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arXiv · 0804.3364

A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase

Aurel Bulgac·Michael McNeil Forbes
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Abstract

We present strong theoretical evidence that a Larkin-Ovchinnikov (LOFF/FFLO) pairing phase is favoured over the homogeneous superfluid and normal phases in three-dimensional unitary Fermi systems. Using a Density Functional Theory (DFT) based on the latest quantum Monte-Carlo calculations and experimental results, we show that this phase is competitive over a large region of the phase diagram. The oscillations in the number densities and pairing field have a substantial amplitude, and a period some 3 to 10 times the average interparticle separation. Within the DFT, the transition to a normal polarized Fermi liquid at large polarizations is smooth, while the transition to a fully-paired superfluid is abrupt.

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Aurel Bulgac, Michael McNeil Forbes. 2008-12-08. A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase. https://doi.org/10.1103/physrevlett.101.215301

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