Noncommutative instantons in higher dimensions, vortices and topological K-cycles
Noncommutative instantons in higher dimensions, vortices and topological K-cycles
复制标题
高维中的非交换瞬子、涡流和拓扑 K 循环
DOI:
10.1088/1126-6708/2003/12/022
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发表时间:
2003
影响因子:
5.4
通讯作者:
R. Szabo
中科院分区:
文献类型:
--
作者:
O. Lechtenfeld;A. D. Popov;R. Szabo
We construct explicit BPS and non-BPS solutions of the U(2k) Yang-Mills equations on the noncommutative space 2nθ × S2 with finite energy and topological charge. By twisting with a Dirac multi-monopole bundle over S2, we reduce the Donaldson-Uhlenbeck-Yau equations on 2nθ × S2 to vortex-type equations for a pair of U(k) gauge fields and a bi-fundamental scalar field on 2nθ. In the SO(3)-invariant case the vortices on 2nθ determine multi-instantons on 2nθ × S2. We show that these solutions give natural physical realizations of Bott periodicity and vector bundle modification in topological K-homology, and can be interpreted as a blowing-up of D0-branes on 2nθ into spherical D2-branes on 2nθ × S2. In the generic case with broken rotational symmetry, we argue that the D0-brane charges on 2nθ × S2 provide a physical interpretation of the Adams operations in K-theory.