2005/11/30 by Guthrie B. Partridge, Wenhui Li, Ramsey I. Kamar +2 · 2 citations
Physics and Astronomy · #cond-mat.other #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1126/science.1122876
published as Guthrie B. Partridge, Wenhui Li, Ramsey I. Kamar, Yean-an Liao, and Randall G. Hulet, Science, 23 December 2005 (10.1126/science.1122876)
arxiv created 2006/01/14 · arxiv updated 2009/12/01
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 β= 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.