Instantons and the A2 condensate
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InstantonsLandau gauge
Lattice
Publication date
2002-08Abstract
We argue that the A2OPE condensate found in the Landau gauge on lattices, when an operator product expansion of Green's functions is performed, might be explained by instantons. We use cooling to estimate the instanton contribution and extrapolate back the result to the thermalized configuration. The resulting A2inst is similar to A2OPE.