title: Noise, sign problems, and statistics.
abstract: We show how sign problems in simulations of many-body systems can manifest themselves in the form of heavy-tailed correlator distributions, similar to what is seen in electron propagation through disordered media. We propose an alternative statistical approach for extracting ground state energies in such systems, illustrating the method with a toy model and with lattice data for unitary fermions.
authors.affiliation: Theoretical Research Division, RIKEN Nishina Center, Wako, Saitama, Japan. endres@riken.jp
authors.forename: Michael G
authors.initials: MG
authors.lastname: Endres
authors.forename: David B
authors.initials: DB
authors.lastname: Kaplan
authors.forename: Jong-Wan
authors.initials: JW
authors.lastname: Lee
authors.forename: Amy N
authors.initials: AN
authors.lastname: Nicholson