Asymptotic symmetry group of the flat space string theory

OKC/Nordita High-Energy Physics Theory seminar

Friday 14 March 2014
from 10:30
to 11:30 at
132:028

Speaker :

Waldemar Schulgin (ULB, Brussels)

Abstract :

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.