Metastability in Spin-Polarized Fermi Gases

Details Metastability in Spin-Polarized Fermi Gases Metastability in Spin-Polarized Fermi Gases

2011-05-31

arxiv.org/abs/1105.6369v2

Physics Review Letters 107, 145305 (2011)

Physics

Atomic Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.107.145305

We study the role of particle transport and evaporation on the phase separation of an ultracold, spin-polarized atomic Fermi gas. We show that the previously observed deformation of the superfluid paired core is a result of evaporative depolarization of the superfluid due to a combination of enhanced evaporation at the center of the trap and the inhibition of spin transport at the normal-superfluid phase boundary. These factors contribute to a nonequilibrium jump in the chemical potentials at the phase boundary. Once formed, the deformed state is highly metastable, persisting for times of up to 2 s.

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