Eigenmode description of Raman scattering in atomic vapors in the presence of decoherence

Abstract

A theoretical model describing the Raman scattering process in atomic vapors is constructed. The treatment investigates the low-excitation regime suitable for modern experimental applications. Despite the incorporated decoherence effects (possibly mode dependent) it allows for a direct separation of the time evolution from the spatial degrees of freedom. The impact of noise on the temporal properties of the process is examined. The model is applied in two experimentally relevant situations of ultra-cold and room-temperature atoms. The spatial eigenmodes of the Stokes photons and their coupling to atomic excitations are computed. Similarly, dynamics and the waveform of the collective atomic state are derived for quantum memory implementations.

arXiv comment11 pages, 5 figures, to appear in Phys. Rev. A

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• Magnetically tuned, robust and efficient filtering system for spatially multimode quantum memory in warm atomic vapors
• Photon--Matter Quantum Correlations in Spontaneous Raman Scattering
• Multimode Raman light-atom interface in warm atomic ensemble as multiple three-mode quantum operations