论文标题
空面因果扰动理论中的量子电动力学
Quantum electrodynamics in the null-plane causal perturbation theory
论文作者
论文摘要
我们使用零平面因果扰动理论研究了光线动力学形式的量子电动力学（QED）。我们在散射过程中建立了具有即时动力学的等效性，其归一化允许构建通常的null-plane Qed lagrangian密度的瞬时项。然后，我们研究真空极化并通过研究其插入Møller的散射过程，获得完整光子的传播器，从而使其归一化，这仅在考虑仪表不变性时才等同于即时动力学之一。
We study quantum electrodynamics (QED) in the light-front dynamical form by using null-plane causal perturbation theory. We establish the equivalence with instant dynamics for the scattering processes, whose normalization allows to construct the instantaneous terms of the usual null-plane QED Lagrangian density. Then we study vacuum polarization and normalize it by studying its insertions into Møller's scattering process, obtaining the complete photon's propagator, which turns to be equivalent to the one of instant dynamics only when gauge invariance is taken into account.
