Nordita HEP Local Seminars

Asymptotic symmetry group of the flat space string theory

by Waldemar Schulgin (ULB, Brussels)

Europe/Stockholm
132:028

132:028

Description
I will explain how to obtain the asymptotic symmetry group of the target space from the worldsheet perspective. I will review the AdS3 case and explain what are the difficulties to take the zero limit of the cosmological constant. I will realize the asymptotic symmetry group of three-dimensional flat space (BMS3-group) in terms of vertex operators on the string worldsheet. Motivated by the BMS3 construction I will discuss vertex operators associated with space-time diffeomorphisms in flat space string theory, and compute their algebra, which is a diffeomorphism algebra with higher derivative corrections.