Hopf Solitons on S^3 and R^3
arXiv:hep-th/9811176 · doi:10.1088/0951-7715/12/2/005
Abstract
The Skyrme-Faddeev system, a modified O(3) sigma model in three space dimensions, admits topological solitons with nonzero Hopf number. One may learn something about these solitons by considering the system on the 3-sphere of radius R. In particular, the Hopf map is a solution which is unstable for R > \sqrt{2}.
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