ar X iv : h ep - l at / 9 51 20 32 v 2 1 3 A ug 1 99 6 BUTP – 95 / 18 Fixed point action and topology in the CP 3 model
نویسنده
چکیده
We define a fixed point action in two-dimensional lattice CP models. The fixed point action is a classical perfect lattice action, which is expected to show strongly reduced cutoff effects in numerical simulations. Furthermore, the action has scale-invariant instanton solutions, which enables us to define a correct topological charge without topological defects. Using a parametrization of the fixed point action for the CP model in a Monte Carlo simulation, we study the topological susceptibility. 11.15.Ha 75.10.Hk 11.10.Hi Typeset using REVTEX 1
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تاریخ انتشار 1996