Full QCD with dynamical Wilson fermions on a 243 × 40-lattice — a feasibility study

The investigation of light sea-quark effects in lattice QCD with dynamical Wilson fermions requires both larger physical volumes and finer lattice resolutions than achieved previously. As high-end supercomputers like the 512-node APE Tower provide the compute power to perform a major step towards the chiral limit (TχL), we have launched a feasibiliy study on a 243 × 40 lattice. We approach the chiral limit-while refining the resolution-, using the standard Wilson fermion action. Following previous work, our Hybrid Monte Carlo simulation runs at β = 5.6 and two κ-values, 0.1575 and 0.158. From our study, we are confident that, for the APE Tower, a realistic working point has been found corresponding to a volume of 2 fm3, with chirality characterized by 1mπa ∼ 5.6.