IAS Quantum Aspects of Black Holes Group Meeting

Abstract: I use the method of images to derive the dilaton boundary term of the classical string action in a $Z_2$ orbifold (half space) with Neumann boundary conditions. The derivation is carried out to first order in alpha prime from the worldsheet nonlinear sigma model off-shell sphere path integral. I also show how the boundary term may be related to the notion of boundary local time in reflected Brownian motion.

This work is in collaboration with Rifath Khan at Stanford University.