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arXiv math-ph/0511032math-phmath.MP
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Dirichlet Schroedinger算子的第二特征值界

A second eigenvalue bound for the Dirichlet Schroedinger operator

Rafael D. Benguria, Helmut Linde

摘要:

设$λ_i(Ω,V)$是有界区域$Ω\subset \R^n$上具有Dirichlet边界条件的薛定谔算子的$i$阶本征值,其位势为正的$V$ .遵循Payne-Pólya-Weinberger猜想的精神,在球重排势$V_\star$的一些凸性假设下,我们证明了$λ_2(Ω,V) \le λ_2(S_1,V_\star)$ .这里$S_1$表示以原点为中心的球,它满足条件$λ_1(Ω,V) = λ_1(S_1,V_\star)$。进一步证明了在球对称势$V$的相同凸性假设下,当球$B_R$的半径$R$增大时,$λ_2(B_R, V) / λ_1(B_R, V)$减小.我们的结论与几个结果的拉普拉斯算子的前两个特征值相对于高斯或倒高斯密度的措施。

英文摘要:

Let $λ_i(Ω,V)$ be the $i$th eigenvalue of the Schrödinger operator with Dirichlet boundary conditions on a bounded domain $Ω\subset \R^n$ and with the positive potential $V$. Following the spirit of the Payne-Pólya-Weinberger conjecture and under some convexity assumptions on the spherically rearranged potential $V_\star$, we prove that $λ_2(Ω,V) \le λ_2(S_1,V_\star)$. Here $S_1$ denotes the ball, centered at the origin, that satisfies the condition $λ_1(Ω,V) = λ_1(S_1,V_\star)$. Further we prove under the same convexity assumptions on a spherically symmetric potential $V$, that $λ_2(B_R, V) / λ_1(B_R, V)$ decreases when the radius $R$ of the ball $B_R$ increases. We conclude with several results about the first two eigenvalues of the Laplace operator with respect to a measure of Gaussian or inverted Gaussian density.

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