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arXiv 1605.08710math.AP
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随机势的逆散射

Inverse scattering for a random potential

Pedro Caro, Tapio Helin, Matti Lassas

摘要:

本文考虑$n$维随机薛定谔方程$(Δ-q+k^2)u = 0$的一个反问题.本文研究了存在势场$q$的平面波的散射问题。势场假定为高斯随机函数,其协方差由伪微分算子描述。我们的主要结果如下:给定由随机势$q$的单一实现得到的后向散射远场,我们唯一地确定了$q$的协方差算子的主象征。特别地,对于$n=3$,该结果是针对完全非线性逆后向散射问题获得的。最后,我们提出了一个物理标度制度的方法是有实际意义的。

英文摘要:

In this paper we consider an inverse problem for the $n$-dimensional random Schrödinger equation $(Δ-q+k^2)u = 0$. We study the scattering of plane waves in the presence of a potential $q$ which is assumed to be a Gaussian random function such that its covariance is described by a pseudodifferential operator. Our main result is as follows: given the backscattered far field, obtained from a single realization of the random potential $q$, we uniquely determine the principal symbol of the covariance operator of $q$. Especially, for $n=3$ this result is obtained for the full non-linear inverse backscattering problem. Finally, we present a physical scaling regime where the method is of practical importance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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