一类局域一维非公度体系的量子扩散

QUANTUM DIFFUSION IN ONEDIMENSIONAL INCOMMENSURATE SYSTEMS

研究一类局域一维非公度体系（格点势能ｕｉ＝λｔａｎ（２πδｉ），其中δ＝（５－１）／２）的量子扩散，分析了自关联函数Ｃ（ｔ）在不同哈密顿量参数区域的长时特征，发现电子在整个体系中是不扩散的，自关联函数Ｃ（ｔ）～ｔ０．

In this paper, we study the quantum diffusion in onedimensional incommensurate systems( u i=λ tan (2πδi),δ =(5-1)/2).Attention is paid to the analysis of longtime behavior of the autocorrelation function C(t) ,which show that the electrons are indiffusion and C(t)～t 0 .