| HAL : hal-00716040, version 1 |
| arXiv : 1207.2233 |
| Fiche détaillée | Récupérer au format |
|
|
|
|
| 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 | |
|
|
|
|
|
|
|
|
| Domaine | : | 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 |
|
|
| Liste des fichiers attachés à ce document : | ||||||||||
|
|
|
| hal-00716040, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00716040 | |
| oai:hal.archives-ouvertes.fr:hal-00716040 | |
| Contributeur : Yves Elskens | |
| Soumis le : Lundi 9 Juillet 2012, 17:04:31 | |
| Dernière modification le : Mercredi 11 Juillet 2012, 11:04:24 | |