论文标题
Dicke状态的量子电动力学：谐振的一光量交换和纠缠衰减速率
Quantum Electrodynamics of Dicke States: Resonant One-Photon Exchange and Entangled Decay Rate
论文作者
论文摘要
我们通过将散射矩阵（S矩阵）元素与有效的汉密尔顿的散射矩阵（S矩阵）匹配，计算出对电原子间相互作用的单相交换贡献。这种方法使我们能够使用协方差扰动理论，其中两个可能的发射和吸收时间顺序以单个Feynman振幅进行了总结。我们的结果涵盖了对单光子交换范德 - 瓦尔斯潜力的全部阻滞校正。我们将时间表用于虚拟光子传播器。基于Feynman处方，我们获得了相互作用能的假想部分，从而导致相互作用诱导的衰减速率校正。我们的结果导致了依赖距离依赖的增强和抑制纠缠超级和次级迪克状态的衰减速率的精确公式，这是原子间距离的函数。我们将结果应用于涉及两个氢原子的示例计算，其中一个处于基态，另一个处于激发p状态。
We calculate the one-photon exchange contribution to the interatomic interaction potential between electrically neutral, identical atoms, one of which is assumed to be in an excited state, by matching the scattering matrix (S matrix) element with the effective Hamiltonian. This approach allows us to use covariant perturbation theory, where the two possible time orderings of emission and absorption are summarized in a single Feynman amplitude. Our results encompass the full retardation correction to the one-photon exchange van-der-Waals potential. We employ the temporal gauge for the virtual photon propagator. Based on the Feynman prescription, we obtain the imaginary part of the interaction energy, which leads to an interaction-induced correction to the decay rate. Our results lead to precise formulas for the distance-dependent enhancement and suppression of the decay rates of entangled superradiant and subradiant Dicke state, as a function of the interatomic distance. We apply the result to an example calculation involving two hydrogen atoms, one of which is in the ground state, the other in an excited P state.
