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arXiv math-ph/0206027math-phmath.DSmath.MPmath.RAphysics.class-ph
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阻尼振子的哈密顿量和线性空间结构:II。临界点

Hamiltonian and Linear-Space Structure for Damped Oscillators: II. Critical Points

S. C. Chee, Alec Maassen van den Brink, K. Young

摘要:

本文将阻尼线性振子系统的本征向量展开式推广到临界点,在临界点本征向量合并,时间演化算子$H$呈现Jordan块结构。在此基础上得到了双线性映射的表示。围绕$M$阶临界点的扰动$εΔH$一般导致本征值移位$\simε^{1/M}$仅依赖于一个矩阵元素,其中$M$本征值在复平面中沿等角方向分裂。接近临界状态的小中子被证明是相互抵消的。

英文摘要:

The eigenvector expansion developed in the preceding paper for a system of damped linear oscillators is extended to critical points, where eigenvectors merge and the time-evolution operator $H$ assumes a Jordan-block structure. The representation of the bilinear map is obtained in this basis. Perturbations $εΔH$ around an $M$-th order critical point generically lead to eigenvalue shifts $\simε^{1/M}$ dependent on only_one_ matrix element, with the $M$ eigenvalues splitting in equiangular directions in the complex plane. Small denominators near criticality are shown to cancel.

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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