Temperature and final state effects in radio frequency spectroscopy experiments on atomic Fermi gases

Details Temperature and final state effects in radio frequency spectroscopy experiments on atomic Fermi gases Temperature and final state effects in radio frequency spectroscopy experiments on atomic Fermi gases

2008-04-09

arxiv.org/abs/0804.1429v2

Phys. Rev. Lett 102, 020402 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.102.020402

We present a systematic characterization of the radio frequency (RF) spectra of homogeneous, paired atomic Fermi gases at finite 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 detect the $\nu < 0$ continuum arising from thermally excited quasiparticles, which has not yet been seen experimentally. We explain semi-quantitatively recent RF experiments on "bound-bound" transitions and, thereby, predict the associated effects of varying temperature.

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