Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-12-30
European Physical Journal B 45, 355-368 (2005)
Physics
Condensed Matter
Statistical Mechanics
Author Information under http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir/
Scientific paper
10.1140/epjb/e2005-00195-2
We develop a recursive method for perturbative solutions of the Fokker-Planck equation with nonlinear drift. The series expansion of the time-dependent probability density in terms of powers of the coupling constant is obtained by solving a set of first-order linear ordinary differential equations. Resumming the series in the spirit of variational perturbation theory we are able to determine the probability density for all values of the coupling constant. Comparison with numerical results shows exponential convergence with increasing order.
Dreger Jens
Hamprecht Bodo
Pelster Axel
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