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.

Schunck, C., Shin, Y., Schirotzek, A., Zwierlein MW, & Ketterle, W. (2007). Physics: Pairing without superfluidity: The ground state of an imbalanced fermi mixture. SCIENCE, 316(5826), 867-870 [10.1126/science.1140749].

Physics: Pairing without superfluidity: The ground state of an imbalanced fermi mixture

SCHUNCK, CHRISTIAN;
2007

Abstract

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.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - Fisica Sperimentale
English
Schunck, C., Shin, Y., Schirotzek, A., Zwierlein MW, & Ketterle, W. (2007). Physics: Pairing without superfluidity: The ground state of an imbalanced fermi mixture. SCIENCE, 316(5826), 867-870 [10.1126/science.1140749].
Schunck, C; Shin, Y; Schirotzek, A; Zwierlein, M; Ketterle, W
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/189677
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