Non-Abelian Vortices on Riemann Surfaces: an Integrable Case |
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Authors: | Alexander D Popov |
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Institution: | 1. Institut für Theoretische Physik, Leibniz Universit?t Hannover, Appelstra?e 2, 30167, Hannover, Germany 2. Bogoliubov Laboratory of Theoretical Physics, JINR, 141980, Dubna, Moscow Region, Russia
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Abstract: | We consider U(n + 1) Yang–Mills instantons on the space Σ × S 2, where Σ is a compact Riemann surface of genus g. Using an SU(2)-equivariant dimensional reduction, we show that the U(n + 1) instanton equations on Σ × S 2 are equivalent to non-Abelian vortex equations on Σ. Solutions to these equations are given by pairs (A,?), where A is a gauge potential of the group U(n) and ? is a Higgs field in the fundamental representation of the group U(n). We briefly compare this model with other non-Abelian Higgs models considered recently. Afterwards we show that for g > 1, when Σ × S 2 becomes a gravitational instanton, the non-Abelian vortex equations are the compatibility conditions of two linear equations (Lax pair) and therefore the standard methods of integrable systems can be applied for constructing their solutions. |
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