PCA applied to correlation matrices from ED data on 3x4 and 4x4 clusters identifies charge-dominated, spin-dominated, and pairing-dominated regimes in quarter-filled Hubbard models through variance condensation into leading components.
For both lattices, E0/M rises monotonically as V increases, reflecting the positive energy cost of placing electrons on neighboring sites
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Principal Component Analysis of Competing Correlations in Quarter-Filled Hubbard Models
PCA applied to correlation matrices from ED data on 3x4 and 4x4 clusters identifies charge-dominated, spin-dominated, and pairing-dominated regimes in quarter-filled Hubbard models through variance condensation into leading components.