Pairing gap and in-gap excitations in trapped fermionic superfluids
Research output: Contribution to journal › Article
- University of Jyväskylä
We consider trapped atomic Fermi gases with Feshbach-resonance enhanced interactions in pseudogap and superfluid temperatures. We calculate the spectrum of radio-frequency (or laser) excitations for transitions that transfer atoms out of the superfluid state. The spectrum displays the pairing gap and also the contribution of unpaired atoms, that is, in-gap excitations. The results support the conclusion that a superfluid, in which pairing is a many-body effect, was observed in recent experiments on radio-frequency spectroscopy of the pairing gap.
|Number of pages||3|
|Publication status||Published - 20 Aug 2004|
|MoE publication type||A1 Journal article-refereed|