A new lattice action for studying topological charge
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A new lattice action for studying topological charge

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A new lattice action for studying topological charge

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Hernández Gamazo, Pilar; Sundrum, Raman
This document is a artículoDate1996

Este documento está disponible también en : http://hdl.handle.net/10550/43336
We propose a new lattice action for non-abelian gauge theories, which will reduce short-range lattice artifacts in the computation of the topological susceptibility. The standard Wilson action is replaced by the Wilson action of a gauge covariant interpolation of the original fields to a finer lattice. If the latter is fine enough, the action of all configurations with non-zero topological charge will satisfy the necessary bound for the scaling of the topological susceptibility. As a simpler example we consider the O(3) σ-model in two dimensions, where a numerical analysis of discretized continuum instantons indicates that a finer lattice with half the lattice spacing of the original is enough to satisfy the continuum bound.

    Hernández Gamazo, Pilar Sundrum, Raman 1996 A new lattice action for studying topological charge Physics Letters B 385 1-4 254 257
http://dx.doi.org/10.1016/0370-2693(96)00838-6

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