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Spectral curves of hyperbolic monopoles from ADHM

Sutcliffe, Paul (2021) 'Spectral curves of hyperbolic monopoles from ADHM.', Journal of physics A : mathematical and theoretical., 54 (16). p. 165401.


Magnetic monopoles in hyperbolic space are in correspondence with certain algebraic curves in mini-twistor space, known as spectral curves, which are in turn in correspondence with rational maps between Riemann spheres. Hyperbolic monopoles correspond to circle-invariant Yang–Mills instantons, with an identification of the monopole and instanton numbers, providing the curvature of hyperbolic space is tuned to a value specified by the asymptotic magnitude of the Higgs field. In previous work, constraints on ADHM instanton data have been identified that provide a non-canonical realization of the circle symmetry that preserves the standard action of rotations in the ball model of hyperbolic space. Here formulae are presented for the spectral curve and the rational map of a hyperbolic monopole in terms of its constrained ADHM matrix. This extends earlier results that apply only to the subclass of instantons of JNR type. The formulae are applied to obtain new explicit examples of spectral curves that are beyond the JNR class.

Item Type:Article
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Publisher statement:© 2021 The Author(s). Published by IOP Publishing Ltd
Date accepted:12 February 2021
Date deposited:29 March 2021
Date of first online publication:25 March 2021
Date first made open access:29 March 2021

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