A variant approach to the overlap action

Abstract

I describe an implementation of the overlap action, which is built from an action which is itself an approximate overlap action. It appears to be about a factor of 15-20 less expensive to use, than the usual overlap action with the Wilson fermion action as its kernel. Ingredients include a fat link to suppress coupling to dislocations and a free field action with a spectrum which resembles an overlap; much of the gain comes from the use of eigenmodes of the approximate action to begin the overlap calculation. As a physics example, I compute the quark condensate in finite volume in the quenched approximation.

15 pages, Revtex, postscript figures. COLO-HEP-446

References in corpus (4)

• Finite-size scaling of the quark condensate in quenched lattice QCD
• Chiral Condensate in the Deconfined Phase of Quenched Gauge Theories
• Chiral fermions on the lattice
• Perturbation Theory for Fat-link Fermion Actions

Cited by in corpus (67)

• Flavor Symmetry and the Static Potential with Hypercubic Blocking
• Infinite N phase transitions in continuum Wilson loop operators
• Hypercubic Smeared Links for Dynamical Fermions
• Numerical techniques for lattice QCD in the $\epsilon$--regime
• Staggered eigenvalue mimicry
• Large N reduction in the continuum three dimensional Yang-Mills theory
• Does the crossover from perturbative to nonperturbative physics in QCD become a phase transition at infinite N ?
• Testing the fixed-point QCD action and the construction of chiral currents
• Quenched spectroscopy with fixed-point and chirally improved fermions
• Improving meson two-point functions in lattice QCD
• Scaling tests with dynamical overlap and rooted staggered fermions
• Precision study of the SU(3) topological susceptibility in the continuum
• Finite-size scaling tests for SU(3) lattice gauge theory with color sextet fermions
• Low-lying fermion modes, topology and light hadrons in quenched QCD
• Light Quark Masses with Overlap Fermions in Quenched QCD
• Non-perturbative renormalization of the quark condensate in Ginsparg-Wilson regularizations
• Physics issues in simulations with dynamical overlap fermions
• Short distance current correlators: Comparing lattice simulations to the instanton liquid
• Finite-size Scaling of Meson Propagators
• Hybrid Monte Carlo with Fat Link Fermion Actions
• Kaon B Parameter in Quenched QCD
• Finite-Size Scaling of Vector and Axial Current Correlators
• Localization properties of lattice fermions with plaquette and improved gauge actions
• Accelerated Overlap Fermions
• Witten-Veneziano Relation, Quenched QCD, and Overlap Fermions
• Filtered overlap: speedup, locality, kernel non-normality and Z_A~1
• Parameters of the lowest order chiral Lagrangian from fermion eigenvalues
• One loop matching coefficients for a variant overlap action--and some of its simpler relatives
• Locality and topology with fat link overlap actions
• Convergence Rate and Locality of Improved Overlap Fermions
• On the renormalized scalar density in quenched QCD
• Overlap Hypercube Fermions in QCD Simulations Near the Chiral Limit
• Are Topological Charge Fluctuations in QCD Instanton Dominated?
• Diquark effects in light baryon correlators from lattice QCD
• A strategy to study the role of the charm quark in explaining the Delta{I}=1/2 rule
• New spectral representation and evaluation of f_πand the quark condensate <\bar q q> in the terms of string tension
• Eigenvalue Decomposition of Meson Correlators
• Probing the fuzzy sphere regularisation in simulations of the 3d λϕ^4 model
• Comment on ``Evidence Against Instanton Dominance of Topological Charge Fluctuations in QCD''
• Analysis of the DeltaI=1/2 Rule and e'/e with Overlap Fermions
• Lattice 2001: Reflections
• Evaluating the Fermionic Determinant of Dynamical Configurations
• Schwinger Model with the Overlap-Dirac Operator: exact results versus a physics motivated approximation
• Another determination of the quark condensate from an overlap action
• Quenched Results for Light Quark Physics with Overlap Fermions
• Simulation of dynamical fermions with smeared links
• Radiative contribution to the effective potential in composite Higgs models from lattice gauge theory
• The FLIC Overlap Quark Propagator
• Exploring Topology Conserving Gauge Actions for Lattice QCD
• Dynamical fermions as a global correction
• Recent results from systematic parameterizations of Ginsparg-Wilson fermions
• Suppressing dislocations in normalized hypercubic smearing
• First results from a parametrized Fixed-Point QCD action
• Large N reduction on a twisted torus
• Chiral properties of domain-wall fermions from eigenvalues of 4 dimensional Wilson-Dirac operator
• Renormalization of Bilinear Quark Operators for Overlap Fermions
• Mixed Action Simulations on Staggered Background; Interpretation and Result for the 2-flavor QCD Chiral Condensate
• Reweighting QCD simulations with dynamical overlap fermions
• Physics prospects of UV-filtered overlap quarks
• Speed and Adaptability of Overlap Fermion Algorithms
• The complete lowest order chiral Lagrangian from a little box
• Stout-link smearing in lattice fermion actions
• The one-flavor quark condensate and related problems
• Kaon B-parameter using Overlap Fermions
• Analysis of finite temperature phase transition using level spacing
• Dynamical fermions in lattice quantum chromodynamics
• Localization and lattice fermions