Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.1k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.9k papers
- University of California, RiversideUS1.9k papers
- University of VirginiaUS1.8k papers
- Rice UniversityUS1.8k papers
- Fermi National Accelerator LaboratoryUS1.8k papers
- Princeton UniversityUS1.8k papers
- Charles UniversityCZ1.8k papers
- University of Maryland, College ParkUS1.7k papers
- Tata Institute of Fundamental ResearchIN1.7k papers
- University of Notre DameUS1.7k papers
20 papers · 2 filters
Random Matrix Theory and Dirac Spectrum at Nonzero Temperature and Density
Bernd A. Berg, Harald Markum, Rainer Pullirsch +1
We investigate the eigenvalue spectrum of the staggered Dirac matrix in SU(3) gauge theory and in full QCD as well as in quenched U(1) theory on various lattice sizes. As a measure…
First experiences with HMC for dynamical overlap fermions
Achim Bode, Urs M. Heller, Robert G. Edwards +1
We describe an HMC algorithm for dynamical overlap fermions which makes use of their good chiral properties. We test the algorithm in the Schwinger model. Topological sectors are r…
Topology and Chiral Symmetry in QCD with Overlap Fermions
Robert G. Edwards, Urs M. Heller, Joe Kiskis +1
We briefly review the overlap formalism for chiral gauge theories, the overlap Dirac operator for massless fermions and its connection to domain wall fermions. We describe properti…
Scaling tests of the improved Kogut-Susskind quark action
The MILC collaboration, C. Bernard, T. Burch +8
Improved lattice actions for Kogut-Susskind quarks have been shown to improve rotational symmetry and flavor symmetry. In this work we find improved scaling behavior of the rho and…
Two Loop Computation of the Schroedinger Functional in Lattice QCD
Achim Bode, Peter Weisz, Ulli Wolff
We compute the Schroedinger functional (SF) for the case of lattice QCD with Wilson fermions (with and without SW improvement) at two-loop order in lattice perturbation theory. Thi…
Chiral Condensate in the Deconfined Phase of Quenched Gauge Theories
Robert G. Edwards, Urs M. Heller, Joe Kiskis +1
We compute the low lying spectrum of the overlap Dirac operator in the deconfined phase of finite-temperature quenched gauge theory. It suggests the existence of a chiral condensat…
First Signs for String Breaking in Two-Flavor QCD
Carleton DeTar, Urs Heller, Pierre Lacock
We have been examining the phenomenon of string breaking in QCD with two flavors of dynamical staggered quarks. We construct a transfer matrix from a combination of ``string'' and…
Overlap Dirac Operator, Eigenvalues and Random Matrix Theory
Robert G. Edwards, Urs M. Heller, Joe Kiskis +1
The properties of the spectrum of the overlap Dirac operator and their relation to random matrix theory are studied. In particular, the predictions from chiral random matrix theory…
Looking for Effects of Topology in the Dirac Spectrum of Staggered Fermions
P. H. Damgaard, U. M. Heller, R. Niclasen +1
We classify SU(3) gauge field configurations in different topological sectors by the smearing technique. In each sector we compute the distribution of low lying eigenvalues of the…
Finite-Volume Scaling of the Quenched Chiral Condensate
P. H. Damgaard, R. G. Edwards, U. M. Heller +1
In the large-volume limit with the mass-dependent chiral condensate is predicted to satisfy exact finite-volume scaling laws that fall into three major…
Improved Landau Gauge Fixing and Discretisation Errors
F. D. R. Bonnet, P. O. Bowman, D. B. Leinweber +2
Lattice discretisation errors in the Landau gauge condition are examined. An improved gauge fixing algorithm in which order a^2 errors are removed is presented. Order a^2 improveme…
U(1) staggered Dirac operator and random matrix
Bernd A. Berg, Harald Markum, Rainer Pullirsch +1
We investigate the spectrum of the staggered Dirac operator in 4d quenched U(1) lattice gauge theory and its relationship to random matrix theory. In the confined as well as in the…
Two loop lattice expansion of the Schroedinger functional coupling in improved QCD
A. Bode, P. Weisz, U. Wolff
The contributions of the improved fermion action of Sheikholeslami and Wohlert to the two loop coefficient of the expansion of the Schroedinger functional coupling in terms of the…
Critical Behavior in Nt = 4 Staggered Fermion Thermodynamics
C. Bernard, C. DeTar, S. Gottlieb +5
Quantum chromodynamics with two zero-mass flavors is expected to exhibit a phase transition with O(4) critical behavior. Fixing the universality class is important for phenomenolog…
Staggered Fermions and Gauge Field Topology
P. H. Damgaard, U. M. Heller, R. Niclasen +1
Based on a large number of smearing steps, we classify SU(3) gauge field configurations in different topological sectors. For each sector we compare the exact analytical prediction…
Discretisation Errors in Landau Gauge on the Lattice
F. D. R. Bonnet, P. O. Bowman, D. B. Leinweber +2
Lattice discretisation errors in the Landau gauge condition are examined. An improved gauge fixing algorithm in which errors are removed is presented. ${\cal O}(a^2…
Thermodynamics with Dynamical Clover Fermions
Robert G. Edwards, Urs M. Heller
We investigate the finite temperature behavior of nonperturbatively improved clover fermions on lattices with temporal extent N_t=4 and 6. Unfortunately in the gauge coupling range…
Small eigenvalues of the staggered Dirac operator in the adjoint representation and Random Matrix Theory
Robert G. Edwards, Urs M. Heller, Rajamani Narayanan
The low-lying spectrum of the Dirac operator is predicted to be universal, within three classes, depending on symmetry properties specified according to random matrix theory. The t…
Approach to the Continuum Limit of the Quenched Hermitian Wilson-Dirac Operator
Robert G. Edwards, Urs M. Heller, Rajamani Narayanan
We investigate the approach to the continuum limit of the spectrum of the Hermitian Wilson-Dirac operator in the supercritical mass region for pure gauge SU(2) and SU(3) background…
Improved Staggered Fermion Actions for QCD Thermodynamics
U. M. Heller, F. Karsch, B. Sturm
We analyze the cut-off dependence of the fermion contribution to the finite temperature free energy density in lattice perturbation theory for several improved stag…