Stable BPS D2/anti-D2 Bound System Connected by an Elliptic Supertube

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  • 12 December 2001
Abstract
An exact solution, in which a D2-brane and an anti-D2-brane are bridged with a band of D0-charged IIA superstrings, is obtained without any junction condition. In view of Born-Infeld description of a D-brane, the connecting band of D0-charged superstrings can be "blown-up" to an elliptically tubular D2-brane, which makes the whole system perfectly $(1/4)$-supersymmetric. It is shown that D0-charge density is minimized at the connecting throat neck, thereby not ``blowing-up'' the band there. We show that the asymptotic end regions of the throat describe a D2-brane and an anti-D2-brane with uniform but opposite magnetic fluxes and radial Coulomb-like electric fields produced by oppositely charged superstring ends.

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