量子散射自由Green函数的计算  

Calculation of the free Green's function in quantum scattering

作　　者：王琴惠[1] 

机构地区：[1]华南理工大学应用物理系,广东广州510641

出　　处：《纺织高校基础科学学报》2004年第2期128-130,共3页Basic Sciences Journal of Textile Universities

摘　　要：用绕过极点和移动极点两种方法计算了量子散射自由Green函数.研究表明,选择不同的绕过极点的积分路径去计算Green函数将得到相同的结果,而且两种计算方法是不等价的.移动极点的计算方法是计算Green函数的正确可行的方法,而绕过极点的计算方法则不应采用.The free Green's function in quantum scattering is calculated by using the two kinds of methods of bypassing and removing the limit points.It is shown that the calculative results by selecting the different integral paths of bypassing the limit points are the same,the two kinds of calculative methods aren't of equal value,the calculative method of removing the limit points is the right and feasible method to calculate the Green's function,but the calculative method of bypassing the limit points should not be used.

关 键 词：GREEN函数 量子散射 积分路径 极点 

分 类 号：O413.1[理学—理论物理]