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arXiv · 2102.00699

Comment on "Deformed Fokker-Planck equation: inhomogeneous medium with a position-dependent mass"

Jerzy Łuczka
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Abstract

In a recent paper by B. G. da Costa {\it et al.} [Phys. Rev. E 102, 062105(2020)], the phenomenological Langevin equation and the corresponding Fokker-Planck equation for an inhomogeneous medium with a position-dependent particle mass and position-dependent damping coefficient have been studied. The aim of this comment is to present a microscopic derivation of the Langevin equation for such a system. It is not equivalent to that in the commented paper.

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Jerzy Łuczka. 2021-02-01. Comment on "Deformed Fokker-Planck equation: inhomogeneous medium with a position-dependent mass". https://doi.org/10.1103/physreve.103.036101

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