Efficient simulation of relativistic fermions via vertex models

Details Efficient simulation of relativistic fermions via vertex models Efficient simulation of relativistic fermions via vertex models

2008-12-18

arxiv.org/abs/0812.3565v1

Phys.Rev.D80:071503,2009

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 4 figures

Scientific paper

10.1103/PhysRevD.80.071503

We have developed an efficient simulation algorithm for strongly interacting relativistic fermions in two-dimensional field theories based on a formulation as a loop gas. The loop models describing the dynamics of the fermions can be mapped to statistical vertex models and our proposal is in fact an efficient simulation algorithm for generic vertex models in arbitrary dimensions. The algorithm essentially eliminates critical slowing down by sampling two-point correlation functions and it allows simulations directly in the massless limit. Moreover, it generates loop configurations with fluctuating topological boundary conditions enabling to simulate fermions with arbitrary periodic or anti-periodic boundary conditions. As illustrative examples, the algorithm is applied to the Gross-Neveu model and to the Schwinger model in the strong coupling limit.

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