A review showing that symmetric instantons reduce to hyperbolic monopoles and vortices whose dilute gas yields an area law for the Wilson loop, giving a semi-classical, holographic picture of quark confinement.
On Yang--Mills instantons over multi-centered gravitational instantons
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In this paper we explicitly calculate the analogue of the 't Hooft SU(2) Yang--Mills instantons on Gibbons--Hawking multi-centered gravitational instantons which come in two parallel families: the multi-Eguchi--Hanson, or A_k ALE gravitational instantons and the multi-Taub--NUT, or A_k ALF gravitational instantons. We calculate their action and find the reducible ones. Following Kronheimer we also exploit the U(1) invariance of our solutions and study the corresponding explicit singular SU(2) magnetic monopole solutions on Euclidean three-space.
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Quark confinement consistent with holography due to hyperbolic magnetic monopoles and hyperbolic vortices unifiedly reduced from symmetric instantons
A review showing that symmetric instantons reduce to hyperbolic monopoles and vortices whose dilute gas yields an area law for the Wilson loop, giving a semi-classical, holographic picture of quark confinement.