A fluctuation relation for weakly ergodic aging systems

Abstract

A fluctuation relation for aging systems is introduced, and verified by extensive numerical simulations. It is based on the hypothesis of partial equilibration over phase space regions in a scenario of entropy-driven relaxation. The relation provides a simple alternative method, amenable of experimental implementation, to measure replica symmetry breaking parameters in aging systems. The connection with the effective temperatures obtained from the fluctuation-dissipation theorem is discussed.

5 pages, 3 figures, Phys Rev Lett (in press)

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• Nonequilibrium thermodynamic potentials for continuous-time Markov chains
• A general fluctuation-response relation for noise variations and its application to driven hydrodynamic experiments
• Energy and Heat Fluctuations in a Temperature Quench
• Derivation of the spin-glass order parameter from stochastic thermodynamics