Bethe-Ansatz Analysis of the Extended AB Period in the One-Dimensional Hubbard Model

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概要

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• The extended spectral flow at the nornaal-superconducting transition is investigated for theone-dinaensional Hubbard model. Recombination of' spectral flow lines at U = .:+o, which causeshalving of the extended Aharonov-Bohrn period for U< 0 fotrnd in a recent paper [K. Kusakabeand H. Aoki: J. Phys. Soc. Jpn. 65 (1996) 2772], is ex?xctly analyzed using the Bethe ansatzsolution. Adiabatic motion of charge rapidities xvhich are real for U >O (normal Luttingerliqtrid) or cornplex for U< 0 (superconducting Luther-Emery liquid) dominates sudden responseof the spectral flow at the transition point, The extended period is obtained not only againstthe charge flux but also against the spin flux for both U >O and U< 0.

• 社団法人日本物理学会の論文
• 1997-07-15

著者

• Kusakabe Koichi

  Institute For Solid State Physics University Of Tokyo

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