Cooperative scattering measurement of coherence in a spatially modulated Bose gas

Details Cooperative scattering measurement of coherence in a spatially modulated Bose gas Cooperative scattering measurement of coherence in a spatially modulated Bose gas

2011-05-07

arxiv.org/abs/1105.1425v1

Physics

Condensed Matter

Quantum Gases

4pages, 3figures, to appear in Phys. Rev. A

Scientific paper

Correlations of a Bose gas released from an optical lattice are measured using superradiant scattering. Conditions are chosen so that after initial incident light pumping at the Bragg angle for diffraction, due to matter wave amplification and mode competition, superradiant scattering into the Bragg diffracted mode is preponderant. A temporal analysis of the superradiant scattering gain reveals periodical oscillations and damping due to the initial lack of coherence between lattice sites. Such damping is used for characterizing first order spatial correlations in our system with a precision of one lattice period.

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