2011/06/28 by Wenzhuo Zhang, Wen-Zhuo Zhang, Zhang, Wen-Zhuo +3
Computer Science · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Optics (physics.optics) #Quantum Information and Cryptography #Quantum optics and atomic interactions #physics.atom-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1106.5783
8 pages, 4 figures
openalex publication_date 2011/06/28 · arxiv created 2011/11/22 · arxiv updated 2011/11/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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-shell bound electrons provide the off-shell amplitudes of photons' propagation in atoms phenomenally. Our work set up the connection between the property of Feynman propagators in bound-state QED and the superluminal but casual propagating behavior of light in atomic media. We also studied the relation between the bound-state QED and the widely used light-atom interacting model in quantum optics, and give the experimental condition where only the bound-state QED is valid.