arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.02864hep-th
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电流-电流变形、保角积分和关联函数

Current-current deformations, conformal integrals and correlation functions

Gaston Giribet, Matias Leoni

摘要:

受最近对二维CFTs的$T\bar{T}$型形变研究的启发,研究了一类特殊的AdS $_3$ /CFT $_2$对应的单迹形变.从世界面的角度来看,这对应于AdS $_3$上的$σ$模型的边缘变形,其产生了在AdS $_3$和平坦线性微扰子解之间插值的弦背景。在这里,为了进一步研究这个世界表CFT,我们考虑它存在一个边界。在以前的文章中,我们计算了圆盘上的不同关联函数,包括体1点函数,边界-边界2点函数和体-边界2点函数。这导致我们计算体积和边界顶点算子的反常维数,这首先需要对共形积分的紫外发散进行适当的正则化。在这里,我们通过计算磁盘上的大容量2点函数和球体上的其他观测量来扩展分析。我们证明了在我们以前的工作中提出的顶点算子的重整化与球$N$ -点函数的形式是一致的。

英文摘要:

Motivated by the recent work on $T\bar{T}$-type deformations of 2D CFTs, a especial class of single-trace deformations of AdS$_3$/CFT$_2$ correspondence has been investigated. From the worldsheet perspective, this corresponds to a marginal deformation of the $σ$-model on AdS$_3$ that yields a string background that interpolates between AdS$_3$ and a flat linear dilaton solution. Here, with the intention of studying this worldsheet CFT further, we consider it in the presence of a boundary. In a previous paper, we computed different correlation functions of this theory on the disk, including the bulk 1-point function, the boundary-boundary 2-point function, and the bulk-boundary 2-point function. This led us to compute the anomalous dimension of both bulk and boundary vertex operators, which first required a proper regularization of the ultraviolet divergences of the conformal integrals. Here, we extend the analysis by computing the bulk-bulk 2-point function on the disk and other observables on the sphere. We prove that the renormalization of the vertex operators proposed in our previous works is consistent with the form of the sphere $N$-point functions.

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