Inertia ratchets: A numerical study versus theory
作者： B. Lindner , L. Schimansky-Geier , P. Reimann , P. Hänggi , M. Nagaoka
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摘要: The colored ~Ornstein-Uhlenbeck! noise-driven nonequilibrium dynamics of massive damped Brownian particles in a periodic but asymmetric potential ~ratchet! is investigated. Our special focus on the influence inertia particle for noise induced, directed current. By means two approximation schemes ~a unified and path-integral approach! by numerical matrixcontinued-fraction evaluations inherent, three-dimensional Fokker-Planck as well direct simulations stochastic differential equations we examine at various inertial strengths. For case large mass find current reversal with respect to both variation noise-correlation time. Possibilities efficient mass-sensitive scenarios separation are discussed. @S1063-651X~99!00802-8#
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