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arXiv quant-ph/0501053quant-ph
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新的拟精确可解六次多项式位势

New Quasi-Exactly Solvable Sextic Polynomial Potentials

Carl M. Bender, Maria Monou

摘要:

如果一个哈密顿量的某些能级和相应的本征函数可以精确地计算出来,并且是封闭的,则称该哈密顿量是准精确可解的。构造了一类全新的具有六次多项式势的QES哈密顿算子。这些新的哈密顿量不同于文献中的六次QES哈密顿量,因为它们的本征函数服从PT对称边界条件而不是厄米边界条件。这些新的哈密尔顿算子提出了一个新的问题,当哈密尔顿算子是厄米时不会遇到:有必要区分未破缺的PT对称的参数区域,其中所有的本征值都是实数,和破缺的PT对称的区域,其中一些本征值是复数。这两个区域之间的边界的精确位置确定数值使用外推技术和分析使用WKB分析。

英文摘要:

A Hamiltonian is said to be quasi-exactly solvable (QES) if some of the energy levels and the corresponding eigenfunctions can be calculated exactly and in closed form. An entirely new class of QES Hamiltonians having sextic polynomial potentials is constructed. These new Hamiltonians are different from the sextic QES Hamiltonians in the literature because their eigenfunctions obey PT-symmetric rather than Hermitian boundary conditions. These new Hamiltonians present a novel problem that is not encountered when the Hamiltonian is Hermitian: It is necessary to distinguish between the parametric region of unbroken PT symmetry, in which all of the eigenvalues are real, and the region of broken PT symmetry, in which some of the eigenvalues are complex. The precise location of the boundary between these two regions is determined numerically using extrapolation techniques and analytically using WKB analysis.

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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