2008/09/30 by G. Veeravalli, E. Kuhnle, P. Dyke +1 · 1 citation
Physics and Astronomy · #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.101.250403
published as Phys. Rev. Lett. 101, 250403 (2008) · Replaced with published version
arxiv created 2008/12/22 · arxiv updated 2009/12/01
We present a comprehensive study of the Bose-Einstein condensate to Bardeen-Cooper-Schrieffer (BEC-BCS) crossover in fermionic 6Li using Bragg spectroscopy. A smooth transition from molecular to atomic spectra is observed with a clear signature of pairing at and above unitarity. These spectra probe the dynamic and static structure factors of the gas and provide a direct link to two-body correlations. We have characterised these correlations and measured their density dependence across the broad Feshbach resonance at 834 G.