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arXiv 2007.11326math-phmath.MP
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广义四次非谐振子的多项式解

Polynomial Solutions of Generalized Quartic Anharmonic Oscillators

William H. Klink, Wolfgang Schweiger

AI总结:

本文利用四次幂零群生成元将广义对称四次振子代数化,在势参数约束下构造多项式本征解,扩展了拟精确可解四次振子类别并联系非恒定电磁场中的带电粒子问题。

摘要:

本文研究广义对称四次振子能量本征值问题的部分求解。该问题的代数化是通过用一个幂零群(我们称之为四次群)的生成元表示薛定谔算符来实现的。于是可以看到,能量本征值依赖于该群两个 Casimir 算符的取值。这种依赖表现出一种标度律,而该标度律来自群生成元的标度性质。要求势在某个特定李代数元素下产生多项式解,会对四个势参数施加约束,使其中只有两个保持自由。对于满足这些约束的势,至少一个能量本征值及相应本征函数能够以纯代数方式得到封闭解析形式。通过我们的方法,我们扩展了文献中借助更常见的 sl(2,R) 代数化所获得的拟精确可解四次振子类别。最后,我们展示广义四次振子问题的解如何产生带电粒子在特定非恒定电磁场中运动的解。

英文摘要:

This paper deals with the partial solution of the energy eigenvalue problem for generalized symmetric quartic oscillators. Algebraization of the problem is achieved by expressing the Schroedinger operator in terms of the generators of a nilpotent group, which we call the quartic group. Energy eigenvalues are then seen to depend on the values of the two Casimir operators of the group. This dependence exhibits a scaling law which follows from the scaling properties of the group generators. Demanding that the potential gives rise to polynomial solutions in a particular Lie algebra element puts constraints on the four potential parameters, leaving only two of them free. For potentials satisfying such constraints at least one of the energy eigenvalues and the corresponding eigenfunctions can be obtained in closed analytic form {by pure algebraic means. With our approach we extend the class of quasi-exactly solvable quartic oscillators which have been obtained in the literature by means of the more common sl(2,R) algebraization. Finally we show, how solutions of the generalized quartic oscillator problem give rise to solutions for a charged particle moving in particular non-constant electromagnetic fields.

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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