We reexamine two-dimensional Lorentzian conformal field theory using the formalism previously developed in a study of sine-square deformation of Euclidean conformal field theory. We construct three types of Virasoro algebra. One of them reproduces the result by Luscher and Mack, while another type exhibits the divergence in the central charge term. The other leads the continuous spectrum and contains no closed time-like curve in the system.

中文翻译：

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通过正弦平方变形分析洛伦兹共形场论

我们使用先前在欧几里得共形场理论的正弦平方变形研究中开发的形式主义重新审视二维洛伦兹共形场理论。我们构造了三种类型的 Virasoro 代数。其中一种再现了 Luscher 和 Mack 的结果，而另一种则表现出中心电荷项的发散。另一个引导连续谱，在系统中不包含封闭的类时曲线。