Temperature and Final State Effects in Radio Frequency Spectroscopy Experiments on Atomic Fermi Gases

Journal Article · Fri Jan 16 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.020402· OSTI ID:21180108

Yan, He; Chien, C -C; 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 simple and systematic characterization of the radio frequency (rf) spectra of homogeneous, paired atomic Fermi gases at general temperatures T in the presence of final-state interactions. The spectra, consisting of possible bound states and positive as well as negative detuning ({nu}) continua, satisfy exactly the zeroth- and first-moment sum rules at all T. We show how to best extract the pairing gap and how to detect the {nu}<0 continuum arising from thermally excited quasiparticles, not yet seen experimentally. We explain semiquantitatively recent rf experiments on 'bound-bound' transitions, predicting effects of varying temperature.

• OSTI ID: 21180108
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOUND STATE
FERMI GAS
FINAL-STATE INTERACTIONS
QUASI PARTICLES
RADIOWAVE RADIATION
SPECTRA
SPECTROSCOPY
SUM RULES