Directed d-mer diffusion describing Kardar-Parisi-Zhang type of surface growth

Details Directed d-mer diffusion describing Kardar-Parisi-Zhang type of surface growth Directed d-mer diffusion describing Kardar-Parisi-Zhang type of surface growth

2009-07-19

arxiv.org/abs/0907.3297v2

Phys. Rev. E 81, 031112 (2010)

Physics

Condensed Matter

Statistical Mechanics

Revised version, to appear in PRE. 7 pages, 4 figures, 1 Table

Scientific paper

10.1103/PhysRevE.81.031112

We show that d+1-dimensional surface growth models can be mapped onto driven lattice gases of d-mers. The continuous surface growth corresponds to one dimensional drift of d-mers perpendicular to the (d-1)-dimensional "plane" spanned by the d-mers. This facilitates efficient, bit-coded algorithms with generalized Kawasaki dynamics of spins. Our simulations in d=2,3,4,5 dimensions provide scaling exponent estimates on much larger system sizes and simulations times published so far, where the effective growth exponent exhibits an increase. We provide evidence for the agreement with field theoretical predictions of the Kardar-Parisi-Zhang universality class and numerical results. We show that the (2+1)-dimensional exponents conciliate with the values suggested by Lassig within error margin, for the largest system sizes studied here, but we can't support his predictions for (3+1)d numerically.

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