Periodic instantons with non-trivial holonomy Original Research Article

We present the detailed derivation of the charge-1 periodic instantons — or calorons — with non-trivial holonomy for SU(2). We use a suitable combination of the Nahm transformation and ADHM techniques. Our results rely on our ability to compute explicitly the relevant Greenʹs function in terms of which the solution can be conveniently expressed. We also discuss the properties of the moduli space R3 × S1 × Taub-NUT/Z2 and its metric, relating the holomony to the Taub-NUT mass parameter. We comment on the monopole constituent description of these calorons, how to retrieve topological charge in the context of abelian projection and possible applications to QCD.