Phase dependent spectrum of scattered light from two Bose condensates

Details Phase dependent spectrum of scattered light from two Bose condensates Phase dependent spectrum of scattered light from two Bose condensates

1996-11-11

arxiv.org/abs/cond-mat/9611074v2

Phys. Rev. A 55 (1997) 3625

Physics

Condensed Matter

14 pages, 1 postscript figure

Scientific paper

10.1103/PhysRevA.55.3625

We calculate the spectrum of the scattered light from quantum degenerate atomic gases obeying Bose-Einstein statistics. The atoms are assumed to occupy two ground states which are optically coupled through a common excited state by two low intensity off-resonant light beams. In the presence of a Bose condensate in both ground states, the atoms may exhibit light induced oscillations between the two condensates analogous to the Josephson effect. The spectrum of the scattered light is calculated in the limit of a low oscillation frequency. In the spectrum we are able to observe qualitative features depending on the phase difference between the macroscopic wave functions of the two condensates. Thus, our optical scheme could possibly be used as an experimental realization of the spontaneous breakdown of the U(1) gauge symmetry in the Bose-Einstein condensation.

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