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 variables crucially affects the accuracy of determining the nonequilibrium response from steady state nonequilibrium fluctuations.

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