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arXiv 1902.07551math-phhep-thmath.MPnlin.SI
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NLS模型中的类时边界条件

Time-like boundary conditions in the NLS model

Anastasia Doikou, Iain Findlay, Spyridoula Sklaveniti

摘要:

我们专注于非线性薛定谔模型,我们扩展了时空对偶的概念,在可积的类时边界条件的存在。我们确定了相关的时间像“保守”量和拉克斯对以及相应的边界条件。特别是,我们推导出的空间分量的拉克斯对的反射方程的解决方案所定义的类时边界的情况下的生成函数。边界上的解析条件拉克斯对导致时间类边界条件。作为产生相关层次的拉克斯对的空间分量的有效手段,也首次进行了类时修整。这在缺乏经典r-矩阵或考虑复杂的基本代数结构时尤其重要。导出了相应的时间Riccati方程和类时守恒量。我们使用的主要范例,为此目的的矩阵NLS型层次结构。

英文摘要:

We focus on the non-linear Schrodinger model and we extend the notion of space-time dualities in the presence of integrable time-like boundary conditions. We identify the associated time-like `conserved' quantities and Lax pairs as well as the corresponding boundary conditions. In particular, we derive the generating function of the space components of the Lax pairs in the case of time-like boundaries defined by solutions of the reflection equation. Analytical conditions on the boundary Lax pair lead to the time like-boundary conditions. The time-like dressing is also performed for the first time, as an effective means to produce the space components of the Lax pair of the associated hierarchy. This is particularly relevant in the absence of a classical r-matrix, or when considering complicated underlying algebraic structures. The associated time Riccati equations and hence the time-like conserved quantities are also derived. We use as the main paradigm for this purpose the matrix NLS-type hierarchy.

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