ISSN:
1572-9613
Keywords:
Diffusion
;
Lorentz lattice gas
;
cellular automata
;
honeycomb lattice
;
quasi-lattice
;
square lattice
;
triangular lattice
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We study numerically the nature of the diffusion process on a honeycomb and a quasi-lattice, where a point particle, moving along the bonds of the lattice, scatters from randomly placed scatterers on the lattice sites according to strictly deterministic rules. For the honeycomb lattice fully occupied by fixed rotators two (symmetric) isolated critical points appear to be present, with the same hyperscaling relation as for the square and the triangular lattices. No such points appear to exist for the quasi-lattice. A comprehensive comparison is made with the behavior on the previously studied square and triangular lattices. A great variety of diffusive behavior is found, ranging from propagation, superdiffusion, normal, quasi-normal, and anomalous, to absence of diffusion. The influence of the scattering rules as well as of the lattice structure on the diffusive behavior of a point particle moving on the all lattices studied so far is summarized.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02179989
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