Flow-based sampling in the lattice Schwinger model at criticality
Michael S. Albergo, Denis Boyda, K. Cranmer, Daniel C. Hackett, Gurtej Kanwar, Sébastien Racanière, Danilo Jimenez Rezende, Fernando Romero-López, Phiala E. Shanahan, Julian M. Urban
Abstract
Recent results suggest that flow-based algorithms may provide efficient sampling of field distributions for lattice field theory applications, such as studies of quantum chromodynamics and the Schwinger model. In this work, we provide a numerical demonstration of robust flow-based sampling in the Schwinger model at the critical value of the fermion mass. In contrast, at the same parameters, conventional methods fail to sample all parts of configuration space, leading to severely underestimated uncertainties.
Topics & Concepts
CriticalityLattice (music)Sampling (signal processing)Statistical physicsQuantum field theoryLattice QCDFlow (mathematics)Lattice field theoryQuantum chromodynamicsPhysicsMathematicsComputer scienceParticle physicsMechanicsQuantum mechanicsAcousticsNuclear physicsDetectorOpticsQuantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions Research