Liouville理论和变形振子模型中的时空间断
Space & time discontinuities in Liouville theory and the deformed oscillator model
摘要：
我们考虑变形谐振子作为一个离散版本的刘维尔理论和研究这个模型中存在的局部可积缺陷。由此，缺陷自由度的时间演化被确定，以局部运动方程的形式被发现。我们还重新连续刘维尔理论，推导出其局部积分的运动和比较这些与以前的结果从sine-Gordon的观点。最后，通用的Backlund型关系，相应的实现类时和类空杂质的连续介质模型。最后，我们考虑了刘维尔理论与自由无质量理论的接口。通过适当地选择缺陷（达布）矩阵，我们能够推导出刘维尔理论的异贝克兰德变换。
英文摘要：
We consider the deformed harmonic oscillator as a discrete version of the Liouville theory and study this model in the presence of local integrable defects. From this, the time evolution of the defect degrees of freedom are determined, found in the form of the local equations of motion. We also revisit the continuous Liouville theory, deriving its local integrals of motion and comparing these with previous results from the sine-Gordon point of view.Finally, the generic Backlund type relations are presented, corresponding to the implementation of time-like and space-like impurities in the continuum model. Finally, we consider the interface of the Liouville theory with the free massless theory. With the appropriate choice of the defect (Darboux) matrix we are able to derive the hetero-Backlund transformation for the Liouville theory.
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