Dual representation for massless fermions with chemical potential and U(1) gauge fields
Abstract
Complex action problems coming from either a chemical potential or a topological term have been solved for several models in recent years by mapping them to so-called dual degrees of freedom. In terms of these dual variables the partition sum has only real and positive contributions such that a Monte Carlo simulation is possible. In this paper we discuss a dual representation for massless staggered fermions in two dimensions coupled to a U(1) gauge field. We include a topological term, and for the case of several flavors with vanishing total charge also a chemical potential. We show that the real and positive dualization can also be generalized to a system of nanowires (1+1 dimensional fermions) coupled to a 3+1 dimensional U(1) gauge field.
Keywords
Cite
@article{arxiv.1512.00995,
title = {Dual representation for massless fermions with chemical potential and U(1) gauge fields},
author = {Christof Gattringer and Thomas Kloiber and Vasily Sazonov},
journal= {arXiv preprint arXiv:1512.00995},
year = {2015}
}
Comments
PoS(LATTICE 2015)195