Quantum phases of quadrupolar Fermi gases in optical lattices
Abstract
We introduce a new platform for quantum simulation of many-body systems based on nonspherical atoms or molecules with zero dipole moment but possessing a significant value of electric quadrupole moment. We consider a quadrupolar Fermi gas trapped in a 2D square optical lattice, and show that the peculiar symmetry and broad tunability of the quadrupole-quadrupole interaction results in a rich phase diagram encompassing unconventional BCS and charge density wave phases, and opens up a perspective to create topological superfluid. Quadrupolar species, such as metastable alkaline-earth atoms and homonuclear molecules, are stable against chemical reactions and collapse and are readily available in experiment at high densities.
Keywords
Cite
@article{arxiv.1211.3317,
title = {Quantum phases of quadrupolar Fermi gases in optical lattices},
author = {Satyan G. Bhongale and Ludwig Mathey and Erhai Zhao and Susanne F. Yelin and Mikhail Lemeshko},
journal= {arXiv preprint arXiv:1211.3317},
year = {2013}
}
Comments
4 pages + supplemental material; a typo corrected