Pairing gap and in-gap excitations in trapped fermionic superfluids

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Research units

  • 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.


Original languageEnglish
Pages (from-to)1131-1133
Number of pages3
Issue number5687
Publication statusPublished - 20 Aug 2004
MoE publication typeA1 Journal article-refereed

ID: 5340172