Theory of rf-spectroscopy of strongly interacting fermions

M. Punk, W. Zwerger

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


We show that strong pairing correlations in Fermi gases lead to the appearance of a gaplike structure in the rf spectrum, both in the balanced superfluid and in the normal phase above the Clogston-Chandrasekhar limit. The average rf shift of a unitary gas is proportional to the ratio of the Fermi velocity and the scattering length with the final state. In the strongly imbalanced case, the rf spectrum measures the binding energy of a minority atom to the Fermi sea of majority atoms. Our results provide a qualitative understanding of recent experiments by Schunck et al.

Original languageEnglish
Article number170404
JournalPhysical Review Letters
Issue number17
StatePublished - 25 Oct 2007


Dive into the research topics of 'Theory of rf-spectroscopy of strongly interacting fermions'. Together they form a unique fingerprint.

Cite this