Coupling of Rolling Tachyon to Closed Strings

Abstract

We study the late time behavior of the boundary state representing the rolling tachyon constructed by Sen. It is found that the coupling of the rolling tachyon to massive modes of the closed string grows exponentially as the system evolves. We argue that the description of rolling tachyon by a boundary state is valid during the finite time determined by string coupling, and that energy could be dissipated to the bulk beyond this time. We also comment on the relation between the rolling tachyon boundary state and the spacelike D-brane boundary state.

18 pages, no figure; v2, reference added, minor corrections; v3, final version that appeared in Nucl.Phys. B

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• Tachyon Kinks
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• Comments on Half S-Branes
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• The Final Fate of the Rolling Tachyon
• Remarks on the rolling tachyon BCFT
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• Non-abelian expansion of S-matrix elements and non-abelian tachyon DBI action
• On D-brane-Anti D-brane Effective actions and their all order Bulk Singularity Structures
• One-loop Evolution of a Rolling Tachyon
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• Cosmological Solution from D-brane motion in NS5-Branes background
• Moduli Space of Unstable D-branes on a Circle of Critical Radius
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