Induced interaction in a spin-polarized Fermi gas

Details Induced interaction in a spin-polarized Fermi gas Induced interaction in a spin-polarized Fermi gas

2010-07-09

arxiv.org/abs/1007.1506v1

Phys. Rev. A 82, 013605 (2010)

Physics

Condensed Matter

Quantum Gases

6 pages, 2 figures

Scientific paper

10.1103/Phys.Rev.A82.013605

We study the effect of the induced interaction on the superfluidtransition temperature of a spin-polarized Fermi gas. In the BCS limit, the polarization is very small in the superfluid state, and the effect of the induced interaction is almost the same as in the spin-balanced case. The temperature Tt and the polarization Pt of the tricritical point are both reduced from mean-field results by a factor about 2.22. This reduction is also significant beyond the BCS limit. In the unitary limit, we find (Pt,Tt/TF)=(0.42,0.16), in comparison with mean-field and experimental results.

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