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Abstract
This note presents a method to reduce the discretization errors appearing when solving a Quantum Field Theory in a hypercubic lattice in both position and momentum-space. The method exploits the artifacts that break rotational symmetry to recover rotationally invariant results for two-point Green functions. We show that a combination of the results obtained in position and momentum space can be useful to signal the presence of rotationally invariant artifacts making use of their approximate Fourier transforms in the continuum. The method will be introduced using a Klein-Gordon propagator, and a direct application to gluon propagator in quenched lattice QCD will be given.
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Details
1 Universidad Pablo de Olavide, Departamento de Sistemas Físicos, Químicos y Naturales, Sevilla, Spain (GRID:grid.15449.3d) (ISNI:0000 0001 2200 2355)