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arXiv quant-ph/0110157quant-ph
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修正Poschl-Teller势的一种新的动力学群方法

A new dynamical group approach to the modified Poschl-Teller potential

Shi-Hai Dong, R. Lemus

摘要:

本文概述了修正的Pöschl-Teller(MPT)势的性质。阶梯算子直接由波函数构造而成,不需要引入任何辅助变量。证明了这些算子都与$su(2)$代数相关联。函数$\sinh(αx)$和$\frac{\cosh(αx)}α \frac{d}{dx}$的解析表达式由这些梯形运算符计算。给出了坐标$x$和动量$\hat p$关于$su(2)$生成元的展开式。该分析允许在$su(2)$振子模型和分子振子的传统描述之间建立精确的量子力学联系。

英文摘要:

The properties of the modified Pöschl-Teller (MPT) potential are outlined. The ladder operators are constructed directly from the wave functions without introducing any auxiliary variable. It is shown that these operators are associated to the $su(2)$ algebra. Analytical expressions for the functions $\sinh(αx)$ and $\frac{\cosh(αx)}α \frac{d}{dx}$ are evaluated from these ladder operators. The expansions of the coordinate $x$ and momentum $\hat p$ in terms of the $su(2)$ generators are presented. This analysis allows to establish an exact quantum-mechanical connection between the $su(2)$ vibron model and the traditional descriptions of molecular vibron.

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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