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arXiv · 0904.4034

Multiple-quantized vortices in rotating LOFF state of ultracold Fermi superfluid gas

Miodrag L. Kulic·Armen Sedrakian·Dirk H. Rischke
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Abstract

A rotating ultracold S-wave superfluid Fermi gas is considered, when the population imbalance (or equivalently the mismatch in chemical potentials) corresponds to the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) state in the vicinity of the Lifshitz critical point. It is shown that under these conditions the critical angular velocity in two-dimensional systems is an oscillating function of temperature and population imbalance giving rise to reentrant superfluid phases. This leads to vortex lattices with multiple-quantized circulation quanta. The reason for this behavior is the population by Cooper pairs of the Landau levels above the lowest one.

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Miodrag L. Kulic, Armen Sedrakian, Dirk H. Rischke. 2009-04-26. Multiple-quantized vortices in rotating LOFF state of ultracold Fermi superfluid gas. https://doi.org/10.1103/physreva.80.043610

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