Phase Separation in Mixtures of Repulsive Fermi Gases Driven by Mass Difference
Quantum Gases
2013-04-26 v2
Abstract
We show that phase separation must occur in a mixture of fermions with repulsive interaction if their mass difference is sufficiently large. This phenomenon is highly dimension-dependent. Consequently, the density profiles of phase separated 3d mixtures are very different from those in 1d. Noting that the ferromagnetic transition of a spin-1/2 repulsive Fermi gas is the equal mass limit of the phase separation in mixtures, we show from the Bethe Ansatz solution that a ferromagnetic transition will take place in the scattering states when the repulsive interaction passes through resonance and becomes attractive.
Keywords
Cite
@article{arxiv.1208.2211,
title = {Phase Separation in Mixtures of Repulsive Fermi Gases Driven by Mass Difference},
author = {Xiaoling Cui and Tin-Lun Ho},
journal= {arXiv preprint arXiv:1208.2211},
year = {2013}
}
Comments
4.5 pages, 2 figures, version accepted by Phys. Rev. Lett