Brane-Antibrane Action from Boundary String Field Theory
Abstract
In this paper we give the boundary string theory description of brane-antibrane systems. From the worldsheet action of brane-antibrane systems we obtain the tachyon potential and discuss the tachyon condensation exactly. We also find the world-volume action including the gauge fields. Moreover we determine RR-couplings exactly for non-BPS branes and brane-antibranes. These couplings are known as superconnections and correspond to K^0(M) and K^1(M) for the non-BPS branes and brane-antibranes, respectively. We also show that Myers terms appear if we include the transverse scalars in the boundary sigma model action.Keywords
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