Tomographic RF Spectroscopy of a Trapped Fermi Gas at Unitarity

Abstract

We present spatially resolved radio-frequency spectroscopy of a trapped Fermi gas with resonant interactions and observe a spectral gap at low temperatures. The spatial distribution of the spectral response of the trapped gas is obtained using in situ phase-contrast imaging and 3D image reconstruction. At the lowest temperature, the homogeneous rf spectrum shows an asymmetric excitation line shape with a peak at 0.48(4)${\epsilon }_F$ with respect to the free atomic line, where ${\epsilon }_F$ is the local Fermi energy.

References in corpus (7)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• Precision Measurements of Collective Oscillations in the BEC-BCS Crossover
• Pairing without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
• The potential energy of a ${}^{40}$K Fermi gas in the BCS-BEC crossover

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