5 papers · 1 filter
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…
Screening Lengths in SU(2) Gauge Theory at Finite Temperature
U. M. Heller, F. Karsch, J. Rank
We discuss the calculation of electric and magnetic screening masses in SU(2) gauge theory. The temperature dependence of these masses obtained from the long-distance behaviour of…
Reducing Discretization Errors in Lattice QCD Spectroscopy
Sara Collins, R. G. Edwards, U. M. Heller +1
The improved Wilson quark action - the clover action - is constructed to have smaller discretization errors than the normal Wilson quark action. We test this in a quenched spectros…
Compact U(1) Lattice Gauge-Higgs Theory with Monopole Suppression
Balasubramanian Krishnan, U. M. Heller, V. K. Mitrjushkin +1
We investigate a model of a U(1)-Higgs theory on the lattice with compact gauge fields but completely suppressed (elementary) monopoles. We study the model at two values of the qua…