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arXiv 1302.5665math.APmath.SP
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薛定谔算子和伪微分算子的谱逆问题

Inverse spectral problems for Schrödinger and pseudo-differential operators

Brice Camus

摘要:

从薛定谔算子$-h^2Δ+V$的半经典谱出发(在$\mathbb{R}^n$上或在黎曼流形上),有可能检测到势$V$的临界水平。通过微局部方法,人们可以用不同的不变量来表示谱统计:\begin{itemize} \item Geometry of energy surfaces (heat invariant like). \item Classical orbits (wave invariants). \item But also classical equilibria (new wave invariants). \end{itemize}任何具有零动量的$V$的临界点都是流动的平衡点,并在特征值的半经典分布中产生许多奇点。通过尖锐的谱估计,这种现象表明存在一个临界能级和包含在这个奇异性的信息允许部分重建局部形状的$V$。还提出了这种方法的几个概括。关键词:谱分析,等离子体发射光谱,微局部分析;薛定谔算子;逆谱问题。

英文摘要:

Starting from the semi-classical spectrum of Schrödinger operators $-h^2Δ+V$ (on $\mathbb{R}^n$ or on a Riemannian manifold) it is possible to detect critical levels of the potential $V$. Via micro-local methods one can express spectral statistics in terms of different invariants: \begin{itemize} \item Geometry of energy surfaces (heat invariant like). \item Classical orbits (wave invariants). \item But also classical equilibria (new wave invariants). \end{itemize} Any critical point of $V$ with zero momentum is an equilibrium of the flow and generates many singularities in the semi-classical distribution of eigenvalues. Via sharp spectral estimates, this phenomena indicates the presence of a critical energy level and the information contained in this singularity allows to reconstruct partially the local shape of $V$. Several generalizations of this approach are also proposed. Keywords : Spectral analysis, P.D.E., Micro-local analysis; Schrödinger operators; Inverse spectral problems.

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