Open String Tachyon in Supergravity Solution
arXiv:hep-th/0409044 · doi:10.1142/S0217732305017354
Abstract
We study the tachyon condensation of the D-\bar{D}-brane system with a constant tachyon vev in the context of classical solutions of the Type II supergravity. We find that the general solution with the symmetry ISO(1,p)xSO(9-p) (the three-parameter solution) includes the extremal black p-brane solution as an appropriate limit of the solution with fixing one of the three parameters (c_1). Furthermore, we compare the long distance behavior of the solution with the massless modes of the closed strings from the boundary state of the D-\bar{D}-brane system with a constant tachyon vev. We find that we must fix c_1 to zero and the only two parameters are needed to express the tachyon condensation of the DD-brane system. This means that the parameter does not correspond to the tachyon vev of the DD-brane system.
20 pages, no figures, LaTeX2e, typos corrected, references added and more general result presented
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