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arXiv 1502.05967math-phmath.APmath.MP
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周期导数非线性薛定谔方程运动积分的Gibbs测度

Gibbs measures associated to the integrals of motion of the periodic derivative nonlinear Schrödinger equation

Giuseppe Genovese, Renato Lucà, Daniele Valeri

摘要:

研究了一维周期导数非线性薛定谔(DNLS)方程。已知这是一个完全可积系统,在这个意义上,有一个无穷序列的形式积分的运动$\int h_k$,$k\in \mathbb{Z}_{+}$。在每个$\int h_{2k}$中,具有最高正则性的项涉及DNLS方程的解的Sobolev范数$\dot H^{k}(\mathbb{T})$。我们证明了$L^2(\mathbb{T})$上的一个函数测度,绝对连续w.r.t.具有协方差高斯测量值$(\mathbb{I}+(-Δ)^{k})^{-1}$与运动的每个积分$\int h_{2k}$、$k\geq1$相关联。

英文摘要:

We study the one dimensional periodic derivative nonlinear Schrödinger (DNLS) equation. This is known to be a completely integrable system, in the sense that there is an infinite sequence of formal integrals of motion $\int h_k$, $k\in \mathbb{Z}_{+}$. In each $\int h_{2k}$ the term with the highest regularity involves the Sobolev norm $\dot H^{k}(\mathbb{T})$ of the solution of the DNLS equation. We show that a functional measure on $L^2(\mathbb{T})$, absolutely continuous w.r.t. the Gaussian measure with covariance $(\mathbb{I}+(-Δ)^{k})^{-1}$, is associated to each integral of motion $\int h_{2k}$, $k\geq1$.

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