倾斜链中电荷输运对两体相互作用选择的依赖
Dependence of the charge transport in tilted chains on the choice of two-body interaction
AI总结：
本研究探讨了无自旋费米子倾斜链中两体相互作用对电荷输运的影响，通过分解密度-密度相互作用并替换为成对跃迁相互作用，发现电荷动力学可加快数个数量级。
摘要：
我们研究了存在最近邻密度-密度相互作用的无自旋费米子倾斜链，其非相互作用对应体系展现出Stark局域化。我们证明后者的两体相互作用可分解为两部分（正交），分别与单粒子哈密顿量对易和不对易。我们推导出了不对易部分的显式形式，它随倾斜减小，描述了最近邻相关跃迁和成对跃迁相互作用。当密度-密度耦合被相同大小的成对跃迁相互作用替代时，电荷动力学可能比原始模型快几个数量级。
英文摘要：
We study tilted chains of spinless fermions in the presence of the nearest-neighbor density-density interaction for which the noninteracting counterpart displays Stark localization. We demonstrate that the latter two-body interaction can be decomposed into two (orthogonal) parts which, respectively, commute and do not commute with the single-particle Hamiltonian. We derive an explicit form of the noncommuting part that decreases with tilt and describes the nearest-neighbor correlated hopping and the pair-hopping interaction. When the density-density coupling is replaced by the pair-hopping interaction of the same magnitude then the charge dynamics may be faster by a few orders of magnitude than in the original model.
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