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Stabilised Wilson Fermions (SWF) are a new avenue for QCD calculations with Wilson-type fermions. The OpenLat initiative is currently the only collaboration following this new line of research. With resources in the US, Germany, France and Finland OpenLat has been able to produce gauge field ensembles of 2+1 flavours of SWF across a wide range of lattice spacings \(a=0.055, 0.064, 0.077, 0.094, 0.12\)  fm, with HLRS providing the most important contribution at the finest resolution of \(a=0.055\)  fm so far. Matching the physical parameters as well as algorithmic tuning is increasingly challenging with decreasing lattice spacing as one has to switch to open boundary conditions to overcome the well-known topological freezing problem. We report on progress in simulating QCD at \(a=0.055\)  fm and decreasing physical pion masses, as well on first observable measurements on such lattices.

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QCD Simulations with Stabilised Wilson Fermions, Towards the Physical Pion Mass at a Fine Lattice Spacing

  • 章节

  • 发表日期：

    2026年

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  • Rocco Francesco Basta,
  • Francesca Cuteri,
  • Anthony Francis,
  • Patrick Fritzsch,
  • Giovanni Pederiva,
  • Antonio Rago,
  • Andrea Shindler,
  • Andre Walker-Loud,
  • Savvas Zafeiropoulos

摘要

Stabilised Wilson Fermions (SWF) are a new avenue for QCD calculations with Wilson-type fermions. The OpenLat initiative is currently the only collaboration following this new line of research. With resources in the US, Germany, France and Finland OpenLat has been able to produce gauge field ensembles of 2+1 flavours of SWF across a wide range of lattice spacings \(a=0.055, 0.064, 0.077, 0.094, 0.12\)  fm, with HLRS providing the most important contribution at the finest resolution of \(a=0.055\)  fm so far. Matching the physical parameters as well as algorithmic tuning is increasingly challenging with decreasing lattice spacing as one has to switch to open boundary conditions to overcome the well-known topological freezing problem. We report on progress in simulating QCD at \(a=0.055\)  fm and decreasing physical pion masses, as well on first observable measurements on such lattices.