268 citations · 2.5k across the 83 of their papers we have counts for
74 papers · 1 filter
Filtered Rayleigh-Ritz is all you need
Ryan Abbott, Daniel C. Hackett, George T. Fleming +2
Recent work has shown that the (block) Lanczos algorithm can be used to extract approximate energy spectra and matrix elements from (matrices of) correlation functions in quantum f…
Radial Lattice Quantization of 3D Field Theory
Richard C. Brower, George T. Fleming, Andrew D. Gasbarro +4
The quantum extension of classical finite elements, referred to as quantum finite elements ({\bf QFE})~\cite{Brower:2018szu,Brower:2016vsl}, is applied to the radial quantization o…
Stealth dark matter confinement transition and gravitational waves
R. C. Brower, K. Cushman, G. T. Fleming +11
We use non-perturbative lattice calculations to investigate the finite-temperature confinement transition of stealth dark matter, focusing on the regime in which this early-univers…
Automated label flows for excited states of correlation functions in lattice gauge theory
Kimmy K. Cushman, George T. Fleming
Extracting excited states from lattice gauge theory correlation functions can be achieved through chi-squared minimization fits or algebraic approaches such as the variational meth…
Lattice Gauge Theory for Physics Beyond the Standard Model
Richard C. Brower, Anna Hasenfratz, Ethan T. Neil +7
This document is one of a series of whitepapers from the USQCD collaboration. Here, we discuss opportunities for lattice field theory research to make an impact on models of new ph…
Prony methods for extracting excited states
Kimmy K. Cushman, George T. Fleming
We propose an algebraic method for extracting excited states from lattice gauge theory correlation functions. Instead of fitting to a sum of decaying exponentials, we adopt a varia…
Nonperturbative investigations of SU(3) gauge theory with eight dynamical flavors
Lattice Strong Dynamics, Collaboration, : +14
We present our lattice studies of SU(3) gauge theory with = 8 degenerate fermions in the fundamental representation. Using nHYP-smeared staggered fermions we study finite-tem…
Lattice Field Theory on Riemann Manifolds: Numerical Tests for the 2-d Ising CFT on
Richard C. Brower, Michael Cheng, George T. Fleming +4
We present a method for defining a lattice realization of the quantum field theory on a simplicial complex in order to enable numerical computation on a general Riemann manif…
Examining the Low Energy Dynamics of Walking Gauge Theory
Andrew D. Gasbarro, George T. Fleming
We report on an investigation into the low energy dynamics of walking gauge theory. Taking Yang Mills with eight flavors of fundamental fermions as an example, we discuss t…
Lattice Dirac Fermions on a Simplicial Riemannian Manifold
Richard C. Brower, George T. Fleming, Andrew D. Gasbarro +3
The lattice Dirac equation is formulated on a simplicial complex which approximates a smooth Riemann manifold by introducing a lattice vierbein on each site and a lattice spin conn…
Strongly interacting dynamics and the search for new physics at the LHC
Thomas Appelquist, Richard C. Brower, George T. Fleming +11
We present results for the spectrum of a strongly interacting SU(3) gauge theory with light fermions in the fundamental representation. Carrying out non-perturbative latt…
Quantum Finite Elements for Lattice Field Theory
Richard C. Brower, George Fleming, Andrew Gasbarro +3
Viable non-perturbative methods for lattice quantum field theories on curved manifolds are difficult. By adapting features from the traditional finite element methods (FEM) and Reg…
Improved Lattice Radial Quantization
Richard C. Brower, Michael Cheng, George T. Fleming
Lattice radial quantization was proposed in a recent paper by Brower, Fleming and Neuberger[1] as a nonperturbative method especially suited to numerically solve Euclidean conforma…
Composite bosonic baryon dark matter on the lattice: SU(4) baryon spectrum and the effective Higgs interaction
Thomas Appelquist, Evan Berkowitz, Richard C. Brower +16
We present the spectrum of baryons in a new SU(4) gauge theory with fundamental fermion constituents. The spectrum of these bosonic baryons is of significant interest for composite…
From Lattice Strong Dynamics to Phenomenology
George T. Fleming, Ethan T. Neil
We present updated results on the chiral properties of SU(3) gauge theories with 2 and 6 massless Dirac fermions in the fundamental representation. Our focus is on the ratio $\lang…
Lattice Gauge Theories at the Energy Frontier
Thomas Appelquist, Richard Brower, Simon Catterall +6
This White Paper has been prepared as a planning document for the Division of High Energy Physics of the U. S. Department of Energy. Recent progress in lattice-based studies of phy…
Lattice Radial Quantization: 3D Ising
Richard Brower, George Fleming, Herbert Neuberger
Lattice radial quantization is introduced as a nonperturbative method intended to numerically solve Euclidean conformal field theories that can be realized as fixed points of known…
Radial Quantization for Conformal Field Theories on the Lattice
Richard C. Brower, George T. Fleming, Herbert Neuberger
We consider radial quantization for conformal quantum field theory with a lattice regulator. A Euclidean field theory on is mapped to a cylindrical manifold, $\mathbb…
WW Scattering Parameters via Pseudoscalar Phase Shifts
Thomas Appelquist, Ron Babich, Richard C. Brower +15
Using domain-wall lattice simulations, we study pseudoscalar-pseudoscalar scattering in the maximal isospin channel for an SU(3) gauge theory with two and six fermion flavors in th…
Lattice Simulations and Infrared Conformality
Thomas Appelquist, George T. Fleming, Meifeng Lin +2
We examine several recent lattice-simulation data sets, asking whether they are consistent with infrared conformality. We observe, in particular, that for an SU(3) gauge theory wit…
Exploring strange nucleon form factors on the lattice
Ronald Babich, Richard C. Brower, Michael A. Clark +4
We discuss techniques for evaluating sea quark contributions to hadronic form factors on the lattice and apply these to an exploratory calculation of the strange electromagnetic, a…
Lattice study of ChPT beyond QCD
Ethan T. Neil, Adam Avakian, Ron Babich +10
We describe initial results by the Lattice Strong Dynamics (LSD) collaboration of a study into the variation of chiral properties of chiral properties of SU(3) Yang-Mills gauge the…
Nucleon form factors from high statistics mixed-action calculations with 2+1 flavors
LHPC Collaboration, Wolfram Schroers, Jonathan D. Bratt +16
We present new high-statistics results for nucleon form factors at pion masses of approximately 290, 350, 500, and 600 MeV using a mixed action of domain wall valence quarks on an…
Excited-State Effective Masses in Lattice QCD
George T. Fleming, Saul D. Cohen, Huey-Wen Lin +1
We apply black-box methods, i.e. where the performance of the method does not depend upon initial guesses, to extract excited-state energies from Euclidean-time hadron correlation…