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arXiv 2004.08679math-phmath.CAmath.MPmath.SP
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一族新的对称正交多项式和一个可解的动力学自旋链模型

New family of symmetric orthogonal polynomials and a solvable model of a kinetic spin chain

Tomáš Kalvoda, František Štampach

摘要:

我们研究了一个无限的一维伊辛自旋链,每个粒子只与其最近的邻居相互作用,并与热浴接触,温度沿链双曲线衰减。磁化强度(自旋期望值)的时间演化由半无限Jacobi矩阵控制。该矩阵属于一个三参数家庭的雅可比矩阵的频谱问题原来是可解的基本超几何级数。作为结果,我们推出了相应的正交多项式的基本性质,这似乎是新的。最后,我们回到伊辛模型,研究了磁化强度和双自旋关联的时间演化。

英文摘要:

We study an infinite one-dimensional Ising spin chain where each particle interacts only with its nearest neighbors and is in contact with a heat bath with temperature decaying hyperbolically along the chain. The time evolution of the magnetization (spin expectation value) is governed by a semi-infinite Jacobi matrix. The matrix belongs to a three-parameter family of Jacobi matrices whose spectral problem turns out to be solvable in terms of the basic hypergeometric series. As a consequence, we deduce the essential properties of the corresponding orthogonal polynomials, which seem to be new. Finally, we return to the Ising model and study the time evolution of magnetization and two-spin correlations.

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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