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arXiv 2402.12903math.AP
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大频率下半线性薛定谔方程反问题:基于流形上多项式预解估计

Inverse problems for semilinear Schrödinger equations at large frequency via polynomial resolvent estimates on manifolds

Katya Krupchyk, Shiqi Ma, Suman Kumar Sahoo, Mikko Salo, Simon St-Amant

AI总结:

本文在大固定频率下研究一般紧致黎曼流形上半线性薛定谔方程的反边界问题,利用多项式预解估计、Gaussian beam拟模和驻相引理证明三次非线性项可由Dirichlet-to-Neumann映射唯一确定,无需乘积结构或测地射线变换单射性。

摘要:

我们研究维度不小于2、具有光滑边界的光滑紧致黎曼流形上,半线性薛定谔方程在大固定频率下的反边界问题。我们证明,在相当一般的黎曼流形上,仅通过大固定频率下的非线性 Dirichlet-to-Neumann 映射的知识,就可以唯一确定某些类别的三次非线性项。特别地,与已有结果相比,这里的流形不需要满足任何乘积结构,可以存在被困测地线,并且测地射线变换不必是单射。只需要一个关于相交测地线几何的温和假设。我们还建立了任意无边界光滑紧致黎曼流形上 Laplace 算子的多项式预解估计,该估计对大多数频率成立。这一估计,连同具有一致常数界的 Gaussian beam 拟模的不变构造,以及一个对所有涉及常数具有显式控制的驻相引理,构成了证明所考虑反问题唯一性结果的关键要素。

英文摘要:

We study inverse boundary problems for semilinear Schrödinger equations on smooth compact Riemannian manifolds of dimensions $\ge 2$ with smooth boundary, at a large fixed frequency. We show that certain classes of cubic nonlinearities are determined uniquely from the knowledge of the nonlinear Dirichlet--to--Neumann map at a large fixed frequency on quite general Riemannian manifolds. In particular, in contrast to the previous results available, here the manifolds need not satisfy any product structure, may have trapped geodesics, and the geodesic ray transform need not be injective. Only a mild assumption about the geometry of intersecting geodesics is required. We also establish a polynomial resolvent estimate for the Laplacian on an arbitrary smooth compact Riemannian manifold without boundary, valid for most frequencies. This estimate, along with the invariant construction of Gaussian beam quasimodes with uniform bounds for underlying constants and a stationary phase lemma with explicit control over all involved constants, constitutes the key elements in proving the uniqueness results for the considered inverse problems.

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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