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Gaussian convergence for stochastic acceleration of N particles in the dense spectrum limit
Yves Elskens 1
(09/07/2012)

The velocity of a passive particle in a one-dimensional wave field is shown to converge in law to a Wiener process, in the limit of a dense wave spectrum with independent complex amplitudes, where the random phases distribution is invariant modulo $\pi/2$ and the power spectrum expectation is uniform. The proof provides a full probabilistic foundation to the quasilinear approximation in this limit. The result extends to an arbitrary number of particles, founding the use of the ensemble picture for their behaviour in a single realization of the stochastic wave field.
1 :  Physique des interactions ioniques et moléculaires (PIIM)
CNRS : UMR6633 – Université de Provence - Aix-Marseille I
Physique/Physique mathématique

Mathématiques/Physique mathématique

Science non linéaire/Dynamique Chaotique

Physique/Physique/Physique des plasmas

Mathématiques/Probabilités
quasilinear diffusion – weak plasma turbulence – propagation of chaos – wave--particle interaction – stochastic acceleration – Fokker--Planck equation – hamiltonian chaos
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