Monte Carlo simulations of the CP3 model and U(1) gauge theory in the presence of a theta-term
Jan C. Plefka, Stuart Samuel
Abstract
A theta-term, which couples to topological charge, is added to the two-dimensional lattice CP3 model and U(1) gauge theory. Monte Carlo simulations are performed and compared to strong-coupling character expansions. In certain instances, a flattening behavior occurs in the free-energy at sufficiently large theta, but the effect is an artifact of the simulation methods.
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