Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2009-04-06
Physics
Condensed Matter
Disordered Systems and Neural Networks
I include 16 figures. This paper is submited to Phys. Rev. B
Scientific paper
Role of range of interactions in a model of charged particles diffusing on a two-dimensional lattice is studied. We investigate, via Monte Carlo simulations, three models. In the first one interactions are restricted to nearest neighbors, in the second one we add (weaker) interactions to second nearest neighbors. In the third model interactions are extended as far as the half the size of the system. The strength of these interactions falls off with the distance. We show that for static properties, such as asymptotic spatial patterns or the order parameter, the results of the first and third models are very close. Dynamic characteristics, like mean square displacement, average cluster size and average energy as functions of time show larger differences among the three models. Origins of these differences are pointed out and discussed.
Pawlikowski Krzysztof
Pekalski Andrzej
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