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Open String Tachyon in Supergravity Solution

Shinpei Kobayashi·Tsuguhiko Asakawa·So Matsuura
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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 $c_1$ does not correspond to the tachyon vev of the DD-brane system.

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Shinpei Kobayashi, Tsuguhiko Asakawa, So Matsuura. 2005-06-13. Open String Tachyon in Supergravity Solution. https://doi.org/10.1142/s0217732305017354

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