Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas

Abstract

Radio frequency spectra of a trapped unitary 6Li gas are reported and analyzed in terms of a theoretical approach that includes both final-state and trap effects. Final-state effects play a crucial role in evidencing two main peaks both above and below the critical temperature Tc as being associated with two distinct phases that reside in different trap regions. These are the pairing-gap and pseudo-gap phases below Tc, which evolve into the pseudo-gap and no-gap phases above Tc. In this way, a long standing puzzle about the interpretation of rf spectra for 6Li in a trap is solved.

arXiv comment5 pages, 6 figures (final version)

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Cited by in corpus (18)

• Observation of a pairing pseudogap in a two-dimensional Fermi gas
• Realization of a Resonant Fermi Gas with a Large Effective Range
• Pseudogaps in strongly interacting Fermi gases
• A two-dimensional Fermi liquid with attractive interactions
• Physics of ultracold Fermi gases revealed by spectroscopies
• Pseudogap phenomena in ultracold atomic Fermi gases
• Probing strongly interacting atomic gases with energetic atoms
• Strain induced superconductor-insulator transition on Lieb lattice
• Anomalous Behavior of Dark States in Quantum Gases of 6Li
• Pairing and radio-frequency spectroscopy in two-dimensional Fermi gases
• Single-particle spectral functions in the normal phase of a strongly-attractive Bose-Fermi mixture
• Realization of BEC-BCS crossover physics in a compact oven-loaded magneto-optic trap apparatus
• Momentum-resolved Raman spectroscopy of bound molecules in ultracold Fermi gas
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Radio frequency spectrum of fermions near a narrow Feshbach resonance
• Peaks and widths of radio-frequency spectra: An analysis of the phase diagram of ultra-cold Fermi gases
• BCS-BEC crossover in quantum confined superconductors
• Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice