Pairing and Phase Separation in a Polarized Fermi Gas

Details Pairing and Phase Separation in a Polarized Fermi Gas Pairing and Phase Separation in a Polarized Fermi Gas

2005-11-30

arxiv.org/abs/cond-mat/0511752v2

Guthrie B. Partridge, Wenhui Li, Ramsey I. Kamar, Yean-an Liao, and Randall G. Hulet, Science, 23 December 2005 (10.1126/scien

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1126/science.1122876

We report the observation of a pairing in a number polarized two-component gas of atomic fermions. Beyond a critical polarization, the gas separates into a superfluid paired core surrounded by a shell of normal unpaired fermions. The critical polarization diminishes with decreasing attractive interaction. We also measure the parameter \beta = 0.54 (5) describing the universal energy of a strongly interacting Fermi gas, and find good agreement with most recent theory. These results are relevant to predictions of exotic new phases of quark matter and of strongly magnetized superconductors.

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