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arXiv 2103.00214nlin.SImath-phmath.MP
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Toda格族的椭圆解与椭圆型Ruijsenaars-Schneider模型

Elliptic solutions to Toda lattice hierarchy and elliptic Ruijsenaars-Schneider model

V. Prokofev, A. Zabrodin

摘要:

我们考虑二维Toda格族的解,它们是第0时刻t_0=x的椭圆函数。已知它们的极点随t_1的变化象椭圆型Ruijsenaars-Schneider模型的粒子运动。本文的目标是将这种对应关系扩展到层次结构。我们证明了支配2D Toda格族的极点关于第m个层次时间t_m和\bar t_m的动力学的哈密顿量是由Ruijsenaars-Schneider模型的Lax矩阵在标记点处的谱曲线的展开得到的。

英文摘要:

We consider solutions of the 2D Toda lattice hierarchy which are elliptic functions of the zeroth time t_0=x. It is known that their poles as functions of t_1 move as particles of the elliptic Ruijsenaars-Schneider model. The goal of this paper is to extend this correspondence to the level of hierarchies. We show that the Hamiltonians which govern the dynamics of poles with respect to the m-th hierarchical times t_m and \bar t_m of the 2D Toda lattice hierarchy are obtained from expansion of the spectral curve for the Lax matrix of the Ruijsenaars-Schneider model at the marked points.

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