On the Effective Potential of the Dp- anti Dp system in type II theories

Abstract

We compute the effective potential of a system composed by a Dp brane and a separated anti-Dp brane at tree level in string theory. We show explicitly that the tachyon condenses and that the scalars which describe transverse fluctuations acquire a VEV proportional to the distance.

latex2e, 1+19 pages Corrected typos. Added criticisms to the previous interpration of the results and a new interpretation

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