Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-08-13
Physics
High Energy Physics
High Energy Physics - Theory
41 pages, 5 figures; Talks delivered at the Asia Pacific Center for Theoretical Physics Third Winter School on Duality in Fiel
Scientific paper
I review some aspects of BPS magnetic monopoles and of electric-magnetic duality in theories with arbitrary gauge groups. When the symmetry is maximally broken to a U(1)^r subgroup, all magnetically charged configurations can be understood in terms of r species of massive fundamental monopoles. When the unbroken group has a non-Abelian factor, some of these fundamental monopoles become massless and can be viewed as the duals to the massless gauge bosons. Rather than appearing as distinct solitons, these massless monopoles are manifested as clouds of non-Abelian field surrounding one or more massive monopoles. I describe in detail some examples of solutions with such clouds.
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