Noncommutative Gauge Theory on Fuzzy Sphere from Matrix Model

Details Noncommutative Gauge Theory on Fuzzy Sphere from Matrix Model Noncommutative Gauge Theory on Fuzzy Sphere from Matrix Model

2001-01-16

arxiv.org/abs/hep-th/0101102v4

Nucl.Phys. B604 (2001) 121-147

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, more investigations of the theory in the commutative limit and references added

Scientific paper

10.1016/S0550-3213(01)00173-0

We derive a noncommutative U(1) and U(n) gauge theory on the fuzzy sphere from a three dimensional matrix model by expanding the model around a classical solution of the fuzzy sphere. Chern-Simons term is added in the matrix model to make the fuzzy sphere as a classical solution of the model. Majorana mass term is also added to make it supersymmetric. We consider two large $N$ limits, one corresponding to a gauge theory on a commutative sphere and the other to that on a noncommutative plane. We also investigate stability of the fuzzy sphere by calculating one-loop effective action around classical solutions. In the final part of this paper, we consider another matrix model which gives a supersymmetric gauge theory on the fuzzy sphere. In this matrix model, only Chern-Simons term is added and supersymmetry transformation is modified.

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