Comment on "Density and Spin response of a strongly-interacting Fermi gas in the attractive and quasi-repulsive regime"

Details Comment on "Density and Spin response of a strongly-interacting Fermi gas in the attractive and quasi-repulsive regime" Comment on "Density and Spin response of a strongly-interacting Fermi gas in the attractive and quasi-repulsive regime"

2012-02-25

arxiv.org/abs/1202.5590v1

Physics

Condensed Matter

Quantum Gases

1 page, no figure

Scientific paper

This is a comment on Phys. Rev. Lett. 108, 080401 (2012) by Palestini et al.
We pointed out that the diagrammatic method in that article violates gauge
invariance. As a consequence, there will a Meissner effect in the normal phase
and the contribution from collective modes are missing in the symmetry-broken
phase.

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