A loop expansion in the topological heavy fermion model yields quasiparticle lifetimes and a Curie-Weiss flavor susceptibility above the ordering temperature despite strong interactions.
Hubbard, Electron correlations in narrow energy bands, Proceedings of the Royal Society of London
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Dual Fermion outperforms DMFT on thermodynamics, electronic structure and susceptibilities for the Falicov-Kimball model but is less accurate for orbital density versus chemical potential in the doped regime.
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Controlled Loop Expansion for the Topological Heavy Fermion Model
A loop expansion in the topological heavy fermion model yields quasiparticle lifetimes and a Curie-Weiss flavor susceptibility above the ordering temperature despite strong interactions.
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Benchmarking the Dual Fermion approach on the Falicov-Kimball model
Dual Fermion outperforms DMFT on thermodynamics, electronic structure and susceptibilities for the Falicov-Kimball model but is less accurate for orbital density versus chemical potential in the doped regime.