Scaling topological charge in the CP model using a fixed point action
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 cut-off effects in numerical simulations. Furthermore, the action has scale invariant instanton solutions, which enables us to define a topological charge without topological defects. We present results for the scaling of the topological suceptibility from a Monte Carlo simulation in the CP model.
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تاریخ انتشار 1996