title: Bragg spectroscopy of a strongly interacting Fermi gas.
abstract: 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 characterized these correlations and measured their density dependence across the broad Feshbach resonance at 834 G.
authors.affiliation: ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122, Australia.
authors.forename: G
authors.initials: G
authors.lastname: Veeravalli
authors.forename: E
authors.initials: E
authors.lastname: Kuhnle
authors.forename: P
authors.initials: P
authors.lastname: Dyke
authors.forename: C J
authors.initials: CJ
authors.lastname: Vale