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Communication Dans Un Congrès Année : 2023

Translating topological benefits in very cold lattice simulations

Mattia Bruno
  • Fonction : Auteur
Marco Cè
  • Fonction : Auteur
Anthony Francis
  • Fonction : Auteur
Max Hansen
  • Fonction : Auteur
Jeremy R. Green
  • Fonction : Auteur

Résumé

Master-field simulations offer an approach to lattice QCD in which calculations are performed on a small number of large-volume gauge-field configurations. The latter is advantageous for simulations in which the global topological charge is frozen due to a very fine lattice spacing, as the effect of this on observables is suppressed by the spacetime volume. Here we make use of the recently developed Stabilised Wilson Fermions to investigate a variation of this approach in which only the temporal direction ($T$) is taken larger than in traditional calculations. As compared to a hyper-cubic lattice geometry, this has the advantage that finite-$L$ effects can be useful, e.g. for multi-hadron observables, while compared to open boundary conditions, time-translation invariance is not lost. In this proof-of-concept contribution, we study the idea of using very cold (i.e. long-$T$) lattices to topologically "defrost" observables at fine lattice spacing. We identify the scalar-scalar meson two-point correlation function as a useful probe and present first results from $N_f=3$ ensembles with time extents up to $T=2304$ and a lattice spacing of $a=0.055\,\rm{fm}$.

Dates et versions

hal-03925350 , version 1 (05-01-2023)

Identifiants

Citer

Mattia Bruno, Marco Cè, Anthony Francis, Max Hansen, Savvas Zafeiropoulos, et al.. Translating topological benefits in very cold lattice simulations. 39th International Symposium on Lattice Field Theory, Aug 2022, Bonn, Germany. pp.368, ⟨10.22323/1.430.0368⟩. ⟨hal-03925350⟩
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