Abstract
Using the improved lattice gauge field Hamiltonian and the truncated eigenvalue equation method, we compute the vacuum wave function and mass gap of three-dimensional SU(2) gauge field theory. Our results show that the improved theory leads to a significant reduction of violation of scaling, that is, using the improved lattice gauge field Hamiltonian, the calculations can be carried out up to a much weaker coupling region than using the unimproved one, with good scaling behavior.
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