Extracting density-density correlations from in situ images of atomic quantum gases

Details Extracting density-density correlations from in situ images of atomic quantum gases Extracting density-density correlations from in situ images of atomic quantum gases

2011-04-29

arxiv.org/abs/1105.0030v1

New J. Phys. 13 075019 (2011) Focus issue on Quantum Simulation

Physics

Condensed Matter

Quantum Gases

15 pages, 5 figures

Scientific paper

10.1088/1367-2630/13/7/075019

We present a complete recipe to extract the density-density correlations and the static structure factor of a two-dimensional (2D) atomic quantum gas from in situ imaging. Using images of non-interacting thermal gases, we characterize and remove the systematic contributions of imaging aberrations to the measured density-density correlations of atomic samples. We determine the static structure factor and report results on weakly interacting 2D Bose gases, as well as strongly interacting gases in a 2D optical lattice. In the strongly interacting regime, we observe a strong suppression of the static structure factor at long wavelengths.

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