The moduli space of two U(1) instantons on noncommutative $R^4$ and $R^3\times S^1$

Details The moduli space of two U(1) instantons on noncommutative $R^4$ and $R^3\times S^1$ The moduli space of two U(1) instantons on noncommutative $R^4$ and $R^3\times S^1$

2000-08-11

arxiv.org/abs/hep-th/0008092v3

Phys.Rev. D63 (2001) 065017

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, no figure, additional references

Scientific paper

10.1103/PhysRevD.63.065017

We employ the ADHM method to derive the moduli space of two instantons in U(1) gauge theory on a noncommutative space. We show by an explicit hyperK\"ahler quotient construction that the relative metric of the moduli space of two instantons on $R^4$ is the Eguchi-Hanson metric and find a unique threshold bound state. For two instantons on $R^3\times S^1$, otherwise known as calorons, we give the asymptotic metric and conjecture a completion. We further discuss the relationship of caloron moduli spaces of A, D and E groups to the Coulomb branches of three dimensional gauge theory. In particular, we show that the Coulomb branch of SU(2) gauge group with a single massive adjoint hypermultiplet coincides with the above two caloron moduli space.

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