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physics.atom-ph2012★ 1 cited
QED-based Optical Bloch Equations without electric dipole approximation: A model for a two-level atom interacting with a monochromatic X-ray laser beam
Wen-Zhuo Zhang, Wu-Ming Liu
We derive a set of optical Bloch equations (OBEs) directly from the minimal-coupling Hamiltonian density of the bound-state quantum electrodynamics (bound-state QED). Such optical…
physics.atom-ph2011
Bound-state QED solutions of the photons off-shell propagating behavior in atoms
Wen-Zhuo Zhang, Wu-Ming Liu
We use the S-matrix formalism of bound-state QED to study the photon-atom scattering. We find that the internal lines in Feynman diagrams which describing the propagation of off-sh…