Noise Prevents Collapse of Vlasov-Poisson Point Charges

作者：Delarue Francois^*; Flandoli Franco; Vincenzi Dario

来源：Communications on Pure and Applied Mathematics, 2014, 67(10): 1700-1736.

DOI：10.1002/cpa.21476

We elucidate the effect of noise on the dynamics of N point charges in a Vlasov-Poisson model with a singular bounded interaction force. A too simple noise does not affect the structure inherited from the deterministic system and, in particular, cannot prevent coalescence of point charges. Inspired by the theory of random transport of passive scalars, we identify a class of random fields generating random pulses that are chaotic enough to disorganize the structure of the deterministic system and prevent any collapse of particles. We obtain the strong unique solvability of the stochastic model for any initial configuration of distinct point charges. In the case where there are exactly two particles, we implement the %26quot;vanishing noise method%26quot; for determining the continuation of the deterministic model after collapse.

• 出版日期2014-10