论文标题
QED封闭外壳系统中价孔激发的方法
QED approach to valence-hole excitation in closed shell systems
论文作者
论文摘要
在两次绿色函数方法的框架中开发了一种从头算的方法来治疗封闭壳系统中的价孔激发的方法。该推导将真空状态的重新定义及其激发作为价孔对。提出了适当的两次绿色功能，其光谱表示证实了价孔激发能的极点。还提供了连接能量校正和绿色功能的轮廓积分公式。在重新定义的真空图片中，明确得出了涉及自我能量，真空极化和一键交换项的价孔激发能的一阶校正。还要减少对BREIT近似同意的通常真空电子传播器，该传播物与价孔激发能的多体扰动理论表达式同意。
An ab initio QED approach to treat a valence-hole excitation in closed shell systems is developed in the framework of the two-time-Green function method. The derivation considers a redefinition of the vacuum state and its excitation as a valence-hole pair. The proper two-time Green function, whose spectral representation confirms the poles at valence-hole excitation energies is proposed. An contour integral formula which connects the energy corrections and the Green function is also presented. First-order corrections to the valence-hole excitation energy involving self-energy, vacuum polarization, and one-photon-exchange terms are explicitly derived in the redefined vacuum picture. Reduction to the usual vacuum electron propagators is given that agrees in the Breit approximation with the many-body perturbation theory expressions for the valence-hole excitation energy.
