Statistics of layered zigzags: a two-dimensional generalization of TASEP

Abstract

A novel discrete growth model in 2+1 dimensions is presented in three equivalent formulations: i) directed motion of zigzags on a cylinder, ii) interacting interlaced TASEP layers, and iii) growing heap over 2D substrate with a restricted minimal local height gradient. We demonstrate that the coarse-grained behavior of this model is described by the two-dimensional Kardar-Parisi-Zhang equation. The coefficients of different terms in this hydrodynamic equation can be derived from the steady state flow-density curve, the so called `fundamental' diagram. A conjecture concerning the analytical form of this flow-density curve is presented and is verified numerically.

5 pages, 4 figures

References in corpus (2)

• Burgers Turbulence
• Tagged Particle Correlations in the Asymmetric Simple Exclusion Process: Finite Size Effects

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