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arXiv 0902.0921math.SPmath-phmath.MP
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一类非自伴薛定谔算子的特征值个数

Number of eigenvalues for a class of non-selfadjoint Schrödinger operators

Xue Ping Wang

摘要:

本文证明了一类具有$\bR^n$上的复值位势的Schr dinger算子$H = -Δ+ V(x)$,$n \ge 2$的特征值个数的有限性.如果$\Im V$是足够小的,$\Im V \le 0$和$\Im V \neq 0$,我们表明,$N(V) = N(\Re V)+ k$,其中$k$是多重性的零共振的自伴运营商$-Δ+ \Re V$和$N(W)$的本征值的数目$-Δ+ W$,根据其代数多重性计数。

英文摘要:

In this article, we prove the finiteness of the number of eigenvalues for a class of Schrödinger operators $H = -Δ+ V(x)$ with a complex-valued potential $V(x)$ on $\bR^n$, $n \ge 2$. If $\Im V$ is sufficiently small, $\Im V \le 0$ and $\Im V \neq 0$, we show that $N(V) = N(\Re V)+ k$, where $k$ is the multiplicity of the zero resonance of the selfadjoint operator $-Δ+ \Re V$ and $N(W)$ the number of eigenvalues of $-Δ+ W$, counted according to their algebraic multiplicity.

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