Metastability in spin-polarized Fermi gases
Liao, Y.A. Revelle, M. Paprotta, T. Rittner, A.S.C. Li, W. Partridge, G.B. Hulet, R.G.
Liao, Y.A.
Revelle, M.
Paprotta, T.
Rittner, A.S.C.
Partridge, G.B.
Hulet, R.G.
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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. © 2011 American Physical Society.
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Physical Review Letters
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Date
2011-09-28
DOI
10.1103/PhysRevLett.107.145305
Type
Article