Influence of the Noise Spectrum on Stochastic Acceleration

Details Influence of the Noise Spectrum on Stochastic Acceleration Influence of the Noise Spectrum on Stochastic Acceleration

2009-04-20

arxiv.org/abs/0904.2981v1

Nonlinear Sciences

Chaotic Dynamics

12 pages

Scientific paper

We use an effective Markovian description to study the long-time behaviour of a nonlinear second order Langevin equation with Gaussian noise. When dissipation is neglected, the energy of the system grows as with time a power-law with an anomalous scaling exponent that depends both on the confining potential and on the high frequency distribution of the noise. The asymptotic expression of the Probability Distribution Function in phase space is calculated analytically. The results are extended to the case where small dissipative effects are taken into account.

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