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Compact lattice formulation of Cho-Faddeev-Niemi decomposition: string tension from magnetic monopoles

S. Ito·S. Kato·K. -I. Kondo·T. Murakami·A. Shibata·T. Shinohara
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Abstract

In this paper we begin on a new lattice formulation of the non-linear change of variables called the Cho--Faddeev--Niemi decomposition in SU(2) Yang-Mills theory. This is a compact lattice formulation improving the non-compact lattice formulation proposed in our previous paper. Based on this formulation, we propose a new gauge-invariant definition of the magnetic monopole current which guarantees the magnetic charge quantization and reproduces the conventional magnetic-current density obtained in the Abelian projection based on the DeGrand--Toussaint method. Finally, we demonstrate the magnetic monopole dominance in the string tension in SU(2) Yang-Mills theory on a lattice. Our formulation enables one to reproduce in the gauge-invariant way remarkable results obtained so far only in the Maximally Abelian gauge.

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S. Ito, S. Kato, K. -I. Kondo, T. Murakami, A. Shibata, T. Shinohara. 2006-11-06. Compact lattice formulation of Cho-Faddeev-Niemi decomposition: string tension from magnetic monopoles. https://doi.org/10.1016/j.physletb.2006.11.066

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