相空间中Green函数的生成泛函和Feynman规则  

The Generating Functional of Green Function in Phase Space and Feynman's Rule

作　　者：李子平[1] 

机构地区：[1]北京工业大学应用物理系

出　　处：《北京工业大学学报》1995年第3期12-17,共6页Journal of Beijing University of Technology

基　　金：国家自然科学基金;北京市自然科学基金

摘　　要：从相空间中Ｇｒｅｅｎ函数的生成泛函出发，对正则动量引入外源，利用最陡下降法，证明了在树图近似下，正规顶角的生成泛函等于正则作用量。勿需作出对正则动量的泛函积分，就可导出树图近似下的Ｆｅｙｎｍａｎ规则，给出了对ψ４场论中的初步应用。On Starting from the generating functional of Green function in phase space and introducing exterior sources for canonical momenta, it turns out that the generating functional of proper vertices is equal to canonical action in tree approximation. The Feyman's rule for the theory in this approximation can be deduced without carrying out explicit functional integration over canonical momenta.A preliminary application for ψ4-field theory is introduced.

关 键 词：生成泛函 FEYNMAN规则 相空间 格林函数 

分 类 号：O413[理学—理论物理]