38 citations · 66 across the 6 of their papers we have counts for
6 papers
Topological tunneling with Dynamical overlap fermions
Nigel Cundy, Stefan Krieg, Thomas Lippert +1
Tunneling between different topological sectors with dynamical chiral fermions is difficult because of a poor mass scaling of the pseudo-fermion estimate of the determinant. For sm…
Improving the dynamical overlap algorithm
N. Cundy, S. Krieg, Th. Lippert
We present algorithmic improvements to the overlap Hybrid Monte Carlo algorithm, including preconditioning techniques and improvements to the correction step, used when one of the…
Numerical Methods for the QCD Overlap Operator IV: Hybrid Monte Carlo
N. Cundy, S. Krieg, G. Arnold +3
The extreme computational costs of calculating the sign of the Wilson matrix within the overlap operator have so far prevented four dimensional dynamical overlap simulations on rea…
Dynamical overlap simulations using HMC
N. Cundy, S. Krieg, A. Frommer +2
We apply the Hybrid Monte Carlo method to the simulation of overlap fermions. We give the fermionic force for the molecular dynamics update. We present early results on a small dyn…
Improving Inversions of the Overlap Operator
S. Krieg, N. Cundy, J. van den Eshof +3
We present relaxation and preconditioning techniques which accelerate the inversion of the overlap operator by a factor of four on small lattices, with larger gains as the lattice…
Numerical Methods for the QCD Overlap Operator: II. Optimal Krylov Subspace Methods
G. Arnold, N. Cundy, J. van den Eshof +4
We investigate optimal choices for the (outer) iteration method to use when solving linear systems with Neuberger's overlap operator in QCD. Different formulations for this operato…