Open-Closed String Correspondence in Open String Field Theory

Abstract

We address the problem of describing different closed string backgrounds in background independent open string field theory: A shift in the closed string background corresponds to a collective excitation of open strings. As an illustration we apply the formalism to the case where the closed string background is a group manifold.

Based on a talk given at the BW2007 workshop "Challenges Beyond the Standard Model", Kladovo, Serbia. To be published in Fortschritte der Physik