Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
Journal Article
·
· Physical Review Letters
- Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
We present majority and minority radio frequency spectra of strongly interacting imbalanced Fermi gases of {sup 6}Li. We observed a smooth evolution in the nature of pairing correlations from pairing in the superfluid region to polaron binding in the highly polarized normal region. The imbalance induces quasiparticles in the superfluid region even at very low temperature. This leads to a local bimodal spectral response, which allowed us to determine the superfluid gap {delta} and the Hartree energy U.
- OSTI ID:
- 21179763
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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