Exact Bethe-ansatz calculation of the 1D Hubbard Fermi polaron spectral function reveals anomalous Fermi singularities at the Brillouin-zone boundary and collective polaron quasiparticle peaks near quarter filling.
Wang, Functional determinant approach investigations of heavy impurity physics, AAPPS Bull
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Exact spectral properties of Fermi polarons in one-dimensional lattices: Anomalous Fermi singularities and polaron quasiparticles
Exact Bethe-ansatz calculation of the 1D Hubbard Fermi polaron spectral function reveals anomalous Fermi singularities at the Brillouin-zone boundary and collective polaron quasiparticle peaks near quarter filling.