Talk presented by Hiroshi Yoneyama

Parallel Session: Topology III

Thursday July 1st, 15.10 - 15.30, Room 6

Authors: R. Burkhalter, M. Imachi, S. Kanou and H. Yoneyama

CP(N-1) model and topological term

Abstract: Lattice CP($N-1$) model with topological term is computed. Topological charge distribution $P(Q)$, which is calculated by the set method, is transformed into the partition function $Z(theta)$ either directly or in fitted forms. These could lead to different behaviors of the free energy. We discuss characteristic behaviors of the model in the strong, intermediate and weak coupling regions in the ($beta$, $theta$)-plane. In order to refer to the continuum limit, we employ the fixed point action as well as the standard action and discuss the effect of an improvement of the action.

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