We study the spectral gap of the Wilson--Dirac operator in two-flavour lattice QCD as a function of the lattice spacing $a$, the space-time volume $V$ and the current-quark mass $m$. It turns out that the median of the probability distribution of the gap scales proportionally to $m$ and that its width is practically equal to $a/sqrt{V}$. In particular, numerical simulations are safe from accidental zero modes in the large-volume regime of QCD.

Del Debbio, L., Giusti, L., Luscher, M., Petronzio, R., Tantalo, N. (2006). Stability of lattice QCD simulations and the thermodynamic limit. JOURNAL OF HIGH ENERGY PHYSICS, 0602, 011 [10.1088/1126-6708/2006/02/011].

Stability of lattice QCD simulations and the thermodynamic limit

GIUSTI, LEONARDO;
2006

Abstract

We study the spectral gap of the Wilson--Dirac operator in two-flavour lattice QCD as a function of the lattice spacing $a$, the space-time volume $V$ and the current-quark mass $m$. It turns out that the median of the probability distribution of the gap scales proportionally to $m$ and that its width is practically equal to $a/sqrt{V}$. In particular, numerical simulations are safe from accidental zero modes in the large-volume regime of QCD.
Articolo in rivista - Articolo scientifico
field theory, gauge theory, lattice
English
2006
0602
011
none
Del Debbio, L., Giusti, L., Luscher, M., Petronzio, R., Tantalo, N. (2006). Stability of lattice QCD simulations and the thermodynamic limit. JOURNAL OF HIGH ENERGY PHYSICS, 0602, 011 [10.1088/1126-6708/2006/02/011].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/24693
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