arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1507.03552cond-mat.stat-mech
收藏

精确可解概率元胞自动机的谱隙和动力学临界指数

The spectral gap and the dynamical critical exponent of an exact solvable probabilistic cellular automaton

M. J. Lazo, A. A. Ferreira, F. C. Alcaraz

摘要:

本文给出了正方形格子上六顶点模型的概率元胞自动机的精确解。该模型描述了蚂蚁(或粒子)的流动,在一维晶格上行进,其位置是包含睡眠或清醒蚂蚁(两种粒子)的小陨石坑。得到了元胞自动机时间演化算子的Bethe方程和谱隙。从谱隙,我们表明,在不对称的情况下,它属于Kardar-Parisi-Zhang(KPZ)普适类,表现出动力学临界指数值$z=\frac{3}{2}$。这一结果也是从直接的蒙特卡罗模拟,通过评估的晶格尺寸的依赖性的衰变时间的稳态。

英文摘要:

We obtained the exact solution of a probabilistic cellular automaton related to the diagonal-to-diagonal transfer matrix of the six-vertex model on a square lattice. The model describes the flow of ants (or particles), traveling on a one-dimensional lattice whose sites are small craters containing sleeping or awake ants (two kinds of particles). We found the Bethe ansatz equations and the spectral gap for the time-evolution operator of the cellular automaton. From the spectral gap we show that in the asymmetric case it belongs to the Kardar-Parisi-Zhang (KPZ) universality class, exhibiting a dynamical critical exponent value $z=\frac{3}{2}$. This result is also obtained from a direct Monte Carlo simulation, by evaluating the lattice-size dependence of the decay time to the stationary state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑