arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math-ph/0501036math-phmath.MPmath.SP
收藏

两粒子离散薛定谔算子本征值个数的估计

Estimates on the number of eigenvalues of two-particle discrete Schrödinger operators

Sergio Albeverio, Saidakhmat N. Lakaev, Janikul I. Abdullaev

摘要:

考虑三维晶格上的两粒子离散薛定谔算符$H(k)=H_{0}(k)-V$ $\Z^3,$ $k$是两粒子准动量。通过势算符$V$的本征值个数大于$H_{0}(k)$的带宽,得到了位于$H_{0}(k)$的带外的本征值个数的估计.证明了准动量$k\in \T^3\equiv (-π,π]^3$的非平凡值在$H_{0}(k)$带下存在非负本征值,条件是算子H(0)具有零能量共振或零本征值.证明了如果$k\in \T^3$的一个坐标$k^{(j)},j=1,2,3,$是$π.$,则算子$H(k), k\in \T^3,$有无穷多个特征值从下向上累积到带底

英文摘要:

Two-particle discrete Schrödinger operators $H(k)=H_{0}(k)-V$ on the three-dimensional lattice $\Z^3,$ $k$ being the two-particle quasi-momentum, are considered. An estimate for the number of the eigenvalues lying outside of the band of $H_{0}(k)$ via the number of eigenvalues of the potential operator $V$ bigger than the width of the band of $H_{0}(k)$ is obtained. The existence of non negative eigenvalues below the band of $H_{0}(k)$ is proven for nontrivial values of the quasi-momentum $k\in \T^3\equiv (-π,π]^3$, provided that the operator H(0) has either a zero energy resonance or a zero eigenvalue. It is shown that the operator $H(k), k\in \T^3,$ has infinitely many eigenvalues accumulating at the bottom of the band from below if one of the coordinates $k^{(j)},j=1,2,3,$ of $k\in \T^3$ is $π.$

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。

↑