Abstract：

The TTbar deformation is a special type of "solvable" deformation. When applied to CFTs, the deformed theory shows signs of nonlocality and can be further reformulated as a string theory. Under this framework, we develop worldsheet techniques to compute its entanglement entropy via a generalization of the replica trick in string theory. The result hints at a process where nonlocality is gradually introduced through the deformation and finally smooths out the UV cutoff of the original CFT. The talk will be based on arxiv:2507.15220.

报告人简介：

Wen-Xin Lai is a postdoc from the Kavli Institute for Theoretical Sciences (KITS), University of Chinese Academy of Sciences, working on holography and related subjects. He received his PhD from the Yau Mathematical Sciences Center, Tsinghua University.