Pairing and Phase Separation in a Polarized Fermi Gas
By G. Partridge, Wenhui Li, R. I. Kamar, Y. Liao, R. Hulet. Science, 2005
590 citations recorded by the source corpus.
We report the observation of pairing in a gas of atomic fermions with unequal numbers of two components. Beyond a critical polarization, the gas separates into a phase that is consistent with a superfluid paired core surrounded by a shell of normal unpaired fermions. The critical polarization diminishes with decreasing attractive interaction. For near-zero polarization, we measured the parameter β = –0.54 ± 0.05, describing the universal energy of a strongly interacting paired Fermi gas, and found good agreement with recent theory. These results are relevant to predictions of exotic new phases of quark matter and of strongly magnetized superconductors.
View Paper: https://www.semanticscholar.org/paper/60c12aa4883330c80be5c1ee91967d07a675016e
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
Citations in the corpus
- Making, probing and understanding ultracold Fermi gases (2008, methodology): “concluded that the critical imbalance on resonance was close to 100%. The discrepancy to the MIT results is probably related to the lower atom number and higher aspect ratio used in these experiments [79, 81]. The phase diagram in Fig. 74 highlights how far experimental studies on degenerate Fermi g”
- Feshbach resonances in ultracold gases (2008, methodology): “(Zwierlein et al., 2006) and (Partridge et al., 2006) performed experiments with unbalanced mixtures of two spin states, i.e. polarized Fermi gases.”
- Rapidly rotating atomic gases (2008, background): “ However, a magnetic field also induces orbital effects, precluding a study of the effects of the density imbalance alone. In atomic gases the density imbalance can be achieved without any orbital effects[215, 216]. New physics can also emerge in atomic gases in the complementary situation: that is, to ”
- Fermi gases in one dimension: From Bethe ansatz to experiments (2013, background): “In a 3D trapped Fermi gas, the fully paired core is surrounded by a shell of excess fermions (Partridge et al., 2006; Zwierlein et al., 2006).”
- Superfluidity in nuclear systems and neutron stars (2018, background): “These systems offer unique possibilities for testing the physics of imbalanced superfluidity under controllable conditions in laboratory experiments [103, 255].”
- Orbital superfluidity in the $P$-band of a bipartite optical square lattice (2010, result): “This is in contrast to the observed spatial separation of paired and unpaired fermions in optically trapped unbalanced fermionic spin mixture”