标题： 一维物理在过渡金属纳米线中：重整化群和玻色化分析 显示英文标题

标题： One-dimensional physics in transition-metal nanowires: Renormalization group and bosonization analysis

摘要： 我们研究了一维双轨道Hubbard模型，该模型包含一般的局部相互作用，包括一个成对跃迁项。该模型可能在一维过渡金属纳米线中实现。通过重整化群方程和玻色化方法的数值积分获得了T=0时的相图。特别关注轨道简并（或近简并）、有利于局部高自旋构型的相互作用以及速度差异的影响。采用了动力学对称性扩展和对偶方法来确定基态并理解它们之间的量子相变。一个重要结果是，成对跃迁项和相关的轨道对称性可能导致新的绝缘态。还讨论了自旋极化情况下的基态。 显示英文摘要

摘要： We study the one-dimensional two-orbital Hubbard model with general local interactions including a pair-hopping term. The model might be realized in one-dimensional transition-metal nanowires. Phase diagrams at T=0 are obtained by numerical integration of renormalization group equations and bosonization. Particular attention is paid to the effects of orbital degeneracy (or near-degeneracy), interactions favoring locally high-spin configurations, and velocity differences. Dynamical symmetry enlargement and duality approaches are employed to determine ground states and to understand quantum phase transitions between them. An important result is that the pair-hopping term and associated orbital symmetry can lead to new insulating states. The ground state for spin-polarized case is also discussed.