The diagonal cosets of the Heisenberg group
D'APPOLLONIO, GIUSEPPE;
2008-01-01
Abstract
In this paper we study the diagonal cosets of the non-compact H-4 WZW model. Generalising earlier work by Antoniadis and Obers, we provide an exact world-sheet description for several families of non-maximally symmetric gravitational plane waves with background NS fluxes. We show that the sigma-models that correspond to an asymmetric action of the gauge group smoothly interpolate between singular and non-singular plane waves. We also analyse the representations of the coset chiral algebra and derive the spectrum of all the models.Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.