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arXiv math-ph/0208047math-phmath.MPquant-ph
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量子力学中的广义比较定理

Generalized comparison theorems in quantum mechanics

Richard L. Hall, Qutaibeh D. Katatbeh

摘要:

本文研究了N维空间中Schroedinger算子H = -Delta + V的离散谱,其中V(r)是吸引势.对于每个角动量子空间H_{ell}中H的谱的底部,报告了两个主要结果:(i)当势是V(r)= V^{(1)}(r)+ V^{(2)}(r)项之和并且H_{ell}中的-Delta + V^{(1)}(r)和-Delta + V^{(2)}(r)的谱的底部已知时的优化下限,以及(ii)一个广义比较定理,当比较势V^{(1)}(r)和V^{(2)}(r)的图以受控方式相交时,该定理预言了谱序。本文研究了纯幂律势,并详细地给出了结果在库仑加线性势V(r)= -a/r + br中的应用:对于这个问题,一个较早的能量界公式被锐化并推广到N维。

英文摘要:

This paper is concerned with the discrete spectra of Schroedinger operators H = -Delta + V, where V(r) is an attractive potential in N spatial dimensions. Two principal results are reported for the bottom of the spectrum of H in each angular-momentum subspace H_{ell}: (i) an optimized lower bound when the potential is a sum of terms V(r) = V^{(1)}(r) + V^{(2)}(r), and the bottoms of the spectra of -Delta + V^{(1)}(r) and -Delta + V^{(2)}(r) in H_{ell} are known, and (ii) a generalized comparison theorem which predicts spectral ordering when the graphs of the comparison potentials V^{(1)}(r) and V^{(2)}(r) intersect in a controlled way. Pure power-law potentials are studied and an application of the results to the Coulomb-plus-linear potential V(r) = -a/r + br is presented in detail: for this problem an earlier formula for energy bounds is sharpened and generalized to N dimensions.

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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