SIMULATION OF 2-DIMENSIONAL VORTEX DYNAMICS

The two-dimensional XY model is simulated with a time-dependent Ginzbu rg-Landau type dynamics. The data are, in the limit of small driving f orce, well described by the Minnhagen phenomenology for vortex dynamic s of a two-dimensional superfluid. This phenomenology is different and distinguishable from the conventional AHNS phenomenology. The Minnhag en phenomenology has been observed in recent experiments on Josephson- junction arrays and high-T(c) BSCCO films. The present simulations sug gest that this reflects an intrinsic property of the vortex dynamics f or a two-dimensional superfluid.