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Non-Markovian noise. (English) Zbl 1062.82511
Summary: The properties of non-Markovian noises with exponentially correlated memory are discussed. Considered are dichotomic noise, white shot noise, Gaussian white noise, and Gaussian colored noise. The stationary correlation functions of the non-Markovian versions of these noises are given by linear combinations of two or three exponential functions (colored noises) or of the $\delta$ function and exponential function (white noises). The non-Markovian white noises are well defined only when the kernel of the non-Markovian master equation contains a nonzero admixture of a Markovian term. Approximate equations governing the probability densities for processes driven by such non-Markovian noises are derived, including non-Markovian versions of the Fokker-Planck equation and the telegrapher’s equation. As an example, it is shown how the non-Markovian nature changes the behavior of the driven linear process.

MSC:
82C31Stochastic methods in time-dependent statistical mechanics
83C35Gravitational waves
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