Radio-frequency spectroscopy and the pairing gap in trapped Fermi gases

Journal Article · Fri Jul 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.011602· OSTI ID:20718288

Yan, He; Qijin, Chen; Levin, K ^[1]

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1. James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)

We present a theoretical interpretation of radio frequency (RF) pairing gap experiments in trapped atomic Fermi gases, over the entire range of the BCS-Bose-Einstein condensation (BEC) crossover, for temperatures above and below T{sub c}. Our calculated RF excitation spectra, as well as the density profiles on which they are based, are in semiquantitative agreement with experiment. We provide a detailed analysis of the physical origin of the two different peak features seen in RF spectra, one associated with nearly free atoms at the edge of the trap, and the other with (quasi-)bound fermion pairs.

• OSTI ID: 20718288
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
EXCITATION
FERMI GAS
FERMIONS
RADIOWAVE RADIATION
SPECTROSCOPY
TRAPPING
TRAPS