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Elucidating the sign problem through noise distributions
Amy N. Nicholson, Dorota Grabowska, David B. Kaplan
Due to the presence of light pions in the theory, lattice QCD at finite densities suffers from issues with noise in both grand canonical and canonical formulations. We study two di…
Sign problems, noise, and chiral symmetry breaking in a QCD-like theory
Dorota Grabowska, David B. Kaplan, Amy N. Nicholson
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…
Lattice Monte Carlo calculations for unitary fermions in a finite box
Michael G. Endres, David B. Kaplan, Jong-Wan Lee +1
We perform lattice Monte Carlo simulations for up to 66 unitary fermions in a finite box using a highly improved lattice action for nonrelativistic spin 1/2 fermions. We obtain a v…