Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-08-29
Phys.Lett. B495 (2000) 193-200
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, no figure, v2. final version to appear in Physics Letters B
Scientific paper
10.1016/S0370-2693(00)01238-7
On a noncommutative space of rank-1, we construct a codimension-one soliton explicitly and, in the context of noncommutative bosonic open string field theory, identify it with the D24-brane. We compute the tension of the proposed D24-brane, yielding an exact value and show that it is related to the tension of the codimension two D23-brane by the string T-duality. This resolves an apparent puzzle posed by the result of Harvey, Kraus, Larsen and Martinec and proves that the T-duality is a gauge symmetry; in particular, at strong noncommutativity, it is part of the U(oo) gauge symmetry on the worldvolume. We also apply the result to non-BPS D-branes in superstring theories and argue that the codimension-one soliton gives rise to new descent relation among the non-BPS D-branes in Type IIA and Type IIB string theories via T-duality.
Mandal Gautam
Rey Soo-Jong
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