An electrodynamical coupled cluster (CC) formulation employing standard QED Hamiltonian that is written in Coulomb gauge and uses a multiconfiguration SCF picture of matter fields is discussed here. It employs a radiative cluster, matter clusters and their pair modifications, and considers a number state distribution of photons in thermal equilibrium. QED and electron correlation through CC are treated on the same footing. Thus an averaging over the radiation state is done to generate Lamb, Breit and hyperfine interactions from the radiative cluster. Because of the thermal distribution, it leaves a residual transverse interaction that may modify the static correlation. Dynamical correlation effects are determined next while using the exponential matter cluster in traditional ways of multireference CC. Deexcitations to negative-energy levels, included in matter clusters, generate vacuum polarization effects. The dynamical correlation energy includes relativistic corrections as well as QED contributions, namely, Lamb, Breit, hyperfine and pair energy.

本文讨论了采用标准QED哈密顿量的电动力耦合簇（CC）公式，该公式以库仑量规编写，并使用物质场的多配置SCF图片。它采用了辐射簇，物质簇及其对对，并考虑了热平衡下光子的数量状态分布。QED和通过CC的电子相关性在同一基础上处理。因此，对辐射状态进行了平均，以从辐射簇中生成Lamb，Breit和超精细相互作用。由于热分布，它会留下残余的横向相互作用，从而可能改变静态相关性。接下来，以传统的多参考CC方式使用指数物质簇确定动态相关效应。消除负能量水平，包括在物质簇中，产生真空极化效应。动态相关能量包括相对论校正以及QED贡献，即Lamb，Breit，超精细和配对能量。