New type of crossover physics in three-component Fermi gases - INSPIRE

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New type of crossover physics in three-component Fermi gases

Yusuke Nishida
(
- Los Alamos
)

Jul, 2012

6 pages

Published in:

Phys.Rev.Lett. 109 (2012) 240401

e-Print:

1207.6971 [cond-mat.quant-gas]

DOI:

10.1103/PhysRevLett.109.240401

Report number:

LA-UR-12-23551

View in:

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Abstract: (arXiv)

A three-component Fermi gas near a broad Feshbach resonance does not have a universal ground state due to the Thomas collapse, while it does near a narrow Feshbach resonance. We explore its universal phase diagram in the plane of the inverse scattering length 1/akF and the resonance range RkF. For a large RkF, there exists a Lifshitz transition between superfluids with and without an unpaired Fermi surface as a function of 1/akF. With decreasing RkF, the Fermi surface coexisting with the superfluid can change smoothly from that of atoms to trimers ('atom-trimer continuity'), corresponding to the quark-hadron continuity in a dense nuclear matter. Eventually, there appears a finite window in 1/akF where the superfluid is completely depleted by the trimer Fermi gas, which gives rise to a pair of quantum critical points. The boundaries of these three quantum phases are determined in regions where controlled analyses are possible and are also evaluated based on a mean-field plus trimer model.

Note:

6 pages, 4 figures/ published with the new title

67.85.Lm
05.30.Rt
03.75.Ss

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Figures(4)

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