Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-05-15
Phys.Lett. B515 (2001) 181-184
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX, 5 pages, no figures
Scientific paper
10.1016/S0370-2693(01)00856-5
The four dimensional O(3) non-linear sigma model introduced by Faddeev and Niemi, with a Skyrme-like higher order term to stabilise static knot solutions classified by the Hopf invariant, can be rewritten in terms of the complex two-component CP1 variables. A further rewriting of these variables in terms of SU(2) curvature free gauge fields is performed. This leads us to interpret SU(2) pure gauge vacuum configurations, in a particular maximal abelian gauge, in terms of knots with the Hopf invariant equal to the winding number of the gauge configuration.
Baal Pierre van
Wipf Andreas
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