Corpus ID: 236469407

Probing Fermi liquid exceptional points through AC conductivity

@inproceedings{Aquino2021ProbingFL,
  title={Probing Fermi liquid exceptional points through AC conductivity},
  author={Rui Aquino and D. G. Barci},
  year={2021}
}
We have recently shown that topological non-Hermitian degenerancies, the so called exceptional points, show up in the collective mode spectrum of Fermi liquids with high angular momentum interactions. In this paper, we look for signatures of these exceptional points by computing the AC conductivity of Fermi liquids with dipolar and quadrupolar interactions in a narrow slab. We show that the finite size of the slab imprints clear signatures of the collective mode spectrum in the conductivity as… Expand

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References

Non-Hermitian Topological Theory of Finite-Lifetime Quasiparticles: Prediction of Bulk Fermi Arc Due to Exceptional Point
We introduce a topological theory to study quasiparticles in interacting and/or disordered many-body systems, which have a finite lifetime due to inelastic and/or elastic scattering. The one-bodyExpand