Metastability in Spin-Polarized Fermi Gases
Atomic Physics
2011-09-29 v2 Quantum Gases
Strongly Correlated Electrons
Superconductivity
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.
Cite
@article{arxiv.1105.6369,
title = {Metastability in Spin-Polarized Fermi Gases},
author = {Y. A. Liao and M. Revelle and T. Paprotta and A. S. C. Rittner and Wenhui Li and G. B. Partridge and R. G. Hulet},
journal= {arXiv preprint arXiv:1105.6369},
year = {2011}
}
Comments
4 pages, 6 figures