New proposal for numerical simulations of theta-vacuum like systems

Abstract

We propose a new approach to perform numerical simulations of theta-vacuum like systems, test it in two analytically solvable models, and apply it to CP^3. The main new ingredient in our approach is the method used to compute the probability distribution function of the topological charge at theta=0. We do not get unphysical phase transitions (flattening behavior of the free energy density) and reproduce the exact analytical results for the order parameter in the whole theta-range within a few percent.

4 pages, RevTex4, minor changes and some references added

References in corpus (1)

• CP(N-1) Models with Theta Term and Fixed Point Action

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