Modified fluctuation-dissipation theorem for non-equilibrium steady states and applications to molecular motors
Laboratoire de Physico-Chimie Théorique, UMR CNRS Gulliver 7083, ESPCI - 10 rue Vauquelin, F-75231 Paris, France, EU
2 Institut de Physique Théorique, CEA Saclay - F-91191 Gif-sur-Yvette, France, EU
Accepted: 21 December 2010
We present a theoretical framework to understand a modified fluctuation-dissipation theorem valid for systems close to non-equilibrium steady states and obeying Markovian dynamics. We discuss the interpretation of this result in terms of trajectory entropy excess. The framework is illustrated on a simple pedagogical example of a molecular motor. We also derive in this context generalized Green-Kubo relations similar to the ones obtained recently in Seifert U., Phys. Rev. Lett., 104 (2010) 138101 for more general networks of biomolecular states.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 87.16.Nn – Motor proteins (myosin, kinesin dynein)
© EPLA, 2011