Large-time behavior of non-symmetric Fokker-Planck type equations
Author(s) -
Anton Arnold,
Eric A. Carlen,
Qiangchang Ju
Publication year - 2008
Publication title -
communications on stochastic analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.224
H-Index - 10
eISSN - 2688-6669
pISSN - 0973-9599
DOI - 10.31390/cosa.2.1.11
Subject(s) - fokker–planck equation , logarithm , mathematics , skew , type (biology) , constant (computer programming) , entropy (arrow of time) , operator (biology) , steady state (chemistry) , mathematical analysis , sobolev inequality , planck , sobolev space , statistical physics , physics , quantum mechanics , differential equation , computer science , ecology , biochemistry , chemistry , repressor , astronomy , transcription factor , gene , biology , programming language
Large time asymptotics of the solutions to non-symmetric Fokker- Planck type equations are studied by extending the entropy method to this case. We present a modified Bakry-Emery criterion that yields covergence of the solution to the steady state in relative entropy with an explicit exponen- tial rate. In parallel it also implies a logarithmic Sobolev inequality w.r.t. the steady state measure. Explicit examples illustrate that skew-symmetric per- turbations in the Fokker Planck operator can "help" to improve the constant in such a logarithmic Sobolev inequality.
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