Abstract
Solutions of the Fokker-Planck (Kramers) equation in position-velocity space for the double-well potentiald 2x2/2+d4x4/4 in terms of matrix continued fractions are derived. It is shown that the method is also applicable to a Boltzmann equation with a BGK collision operator. Results of eigenvalues and of the Fourier transform of correlation functions are presented explicitly. The lowest nonzero eigenvalue is compared with the escape rate in the weak noise limit for various damping constants and the susceptibility is compared with the zero-friction-limit result.
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Voigtlaender, K., Risken, H. Solutions of the Fokker-Planck equation for a double-well potential in terms of matrix continued fractions. J Stat Phys 40, 397–429 (1985). https://doi.org/10.1007/BF01017181
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DOI: https://doi.org/10.1007/BF01017181