Double field theory for double D-branes
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- Albertsson, C., Dai, SH., Kao, PW. et al. J. High Energ. Phys. (2011) 2011: 25. doi:10.1007/JHEP09(2011)025
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We consider Hull’s doubled formalism for open strings on D-branes in flat space and construct the corresponding effective double field theory. We show that the worldsheet boundary conditions of the doubled formalism describe in a unified way a T-dual pair of D-branes, which we call double D-branes. We evaluate the one-loop beta function for the boundary gauge coupling and then obtain the effective field theory for the double D-branes. The effective field theory is described by a DBI action of double fields. The T-duality covariant form of this DBI action is thus a kind of “master” action, which describes all the double D-brane configurations related by T-duality transformations. We discuss a number of aspects of this effective theory.