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.