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arXiv 0704.2326math-phhep-thmath.MPnlin.SI
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关于经典可积场论中缺陷的系统方法

On a systematic approach to defects in classical integrable field theories

V. Caudrelier

摘要:

我们提出了一个逆散射方法来处理经典可积场论中的缺陷。通过构造修正运动积分无穷集的母函数,系统地证明了其可积性。的缺陷的所有订单的贡献是明确地确定在一个缺陷矩阵。潜在的几何图像是,这些缺陷对应于局部化在给定点的贝克兰德变换。执行缺陷矩阵的分类以及对应的缺陷条件。该方法被应用于一系列众所周知的可积模型,并且以前的结果被直接恢复(并扩展)为特殊情况。最后,简要讨论了经典的$r$ -矩阵方法在这方面的关系,非均匀晶格模型和需要诉诸晶格正则化的可积场论的缺陷。

英文摘要:

We present an inverse scattering approach to defects in classical integrable field theories. Integrability is proved systematically by constructing the generating function of the infinite set of modified integrals of motion. The contribution of the defect to all orders is explicitely identified in terms of a defect matrix. The underlying geometric picture is that those defects correspond to Backlund transformations localized at a given point. A classification of defect matrices as well as the corresponding defect conditions is performed. The method is applied to a collection of well-known integrable models and previous results are recovered (and extended) directly as special cases. Finally, a brief discussion of the classical $r$-matrix approach in this context shows the relation to inhomogeneous lattice models and the need to resort to lattice regularizations of integrable field theories with defects.

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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