Dirichlet boundary state in a linear dilaton background

Miao Li
1996 Physical Review D, Particles and fields  
Dirichlet-branes have emerged as important objects in studying nonperturbative string theory. It is important to generalize these objects to more general backgrounds other than the usual flat background. The simplest case is the linear dilaton condensate. The usual Dirichlet boundary condition violates conformal invariance in such a background. We show that by switching on a certain boundary interaction, conformal invariance is restored. An immediate application of this result is to two dimensional string theory.
doi:10.1103/physrevd.54.1644 pmid:10020839 fatcat:4o73fxga2vcplc2ozp2ufspr34