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arXiv · 1211.3317

Quantum phases of quadrupolar Fermi gases in optical lattices

Satyan G. Bhongale·Ludwig Mathey·Erhai Zhao·Susanne F. Yelin·Mikhail Lemeshko
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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.

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Satyan G. Bhongale, Ludwig Mathey, Erhai Zhao, Susanne F. Yelin, Mikhail Lemeshko. 2013-11-20. Quantum phases of quadrupolar Fermi gases in optical lattices. https://doi.org/10.1103/physrevlett.110.155301

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