Non-Markovian theory of relativistic electric-dipole spontaneous emission of hydrogen-like atoms

摘要

The non-Markovian corrections to electric-dipole emission of hydrogen-like atoms of large atomic number Z are studied by multipole photon field formulation. The correlation functions are derived by the corresponding spectra, which show how the delta-function type correlation is approached. The decay of upper-level population is calculated by the relevant integro-differential equation. The numerical results show that the relativistic and finite atom-size corrections are evident; while the non-Markovian corrections are negligible in the main period of decay, they can manifest themselves in the far remote tail.