-

Asymptotic symmetries from the string worldsheet

组织者

崔嵬 , 徐锋军

演讲者

Zheng-Yuan Du

时间

2024年05月17日 14:00 至 16:00

地点

A3-4-312

线上

Zoom 637 734 0280 (BIMSA)

摘要

Asympototic symmetry plays an important role in holography. In IIB string theory on AdS3 background with NS-NS fluxes, we show that Brown-Henneaux asymptotic Killing vectors can be derived by requiring both the worldsheet equations of motion and Virasoro constraints are preserved near the asymptotic boundary of the target spacetime. The charges on the worldsheet that generate the corresponding transformations can be written down in both the Lagrangian formalism and Hamiltonian formalism. This provides a method of studying asymptotic symmetry of the target spacetime directly from worldsheet string theories, without using results from the supergravity limit. As an example, we apply this method to flat spacetime in three dimensions and obtain the BMS3 generators on the worldsheet theory.