Subhomogeneous spectroscopy of a Bose condensate of neutral atoms

A method is proposed for resolving experimentally the details of the resonant fluorescence spectrum of a Bose condensate within a homogeneous line whose width is greatly increased because of collective effects. A discussion is presented concerning the application of this method for determining the shifts of the resonant frequencies of the transitions in the condensate as compared to the usual case of nondegenerate atom ensembles.

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