非平衡相变系统相关函数的临界奇异性  

Critical Singularity of Correlation Function in Nonequilibrium Phase Transition Systems

作　　者：戴陵江[1] 蔡绍洪[1] 

机构地区：[1]贵州大学物理系,贵阳550025

出　　处：《贵州大学学报（自然科学版）》1998年第3期152-158,共7页Journal of Guizhou University:Natural Sciences

摘　　要：在非平衡相变系统规格化模型的基础上，考察了非平衡系统局域序参量涨落的相关函数．在非平衡相变临界点邻城内，导出了其空时相关函数的具体形式，并讨论了当系统趋于非平密相变临界点时，该相关函数的临界奇异行为，以及非平衡相变涨落的临界触发机理．由此看出相关函数的奇异性是导致非平衡系统临界巨涨落的根源．On the basis of the standardized model of nonequilibrium phase transformation, the correlation function of fluctuations for local orderparamenter in the system of nonequilibrium phase transition was studied. The concrete form of the space - time correlation function was derivred in the critical Point vicinity of nonequilibrium phase transition. It is be discussed that the critical singular behavior of the correlation function and the excitaticon mechanism of the critical large fluctuation in nonequilibrium phase transition, when it tend towards the critical point. It was showed that the critical singularity of the correlation function is the source of the critical large fluctuation in nonequilibrium systems.

关 键 词：非平衡相变 临界现象 相关函数 奇异行为 巨涨落 

分 类 号：O414.21[理学—理论物理]