A Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases

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Abstract

It is quite common that several different phases exist simultaneously in a system of trapped quantum gases of ultra-cold atoms. One example is the strongly interacting Fermi gas with two imbalanced spin species, which has received a great deal of attention owing to the possible occurrence of exotic superfluid phases. By using novel numerical techniques and algorithms, we selfconsistently solve the Bogoliubov-de Gennes equations, which describe Fermi superfluids in the mean-field framework. From this study, we investigate the novel phases of spin-imbalanced Fermi gases and examine the validity of local density approximation (LDA), which is often invoked in the extraction of bulk properties from experimental measurements within trapped systems. We show how the validity of the LDA is affected by the trapping geometry, the number of atoms and the spin imbalance. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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Baksmaty, L. O., Lu, H., Bolech, C. J., & Pu, H. (2011). A Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases. New Journal of Physics, 13. https://doi.org/10.1088/1367-2630/13/5/055014

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