arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1605.04099nlin.SIcond-mat.stat-mechhep-thmath-phmath.MP
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准二维相互作用标量场量子场模型的Bethe近似解

Exact Bethe ansatz solution for a quantum field model of interacting scalar fields in quasi-two dimensions

Anjan Kundu

摘要:

已知可积量子场模型主要存在于一维空间中。利用可积系统的多重时间概念和高阶Lax矩阵,构造了一个新的包含相互作用场的准二维量子场模型.通过对表示非标准标量场的基本场寻找一种新的对易规则,证明了该模型的Yang-Baxter可积性。尽管与量子朗道-利夫希茨方程有着密切的联系,但本模型在其内容和所得结果上与量子朗道-利夫希茨方程有很大的不同。进一步利用代数Bethe方法,我们精确地解决了这个量子场模型的所有高阶守恒算符的本征值问题。这里提出的想法应该煽动建设一类新的可积场和格模型和探索一种新的类型的基础代数。

英文摘要:

Integrable quantum field models are known to exist mostly in one space-dimension. Exploiting the concept of multi-time in integrable systems and a Lax matrix of higher scaling order, we construct a novel quantum field model in quasi-two dimensions involving interacting fields. The Yang-Baxter integrability is proved for the model by finding a new kind of commutation rule for its basic fields, representing nonstandard scalar fields along the transverse direction. In spite of a close link with the quantum Landau-Lifshitz equation, the present model differs widely from it, in its content and the result obtained. Using further the algebraic Bethe ansatz we solve exactly the eigenvalue problem of this quantum field model for all its higher conserved operators. The idea presented here should instigate the construction of a novel class of integrable field and lattice models and exploration of a new type of underlying algebras.

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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