Generalized Lyapunov exponents of the random harmonic oscillator: cumulant expansion approach

Details Generalized Lyapunov exponents of the random harmonic oscillator: cumulant expansion approach Generalized Lyapunov exponents of the random harmonic oscillator: cumulant expansion approach

2011-11-24

arxiv.org/abs/1111.5831v1

Physics

Condensed Matter

Statistical Mechanics

arXiv admin note: substantial text overlap with arXiv:1008.4708

Scientific paper

The cumulant expansion is used to estimate generalized Lyapunov exponents of the random-frequency harmonic oscillator. Three stochastic processes are considered: Gaussian white noise, Ornstein-Uhlenbeck, and Poisson shot noise. In some cases, nontrivial numerical difficulties arise. These are mostly solved by implementing an appropriate importance-sampling Montecarlo scheme. We analyze the relation between random-frequency oscillators and many-particle systems with pairwise interactions like the Lennard-Jones gas.

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