1-3 August 2016
Plymouth University
Europe/London timezone
The 14th International workshop on QCD in extreme conditions, Aug. 1-3 2016

Lattice QED with dual variables

2 Aug 2016, 10:10
Portland Square (Plymouth University)

Portland Square

Plymouth University

Drake Circus Plymouth, Devon PL4 8AA, UK
Talk Quantum Field Theories of dense, cold matter Tuesday AM


Helvio Vairinhos (ETH Zurich)


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)


Dr Philippe de Forcrand (ETH Zurich & CERN)

Presentation Materials