Pairing Without Superfluidity: The Ground State of an Imbalanced Fermi Mixture

+ See all authors and affiliations

Science  11 May 2007:
Vol. 316, Issue 5826, pp. 867-870
DOI: 10.1126/science.1140749

You are currently viewing the abstract.

View Full Text

This article has a correction. Please see:


We used radio-frequency spectroscopy to study pairing in the normal and superfluid phases of a strongly interacting Fermi gas with imbalanced spin populations. At high spin imbalances, the system does not become superfluid even at zero temperature. In this normal phase, full pairing of the minority atoms was observed. Hence, mismatched Fermi surfaces do not prevent pairing but can quench the superfluid state, thus realizing a system of fermion pairs that do not condense even at the lowest temperature.

    View Full Text