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Article overview
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Translating topological benefits in very cold lattice simulations | | Mattia Bruno
; Marco Cè
; Anthony Francis
; Jeremy R. Green
; Max Hansen
; Savvas Zafeiropoulos
; | | Date: |
19 Dec 2022 | | 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 $a=0.055,
m{fm}$. | | Source: | arXiv, 2212.09533 | | Services: | Forum | Review | PDF | Favorites | |
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