Triangular anisotropies in driven diffusive systems: Reconciliation of up and down
| Autor: | Chuck Yeung, Andrew D. Rutenberg |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
Statistical Mechanics (cond-mat.stat-mech) Field (physics) FOS: Physical sciences 16. Peace & justice 01 natural sciences 010305 fluids & plasmas 0103 physical sciences Point (geometry) Ising model Statistical physics 010306 general physics Anisotropy Condensed Matter - Statistical Mechanics Sign (mathematics) |
| Zdroj: | Physical Review E. 60:2710-2715 |
| ISSN: | 1095-3787 1063-651X |
| DOI: | 10.1103/physreve.60.2710 |
| Popis: | Deterministic coarse-grained descriptions of driven diffusive systems (DDS) have been hampered by apparent inconsistencies with kinetic Ising models of DDS. In the evolution towards the driven steady-state, ``triangular'' anisotropies in the two systems point in opposite directions with respect to the drive field. We show that this is non-universal behavior in the sense that the triangular anisotropy ``flips'' with local modifications of the Ising interactions. The sign and magnitude of the triangular anisotropy also vary with temperature. We have also flipped the anisotropy of coarse-grained models, though not yet at the latest stages of evolution. Our results illustrate the comparison of deterministic coarse-grained and stochastic Ising DDS studies to identify universal phenomena in driven systems. Coarse-grained systems are particularly attractive in terms of analysis and computational efficiency. 6 pages, 7 figures |
| Databáze: | OpenAIRE |
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