【摘要】 引入平均自关联函数Ｃ（ｔ），研究了一维，二维，三维Ｆｉｂｏｎａｃｃｉ准晶的波包扩散性质．数值计算表明，Ｃ（ｔ）的长时行为按幂率衰减，即Ｃ（ｔ）～ｔ－δ．对于一维Ｆｉｂｏｎａｃｉ链，０＜δ＜１；对于高维Ｆｉｂｏｎａｃｉ准晶，随着格点势参数Ｖ的增大，存在一临界参数Ｖｃ．当０＜Ｖ＜Ｖｃ，δ＝１，电子的长时行为与周期体系一致：当Ｖ＞Ｖｃ，０＜δ＜１．更多还原

【Abstract】 The diffusion properties of wave packets in 1D,2D and 3D Fibonacci quasilattices (FQ) are studied by a site averaged autocorrelation function (t) .Numerical results show that the long time behavior of (t) exhibits (t)～t - .For 1D Fibonacci chain,0< [AKδ-] <1.However,for higher dimensional FQ,we find a crossover from [AKδ-] =1 to 0< <1 with increasing the modulation strength V .更多还原