Dynamical overlap fermions with increased topological tunnelling
High Energy Physics - Lattice
2009-04-14 v1
Abstract
We present two improvements to our previous dynamical overlap HMC algorithm. We introduce a new method of differentiating the eigenvectors of the Kernel operator, which removes an instability in the fermionic force. Secondly, by simulating part of the fermion determinant exactly, without pseudo-fermions, we are able to increase the rate of topological tunnelling by a factor of more than ten, reducing the auto-correlation.
Cite
@article{arxiv.0710.1785,
title = {Dynamical overlap fermions with increased topological tunnelling},
author = {N. Cundy and S. Krieg and T. Lippert and A Schaefer},
journal= {arXiv preprint arXiv:0710.1785},
year = {2009}
}
Comments
7 pages, contribution to lattice 2007 (algorithms)