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Hopf solitons from instanton holonomy. (2001)
Journal Article
Ward, R. (2001). Hopf solitons from instanton holonomy. Nonlinearity, 14(6), 1543-1554. https://doi.org/10.1088/0951-7715/14/6/307

The holonomy of an SU(2) N-instanton in the x4-direction gives a map from Bbb R3 into SU(2), which provides a good model of an N-Skyrmion. Combining this map with the standard Hopf map from SU(2)congS3 to S2 gives a configuration for a Hopf soliton o... Read More about Hopf solitons from instanton holonomy..

Integrable Yang-Mills-Higgs equations in 3-dimensional de Sitter space-time. (2001)
Journal Article
Kotecha, V., & Ward, R. (2001). Integrable Yang-Mills-Higgs equations in 3-dimensional de Sitter space-time. Journal of Mathematical Physics, 42(3), 1018-1025. https://doi.org/10.1063/1.1345499

This paper describes an integrable Yang–Mills–Higgs system on (2+1)-dimensional de Sitter space–time. It is the curved-space–time analog of the Bogomolnyi equations for monopoles on R3.R3. A number of solutions, of various types, are constructed. Read More about Integrable Yang-Mills-Higgs equations in 3-dimensional de Sitter space-time..