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arXiv 1202.0050math.AP
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二维Schr dinger算子的加权色散估计

A weighted dispersive estimate for Schrödinger operators in dimension two

M. Burak Erdoğan, William R. Green

摘要:

设$H=-Δ+V$,其中$V$是$\R^2$上满足$|V(x)|\les \la x\ra^{-3-}$的实值位势.证明了如果零是$H=-Δ+V$谱的正则点,则$$ \|w^{-1} e^{itH}P_{ac}f\|_{L^\infty(\R^2)}\les \f1{|t|\log^2(|t|)} \|w f\|_{L^1(\R^2)}, |t| >2, $$有$w(x)=\log^2(2+|x|)$ .这个衰减率是由村田在加权$L^2$空间的多项式增长的权重设置。

英文摘要:

Let $H=-Δ+V$, where $V$ is a real valued potential on $\R^2$ satisfying $|V(x)|\les \la x\ra^{-3-}$. We prove that if zero is a regular point of the spectrum of $H=-Δ+V$, then $$ \|w^{-1} e^{itH}P_{ac}f\|_{L^\infty(\R^2)}\les \f1{|t|\log^2(|t|)} \|w f\|_{L^1(\R^2)}, |t| >2, $$ with $w(x)=\log^2(2+|x|)$. This decay rate was obtained by Murata in the setting of weighted $L^2$ spaces with polynomially growing weights.

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