NRQED中的有效Angular Momentum算子及单圈匹配
Effective Angular Momentum Operators in NRQED and Matching at One-Loop Order
摘要：
在非相对论量子电动力学（NRQED）中，我们导出了有效角动量算符为$1/m^2$和单圈阶。在三维和三动量截断正则化方案中，我们分别得到了电子和光子的自旋和轨道角动量算符的非相对论展开式。我们的结果对于精确计算非相对论QED束缚态，如原子系统的角动量性质是有用的。
英文摘要：
We derive the effective angular momentum operator to $1/m^2$ and one-loop order in non-relativistic quantum electrodynamics (NRQED). In both dimensional and three-momentum-cutoff regularization schemes, we obtain the non-relativistic expansion for the spin and orbital angular momentum operators of the electron and photon, respectively. Our result is useful in precision calculations of the angular momentum properties for non-relativistic QED bound states, such as atom systems.
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