Calculations of QED Effects with the Dirac Green Function

Symmetry

AnnaV. Maiorova¹  VladimirA. Yerokhin¹ 

[1] Center for Advanced Studies, Peter the Great St. Petersburg Polytechnic University, Polytekhnicheskaya 29, 195251 St. Petersburg, Russia;

关键词: lamb shift;    self-energy;    Dirac Green function;    electron propagator;   

DOI  :  10.3390/sym12050800

来源: DOAJ

【 摘 要 】

Modern spectroscopic experiments in few-electron atoms reached the level of precision at which an accurate description of quantum electrodynamics (QED) effects is mandatory. In many cases, theoretical treatment of QED effects need to be performed without any expansion in the nuclear binding strength parameter $Z\alpha$ (where Z is the nuclear charge number and $\alpha$ is the fine-structure constant). Such calculations involve multiple summations over the whole spectrum of the Dirac equation in the presence of the binding nuclear field, which can be evaluated in terms of the Dirac Green function. In this paper we describe the technique of numerical calculations of QED corrections with the Dirac Green function, developed in numerous investigations during the last two decades.

【 授权许可】

Unknown