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

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

2012-03-07

arxiv.org/abs/1203.1402v2

Physics

Quantum Physics

10 pages, 5 figures, sign conventions fixed, figures improved

Scientific paper

A theoretical model describing the Raman scattering process in atomic vapors is constructed. Despite the incorporated decoherence effects, it allows for a direct separation of system's time evolution from its spatial degrees of freedom. The impact of noise on the temporal properties of the system is investigated. In particular, it is shown that even in the presence of decoherence, the estimation of the number of spin waves created in the process can reach sensitivity below the projection noise limit. The model is then applied in two experimentally relevant situations of ultra-cold and room-temperature atoms. In both cases, the spatial eigenmodes of the Stokes photon and atomic excitation fields and their coupling parameters are computed.

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