Journal Article/Contribution to a conference proceedings/Contribution to a book

PUBDB-2022-08162

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Translating topological benefits in very cold lattice simulations

Bruno, M.DESY* ; Cè, M. ; Francis, A. (Corresponding author) ; Green, J. R.DESY* ; Hansen, M. T. ; Zafeiropoulos, S.

2022
SISSA Trieste

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Please use a persistent id in citations: doi:10.22323/1.430.0368  doi:10.3204/PUBDB-2022-08162

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

Note: 10 pages, 4 figures, 1 table, to be published in Proceedings of Science, contribution to 'The 39th International Symposium on Lattice Field Theory (LATTICE 2022)'

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Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Bruno, M.Extern* ; Cè, M. ; Francis, A. (Corresponding author) ; Green, J. R.DESY* ; Hansen, M. T. ; Zafeiropoulos, S.
Translating topological benefits in very cold lattice simulations
[10.3204/PUBDB-2022-07841]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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