摘要
提出了描述电子－光子－声子相互作用系统的相对论协变形的Ｌａｇｒａｎｇｅ量，给出了系统的能量、动量、角动量；相互作用系统Ｌａｇｒａｎｇｅ量是奇异的，根据Ｄｉｒａｃ理论，导出了系统的规范变换生成元，给出了系统的Ｆ－Ｓ路径积分量子化以及相空间Ｇｒｅｅｎ函数生成泛函；并应用场论中的Ｇｒｅｅｎ函数方法，给出了系统的粒子分布函数．
A Lagrangian in relativestic covariant formalism which desctibes theinteraction system of electrons-photon-phonon is proposed. The expressions are obtainedfor energy, momentum and angular momentum of the system. This Lagrangian issingular in sense of Dirac. The Faddeev-Senjanovic path-integral quanhzation of thissystem is performed. The generator for gauge transformation of this system is derived.The phase-space generating functional of the Green function of this system is deduced.Applying the Green function approach in field theory, we get energy spectrum andparticle distribution function.
出处
《北京工业大学学报》
CAS
CSCD
1999年第2期103-109,共7页
Journal of Beijing University of Technology
关键词
相互作用系统
量子场论
电子
光子
声子
interacting system, quantum fields theory methods, Green function
