utilize a recent linear response theory for nonequilibrium overdamped stochastic systems. To validate these results, we introduce a reweighting procedure that mimics the actual realization of the perturbation and allows extracting the susceptibility of the system from steady-state data. This procedure is closely related to other fluctuation-response relations based on the knowledge of the steady-state probability distribution. As an example, we show that the nonequilibrium heat capacity in general does not correspond to the correlation between the energy of the system and the heat flowing into it. Rather, also nondissipative aspects are relevant in the nonequilibrium fluctuation-response relations.
authors.affiliation: Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy.|INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Baiesi
authors.affiliation: Laboratoire de Physique de Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon, France.
authors.forename: Sergio
authors.initials: S
authors.lastname: Ciliberto
authors.affiliation: Max Planck Institute for Mathematics in the Sciences, Inselstr. 22, 04103 Leipzig, Germany.|Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
authors.forename: Gianmaria
authors.initials: G
authors.lastname: Falasco
authors.affiliation: Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy.
authors.forename: Cem
authors.initials: C
authors.lastname: Yolcu