Extracting density–density correlations fromin situimages of atomic quantum gases

2011/04/29 by Chen-Lung Hung, Xibo Zhang, Li-Chung Ha +3 · 2 citations
Physics and Astronomy · #Atomic number #Atomic system #Cold Atom Physics and Bose-Einstein Condensates #Filling factor #Quantum #Quantum many-body systems #Random lasers and scattering media #Structure factor #Thermal #cond-mat.quant-gas #cond-mat.stat-mech

paper · pdf · doi:10.1088/1367-2630/13/7/075019

published as New J. Phys. 13 075019 (2011) Focus issue on Quantum Simulation · 15 pages, 5 figures

arxiv created 2011/04/29 · openalex publication_date 2011/07/29 · arxiv updated 2011/09/05 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05

Abstract

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 the 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.

Citations

• Slow Mass Transport and Statistical Evolution of an Atomic Gas across the Superfluid–Mott-Insulator Transition
• Comparison of the Hanbury Brown–Twiss effect for bosons and fermions
• Anomalous Fluctuations in Phases with a Broken Continuous Symmetry
• Probing many-body states of ultracold atoms via noise correlations
• Two-point density correlations of quasicondensates in free expansion
• Probing the Superfluid to Mott Insulator Transition at the Single Atom Level
• Universal relaxational dynamics near two-dimensional quantum critical points
• Spatial quantum noise interferometry in expanding ultracold atom clouds

Cited by

• Magnetic phase transition in coherently coupled Bose gases in optical lattices
• Revealing Single-Trap Condensate Fragmentation by Measuring Density-Density Correlations after Time of Flight
• A Rapidly Expanding Bose-Einstein Condensate: An Expanding Universe in the Lab