2008/07/04 by Qijin Chen, K. Levin · 83 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dispersion (optics) #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Momentum (technical analysis) #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Radio frequency #Spectroscopy #Superconductivity #Telecommunications #Unitarity #cond-mat.quant-gas #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.102.190402
published in Physical Review Letters 102(19), 190402 (American Physical Society) · 5 pages, 4 figures
arxiv created 2008/07/04 · openalex publication_date 2009/05/15 · arxiv updated 2011/09/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We address recent momentum-resolved radio frequency (rf) spectroscopy experiments, showing how they yield more stringent tests than other comparisons with theory, associated with the ultracold Fermi gases. We demonstrate that, by providing a clear dispersion signature of pairing, they remove the ambiguity plaguing the interpretation of previous rf experiments. Our calculated spectral intensities are in semiquantitative agreement with the data. Even in the presence of a trap, the spectra are predicted to exhibit two BCS-like branches.