A momentum clustering method generalizes Hatsugai-Kohmoto models and recovers ground-state energies to within 1% of DMRG using two-site clusters in the Aubry-André-Hubbard model for strong onsite potentials.
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Decomposing momentum scales in the Hubbard Model: From Hatsugai-Kohmoto to Aubry-Andr\'e
A momentum clustering method generalizes Hatsugai-Kohmoto models and recovers ground-state energies to within 1% of DMRG using two-site clusters in the Aubry-André-Hubbard model for strong onsite potentials.