Superconductivity in the three-leg Hubbard ladder: a Quantum Monte Carlo study
Takashi Kimura, Kazuhiko Kuroki, Hideo Aoki
Abstract
Quantum Monte Carlo method is used to look into the superconductivity in the three-leg Hubbard ladder. The enhanced correlation for the pairing across the central and edge chains, which has been predicted in the weak-coupling renormalization as an effect of coexistence of gapful and gapless spin modes, is here shown to persist for intermediate interaction strengths.
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