Theory of collective Raman scattering from a Bose-Einstein condensate
arXiv:cond-mat/0405514 · doi:10.1103/PhysRevA.70.045601
Abstract
Recent experiments have demonstrated superradiant Raman scattering from a Bose-Einstein condensate driven by a single off-resonant laser beam. We present a quantum theory describing this phenomenon, showing Raman amplification of matter wave due to collective atomic recoil from 3-level atoms in a -configuration. When atoms are initially in a single lower internal state, a closed two-level system is realized between atoms with different internal states, and entangled atom-photon pairs can be generated. When atoms are initially prepared in both the lower internal states, a fraction of atoms recoiling in the backward direction can be generated.
arXiv comment5 pages, 2 figures
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