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arXiv 2412.20122nlin.SImath-phmath.MP
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多组分Toda晶格层级

Multi-component Toda lattice hierarchy

T. Takebe, A. Zabrodin

AI总结:

本文介绍了多组分Toda晶格层级的结构与推导,展示了其与KP层级的关系,并通过自由费米技术获得tau函数的双线性积分方程,给出了多组分单孤子解的例子。

摘要:

我们详细介绍了N组分Toda晶格层级。该层级是Ueno和Takasaki引入的层级的扩展版本。我们的版本包含N个离散变量,而不是一个。我们从Lax形式主义开始,从其推导出波函数的双线性关系,并基于此证明tau函数的存在。我们还展示了多组分Toda晶格层级如何嵌入到通用层级中,该层级本质上是多组分KP层级。最后,我们展示了如何使用自由费米技术获得tau函数的双线性积分方程。还给出了一个精确解的例子(多组分Toda晶格的一个单孤子解的类比)。

英文摘要:

We give a detailed account of the N -component Toda lattice hierarchy. This hierarchy is an extended version of the one introduced by Ueno and Takasaki. Our version contains N discrete variables rather than one. We start from the Lax formalism, deduce the bilinear relation for the wave functions from it and then, based on the latter, prove existence of the tau-function. We also show how the multi-component Toda lattice hierarchy is embedded into the universal hierarchy which is basically the multi-component KP hierarchy. At last, we show how the bilinear integral equation for the tau-function can be obtained using the free fermion technique. An example of exact solutions (a multi-component analogue of one-soliton solutions) is given.

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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