Green's function Monte Carlo study of correlation functions in the (2+1)-dimensional U(1) lattice gauge theory - art. no. 054511

A "forward walking" quantum Monte Carlo algorithm has been developed to cal culate correlation functions for the Hamiltonian lattice formulation of U(1 ) Yang-Mills theory in 2+1 dimensions. It is shown that Wilson loops can he calculated with high accuracy. Creutz ratios are used to determine the str ing tension, which agrees with results from other approaches. Timelike corr elations are used to estimate the mass gaps, which agree with series expans ion results in the strong coupling regime.