Speaker
Helvio Vairinhos
(ETH Zurich)
Description
With the help of auxiliary fields, it is possible to integrate out analytically the link variables in lattice gauge theory with staggered fermions, for arbitrary values of the lattice coupling. In the case of N_f=1 QED, the subsequent Grassmann integration yields a dual representation of the partition function, which traces over an ensemble of monomers, dimers, and electron loops coupled to the auxiliary fields. We simulate this system using diagrammatic Monte Carlo methods, and explore the residual sign problem which survives after all the analytical integrations.
Primary author
Helvio Vairinhos
(ETH Zurich)
Co-author
Dr
Philippe de Forcrand
(ETH Zurich & CERN)
