Exact description of D-branes via tachyon condensation

  title={Exact description of D-branes via tachyon condensation},
  author={T. Asakawa and S. Sugimoto and S. Terashima},
  journal={Journal of High Energy Physics},
We examine the fluctuations around a Dp-brane solution in an unstable D-brane system using boundary states and also boundary string field theory. We show that the fluctuations correctly reproduce the fields on the Dp-brane. Plugging these into the action of the unstable D-brane system, we recover not only the tension and RR charge, but also full effective action of the Dp-brane exactly. Our method works for general unstable D-brane systems and provides a simple proof of D-brane descent/ascent… Expand

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