Abstract
Then-variable Fokker-Planck equation can be written in an equivalent form as a system ofn + 1 first-order equations by introducing as auxiliary variables the components of the drift velocityR l. The stationary state defines a stationaryR uniquely, which allows an intrinsic classification of the stationary states in terms of the properties ofR, without reference to detailed balance. This representation is very appropriate for the study of questions such as the existence of stationary states and their small and large noise asymptotics, as well as for the construction of models having some specified behavior.R provides also a classification of the dynamics, which corresponds to the hermiticity properties of the associated eigenvalue problem.
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Jauslin, H.R. A classification of Fokker-Planck models and the small and large noise asymptotics. J Stat Phys 40, 147–165 (1985). https://doi.org/10.1007/BF01010530
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DOI: https://doi.org/10.1007/BF01010530