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arXiv 1502.05643math.AP
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关于NLS的连续共振方程:II。统计研究

On the continuous resonant equation for NLS: II. Statistical study

Pierre Germain, Zaher Hani, Laurent Thomann

摘要:

考虑二维立方非线性Schr{<$}dinger(NLS)方程的连续共振(CR)系统.这个系统出现在许多情况下,作为一个有效的方程的长期动力学的NLS在有限的制度(例如,在一个紧凑的域或捕获潜力)。该系统是从一个确定性的观点在几个早期的作品,揭示了它的许多显着的性质推导和研究。这份手稿致力于这个系统的概率研究。最值得注意的是,我们在负索伯列夫空间中构造了全局解,使吉布斯和白噪声测度不变。不变性的白噪声措施似乎特别有趣,鉴于没有类似的结果NLS。

英文摘要:

We consider the continuous resonant (CR) system of the 2D cubic nonlinear Schr{ö}dinger (NLS) equation. This system arises in numerous instances as an effective equation for the long-time dynamics of NLS in confined regimes (e.g. on a compact domain or with a trapping potential). The system was derived and studied from a deterministic viewpoint in several earlier works, which uncovered many of its striking properties. This manuscript is devoted to a probabilistic study of this system. Most notably, we construct global solutions in negative Sobolev spaces, which leave Gibbs and white noise measures invariant. Invariance of white noise measure seems particularly interesting in view of the absence of similar results for NLS.

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