Mesoscopic BCS pairing in the repulsive one-dimensional Hubbard model
作者： Luigi Amico , Andrea Mastellone , Andreas Osterloh
DOI: 10.1103/PHYSREVB.73.214513
关键词:
摘要: We study mesoscopic pairing in the one dimensional repulsive Hubbard model and its interplay with BCS canonical ensemble. The key tool is comparing Bethe ansatz equations of two models limit small Coulomb repulsion. For ordinary interaction infinite coupling are recovered; a finite obtained by considering further density-dependent phase-correlation hopping amplitude model. find that spin degrees freedom ground state arranged type, where Cooper-pairs form an non-condensed liquid on “lattice” single particle energies provided charge freedom; condensation corresponds to excitations constituted sea singlets.
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