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arXiv math-ph/0509059math-phmath.APmath.MP
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一维Schroedinger算子的波动算子的L^p有界性

L^p boundedness of the wave operator for the one dimensional Schroedinger operator

Piero D'Ancona, Luca Fanelli

摘要:

给定一个一维扰动Schroedinger算子H=-(d/dx)^2+V(x),我们考虑相关的波算子W_+,W_-,定义为算子e^{isH} e^{-isH_0}的强L^2极限s-> \pm \infty。我们证明了对所有1<p< \infty,波算子是L^p上的有界算子,条件是(1+ |x|)^2 V(x)是可积的,否则(1+ |x|)V(x)是可积的,0不是共振。对于p= \infty,我们得到一个估计的希尔伯特变换。给出了变粗糙系数方程色散估计的一些应用。

英文摘要:

Given a one dimensional perturbed Schroedinger operator H=-(d/dx)^2+V(x) we consider the associated wave operators W_+, W_- defined as the strong L^2 limits as s-> \pm\infty of the operators e^{isH} e^{-isH_0} We prove that the wave operators are bounded operators on L^p for all 1<p<\infty, provided (1+|x|)^2 V(x) is integrable, or else (1+|x|)V(x) is integrable and 0 is not a resonance. For p=\infty we obtain an estimate in terms of the Hilbert transform. Some applications to dispersive estimates for equations with variable rough coefficients are given.

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