Metastability in spin-polarized Fermi gases |
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Authors: | Liao Y A Revelle M Paprotta T Rittner A S C Li Wenhui Partridge G B Hulet R G |
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Institution: | Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston, Texas 77005, USA. |
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Abstract: | 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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