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Preprint | PUBDB-2022-07841 |
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2022
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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-07841
Report No.: DESY-22-205; arXiv:2212.09533
Abstract: 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 $a=0.055\,\rm{fm}$.
Keyword(s): fermion, Wilson ; charge, topological ; lattice ; space-time ; geometry ; correlation function ; gauge field theory ; boundary condition ; lattice field theory ; suppression ; meson
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Journal Article/Contribution to a conference proceedings/Contribution to a book
Translating topological benefits in very cold lattice simulations
Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022) - Sissa Medialab Trieste, Italy, 2023. - ISBN - doi:10.22323/1.430.0368
The 39th International Symposium on Lattice Field Theory (Lattice 2022), Lattice 2022, BonnBonn, Germany, 8 Aug 2022 - 13 Aug 2022
Proceedings of Science / International School for Advanced Studies LATTICE2022, 368 (2022) [10.22323/1.430.0368]
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