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arXiv 1802.07593math-phhep-thmath.MPnlin.SI
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经典可积边界条件从Hamilton到零曲率公式

From Hamiltonian to zero curvature formulation for classical integrable boundary conditions

Jean Avan, Vincent Caudrelier, Nicolas Crampe

摘要:

在1+1维时空中,我们调和了经典可积系统可积边界条件的Hamilton形式和零曲率表示。我们开始从一个超局部泊松代数涉及一个Lax矩阵和两个(动态)边界矩阵。利用Sklyanin的双行传递矩阵公式,导出了Lax矩阵{ \bf}和边界矩阵的Hamilton运动方程,并以零曲率方程的形式表示。该方法的一个关键组成部分是一个边界版本的Semenov-Tian-Shansky公式的生成函数的时间部分的拉克斯对。该过程是说明有限的Toda链,我们得出的拉克斯对大小$2\times 2$为以前已知的哈密尔顿型$BC_N$和$D_N$分别对应于常数和动态边界矩阵。

英文摘要:

We reconcile the Hamiltonian formalism and the zero curvature representation in the approach to integrable boundary conditions for a classical integrable system in 1+1 space-time dimensions. We start from an ultralocal Poisson algebra involving a Lax matrix and two (dynamical) boundary matrices. Sklyanin's formula for the double-row transfer matrix is used to derive Hamilton's equations of motion for both the Lax matrix {\bf and} the boundary matrices in the form of zero curvature equations. A key ingredient of the method is a boundary version of the Semenov-Tian-Shansky formula for the generating function of the time-part of a Lax pair. The procedure is illustrated on the finite Toda chain for which we derive Lax pairs of size $2\times 2$ for previously known Hamiltonians of type $BC_N$ and $D_N$ corresponding to constant and dynamical boundary matrices respectively.

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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