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Sign problems, noise, and chiral symmetry breaking in a QCD-like theory

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arxiv 1208.5760 v2 pith:IETCSWO4 submitted 2012-08-28 hep-lat hep-phnucl-th

classification hep-lathep-phnucl-th
keywords distributionfindsformulationsmodelsignamenableanalyticallybreaking
verification ladder T0 review T1 audit T2 compute T3 formal
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The Nambu-Jona-Lasinio model reduced to 2+1 dimensions has two different path integral formulations: at finite chemical potential one formulation has a severe sign problem similar to that found in QCD, while the other does not. At large N, where N is the number of flavors, one can compute the probability distributions of fermion correlators analytically in both formulations. In the former case one finds a broad distribution with small mean; in the latter one finds a heavy tailed positive distribution amenable to the cumulant expansion techniques developed in earlier work. We speculate on the implications of this model for QCD.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Empirical investigation of nuclear correlation function distributions in lattice QCD

    hep-lat 2025-08 conditional novelty 6.0 of 10

    The distribution of lattice QCD nuclear correlation function samples is well described by O(N) model distributions with fitted N approximately 2/B at large time separations.

  2. Determining universal spectra from probability distributions

    nucl-th 2026-06 unverdicted novelty 3.0 of 10

    Exploratory refinement of universal n-body spectra predictions using probability distributions of correlation functions via lattice methods and analytic expansions.

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