Strongly Coupled P-Wave Superfluids May be Unstable

by Tommy on 26/04/2017

Ok, now I’m going to get into the good stuff. And the hard stuff. Pay attention!

Two-dimensional Fermi gases near a p-wave resonance, Shao-Jian Jiang and Fei Zhou (25 April 2017)

We study the stability of p-wave superfluidity for two-dimensional Fermi gases near a p-wave Feshbach resonance. A systematic analysis is carried out in the limit when the interchannel coupling is strong. We show that a homogeneous p-wave pairing is actually unstable due to quantum fluctuations, in contrast to the previously predicted p + ip superfluid in the weak-coupling limit [V. Gurarie et al., Phys. Rev. Lett. 94, 230403 (2005)]. This indicates an onset of instability at certain intermediate interchannel coupling strength. Alternatively, the instability can also be driven by lowering the particle density.

It’s not so much the results that they produce here but the techniques they use.

You can always work around or exploit instabilities.

That’s the whole point, right?

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