Probing anisotropic superfluidity of rashbons in atomic Fermi gases

Details Probing anisotropic superfluidity of rashbons in atomic Fermi gases Probing anisotropic superfluidity of rashbons in atomic Fermi gases

2011-05-12

arxiv.org/abs/1105.2488v1

Phys. Rev. Lett. 107, 195304 (2011)

Physics

Condensed Matter

Quantum Gases

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.107.195304

Motivated by the prospect of realizing a Fermi gas of $^{40}$K atoms with a synthetic non-Abelian gauge field, we investigate theoretically a strongly interacting Fermi gas in the presence of a Rashba spin-orbit coupling. As the two-fold spin degeneracy is lifted by spin-orbit interaction, bound pairs with mixed singlet and triplet pairings (referred to as rashbons) emerge, leading to an anisotropic superfluid. We show that this anisotropic superfluidity can be probed via measuring the momentum distribution and single-particle spectral function in a trapped atomic $^{40}$K cloud near a Feshbach resonance.

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