Exit from a basin of attraction for stochastic weakly damped nonlinear Schrodinger equations

• 成果类型: Article
• 署名作者: Gautier, Eric
• 署名单位: Universite Paris Saclay; Institut Polytechnique de Paris; ENSAE Paris
• 刊物名称: ANNALS OF PROBABILITY
• ISSN/ISSBN: 0091-1798
• DOI: 10.1214/07-AOP344
• 发表日期: 2008
• 页码: 896-930
• 关键词: uniform large deviations; noise

摘要

We consider weakly damped nonlinear Schrodinger equations perturbed by a noise of small amplitude. The small noise is either complex and of additive type or real and of multiplicative type. It is white in time and colored in space. Zero is an asymptotically stable equilibrium point of the deterministic equations. We study the exit from a neighborhood of zero, invariant under the flow of the deterministic equation, in L-2 or in H-1. Due to noise, large fluctuations from zero occur. Thus, on a sufficiently large time scale, exit from these domains of attraction occur. A formal characterization of the small noise asymptotic of both the first exit times and the exit points is given.