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arXiv 1504.07063math-phmath.MPquant-ph
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关于经典$θ$ -函数的量子化

On a Quantization of the Classical $θ$-Functions

Yurii V. Brezhnev

摘要:

雅可比θ函数允许通过自治微分方程(动力系统)定义;而不仅仅是通过著名的傅立叶θ级数。我们在哈密顿动力学的框架下研究了这个系统,并找到了相应的泊松括号。这些成分的可用性使我们能够说明这些方程的正则量子化问题,并揭示了一些重要的问题。在特定情况下,这个问题是完全可解的,因为可以找到哈密顿量的谱,谱是连续的,具有带能带结构的无限个,并且由马蒂厄方程确定:具有周期性cos型势的薛定谔方程。

英文摘要:

The Jacobi theta-functions admit a definition through the autonomous differential equations (dynamical system); not only through the famous Fourier theta-series. We study this system in the framework of Hamiltonian dynamics and find corresponding Poisson brackets. Availability of these ingredients allows us to state the problem of a canonical quantization to these equations and disclose some important problems. In a particular case the problem is completely solvable in the sense that spectrum of the Hamiltonian can be found. The spectrum is continuous, has a band structure with infinite number of lacunae, and is determined by the Mathieu equation: the Schrödinger equation with a periodic cos-type potential.

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