THE MASS GAP IN 2+1 DIMENSIONAL U(1) LATTICE GAUGE THEORY
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Abstract
We present a variational calculation of the mass gap in 2+1 dimensional U(1) lattice gauge theory using a hamiltonian of which the ground state is exactly known. An exponentially decreasing curve for ma us 1/g2 is obtained, but the slope is much larger than that predicted in the periodic Gaussian model.
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