Dirac-Born-Infeld Action on the Tachyon Kink and Vortex

  title={Dirac-Born-Infeld Action on the Tachyon Kink and Vortex},
The tachyon effective field theory describing the dynamics of a non-BPS D-brane in superstring theory has an infinitely thin but finite tension kink solution describing a codimension one BPS D-brane. We study the world-volume theory of massless modes on the kink, and show that the world volume action has precisely the Dirac-Born-Infeld (DBI) form without any higher derivative corrections. We generalize this to a vortex solution in the effective field theory on a brane-antibrane pair. As in the… CONTINUE READING
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