Second sound and the superfluid fraction in a Fermi gas with resonant interactions

Leonid A. Sidorenkov, Meng Khoon Tey (), Rudolf Grimm, Yan-Hua Hou, Lev Pitaevskii and Sandro Stringari
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Leonid A. Sidorenkov: Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
Meng Khoon Tey: Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
Rudolf Grimm: Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
Yan-Hua Hou: Universitá di Trento and INO-CNR BEC Center, I-38123 Povo, Italy
Lev Pitaevskii: Universitá di Trento and INO-CNR BEC Center, I-38123 Povo, Italy
Sandro Stringari: Universitá di Trento and INO-CNR BEC Center, I-38123 Povo, Italy

Nature, 2013, vol. 498, issue 7452, 78-81

Abstract: In an ultracold, superfluid Fermi gas, measurements of second sound — a wave in which the superfluid and normal components of the gas oscillate in antiphase — make it possible to determine the temperature dependence of the superfluid fraction.

Date: 2013
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DOI: 10.1038/nature12136

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