The paper fully solves competing instabilities in a Fermi gas with single-wavelength cavity-induced interactions, showing density-wave dominance for attractive cases, non-superradiant superfluids for repulsive cases, and always-deformed Fermi surfaces.
Like in the pairing scenarios we can relate the eigenvalues to the momenta
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The fate of the Fermi surface coupled to a single-wave-vector cavity mode
The paper fully solves competing instabilities in a Fermi gas with single-wavelength cavity-induced interactions, showing density-wave dominance for attractive cases, non-superradiant superfluids for repulsive cases, and always-deformed Fermi surfaces.