摘要
本文以非平衡系统的规格化模型为基础,定义了一般非平衡系统局域序参量涨落的空时相关函数,导出了该相关函数在非平衡相变临界点邻域的具体形式,得到了其相应的空间相关长度ξ和相关弛豫时间T_k以及彼此的关系,并讨论了它们在临界点的行为趋向,同时得出长波慢化在非平衡临界起主要作用和长程相关是系统趋于有序化的决定因素的结论,在一定程度上揭示了形成宏观“巨涨落”的根源,描述了局域序参量涨落的临界行为。
On the basis of the standerdized model of nonequilibrium systems, a space-time correlation founction of fluctuations for local orderparpameter in general nonequilibrum systems was defined. It's specific form was derived in the critical point vicinity of nonequilibrmm phase transform. The space correlation length ξ and the correlative relaxation time T_k as well as their relation each other was obtained. Their behavior tendency was discussed at the critical point. The conclusions, that slowing-down of long wave mode play principal part in critical point of nonrquilibrium phase and that correlativity of long range is decisive factor for nonequilibrium system tending to ordered, was achieved together. To a certain extent, sources of forming macroscopic 'large fluctuation' was reveaded, and behaviors of critical fluctuations for the local orderparameters was described.
出处
《贵州大学学报（自然科学版）》
1990年第3期161-170,共10页
Journal of Guizhou University:Natural Sciences
关键词
非平衡
临界
局域序参量
涨落
nonequilibrium critical point
local orderparameter
spacetime correlation founction
fluctuations
