A new lattice action for studying topological charge
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Hernández Gamazo, Pilar; Sundrum, Raman
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Aquest document és un/a article, creat/da en: 1996
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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. |
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