Phys. Rev. Lett. 101, 250403 (2008) [4 pages]Bragg Spectroscopy of a Strongly Interacting Fermi GasSee Also: Publisher's Note Received 12 September 2008; revised 20 October 2008; published 19 December 2008; corrected 20 May 2009 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.250403
DOI:
10.1103/PhysRevLett.101.250403
PACS:
05.30.Fk, 03.75.Hh, 03.75.Ss, 67.85.−d
See AlsoPublisher's Note: G. Veeravalli, E. Kuhnle, P. Dyke, and C. J. Vale, Publisher’s Note: Bragg Spectroscopy of a Strongly Interacting Fermi Gas [Phys. Rev. Lett. 101, 250403 (2008)], Phys. Rev. Lett. 102, 219901 (2009). |
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