Superpotentials, A-infinity Relations and WDVV Equations for Open Topological Strings

Details Superpotentials, A-infinity Relations and WDVV Equations for Open Topological Strings Superpotentials, A-infinity Relations and WDVV Equations for Open Topological Strings

Publishing date

2004-02-16

URL

arxiv.org/abs/hep-th/0402110v2

Journals

JHEP0502:071,2005

Science

Physics

Field

High Energy Physics

SubField

High Energy Physics - Theory

Additional info

53 pages

Type

Scientific paper

Digital Object Identifier

10.1088/1126-6708/2005/02/071

Abstract

We give a systematic derivation of the consistency conditions which constrain open-closed disk amplitudes of topological strings. They include the A-infinity relations (which generalize associativity of the boundary product of topological field theory), as well as certain homotopy versions of bulk-boundary crossing symmetry and Cardy constraint. We discuss integrability of amplitudes with respect to bulk and boundary deformations, and write down the analogs of WDVV equations for the space-time superpotential. We also study the structure of these equations from a string field theory point of view. As an application, we determine the effective superpotential for certain families of D-branes in B-twisted topological minimal models, as a function of both closed and open string moduli. This provides an exact description of tachyon condensation in such models, which allows one to determine the truncation of the open string spectrum in a simple manner.

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