Theory of the Normal/Superfluid interface in population imbalanced Fermi gases

Details Theory of the Normal/Superfluid interface in population imbalanced Fermi gases Theory of the Normal/Superfluid interface in population imbalanced Fermi gases

2009-01-19

arxiv.org/abs/0901.2945v2

Phys. Rev. A 79, 063628 (2009)

Physics

Condensed Matter

Quantum Gases

15 pages, 9 figures (13 subfigures) -- v2: minor changes

Scientific paper

10.1103/PhysRevA.79.063628

We present a series of theoretical studies of the boundary between a superfluid and normal region in a partially polarized gas of strongly interacting fermions. We present mean-field estimates of the surface energy in this boundary as a function of temperature and scattering length. We discuss the structure of the domain wall, and use a previously introduced phenomonological model to study its influence on experimental observables. Our microscopic mean-field calculations are not consistent with the magnitude of the surface tension found from our phenomonological modelling of data from the Rice experiments. We conclude that one must search for novel mechanisms to explain the experiments.

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