Fluctuation Properties of Steady-State Langevin Systems

Abstract

Motivated by stochastic models of climate phenomena, the steady-state of a linear stochastic model with additive Gaussian white noise is studied. Fluctuation theorems for nonequilibrium steady-states provide a constraint on the character of these fluctuations. The properties of the fluctuations which are unconstrained by the fluctuation theorem are investigated and related to the model parameters. The irreversibility of trajectory segments, which satisfies a fluctuation theorem, is used as a measure of nonequilibrium fluctuations. The moments of the irreversibility probability density function (pdf) are found and the pdf is seen to be non-Gaussian. The average irreversibility goes to zero for short and long trajectory segments and has a maximum for some finite segment length, which defines a characteristic timescale of the fluctuations. The initial average irreversibility growth rate is equal to the average entropy production and is related to noise-amplification. For systems with a separation of deterministic timescales, modes with timescales much shorter than the trajectory timespan and whose noise amplitudes are not asymptotically large, do not, to first order, contribute to the irreversibility statistics, providing a potential basis for dimensional reduction.

8 pages, to be published in Physical Review E

References in corpus (7)

• Entropy production along a stochastic trajectory and an integral fluctuation theorem
• Thermodynamics of a Colloidal Particle in a Time-Dependent Non-Harmonic Potential
• Path-integral analysis of fluctuation theorems for general Langevin processes
• The Fluctuation Theorem for Stochastic Systems
• On the work distribution for the adiabatic compression of a dilute classical gas
• Work and heat fluctuations in two-state systems: a trajectory thermodynamics formalism
• Test of the fluctuation theorem for stochastic entropy production in a nonequilibrium steady state

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