title: Fluctuation-response theorem for the active noisy oscillator of the hair-cell bundle.
abstract: The hair bundle of sensory cells in the vertebrate ear provides an example of a noisy oscillator close to a Hopf bifurcation. The analysis of the data from both spontaneous and forced oscillations shows a strong violation of the fluctuation-dissipation theorem, revealing the presence of an underlying active process that keeps the system out of equilibrium. Nevertheless, we show that a generalized fluctuation-dissipation theorem, valid for nonequilibrium steady states, is fulfilled within the limits of our experimental accuracy and computational approximations, when the adequate conjugate degrees of freedom are chosen.
authors.affiliation: Laboratoire Physico-Chimie Curie, CNRS, Institut Curie, UPMC, 26 rue d'Ulm, F-75248 Paris Cedex 05, France.
authors.forename: L
authors.initials: L
authors.lastname: Dinis
authors.forename: P
authors.initials: P
authors.lastname: Martin
authors.forename: J
authors.initials: J
authors.lastname: Barral
authors.forename: J
authors.initials: J
authors.lastname: Prost
authors.forename: J F
authors.initials: JF
authors.lastname: Joanny