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most citedGauge dependence of spontaneous radiation spectrum in a time-dependent relativistic non-perturbative Coulomb field

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physics.atom-ph2023

Gauge dependence of spontaneous radiation spectrum of relativistic atomic beam under non-uniform electrostatic field

Xue-Nan Chen, Yu-Hang Luo, Xiang-Song Chen

Gauge theory requires physical observables to be gauge-independent. However, ever since Lamb noticed the problem of gauge selection in calculating atomic spontaneous radiation spec…