Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-04-04
J.Math.Phys. 47 (2006) 012306
Physics
High Energy Physics
High Energy Physics - Theory
45 pages, 4 figures; v2: minor corrections
Scientific paper
10.1063/1.2157005
We construct explicit BPS and non-BPS solutions of the Yang-Mills equations on the noncommutative space R^{2n}_\theta x S^2 which have manifest spherical symmetry. Using SU(2)-equivariant dimensional reduction techniques, we show that the solutions imply an equivalence between instantons on R^{2n}_\theta x S^2 and nonabelian vortices on R^{2n}_\theta, which can be interpreted as a blowing-up of a chain of D0-branes on R^{2n}_\theta into a chain of spherical D2-branes on R^{2n} x S^2. The low-energy dynamics of these configurations is described by a quiver gauge theory which can be formulated in terms of new geometrical objects generalizing superconnections. This formalism enables the explicit assignment of D0-brane charges in equivariant K-theory to the instanton solutions.
Popov Alexander D.
Szabo Richard J.
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