论文标题
相互作用引起的拓扑泵
Interaction Induced Topological Charge Pump
论文作者
论文摘要
基于对称性保护拓扑阶段（SPT）的拓扑过渡，提出了与对称性破坏参数作为合成维度的相互作用诱导的拓扑电荷泵（ITCP）。这意味着SPT的相边界是拓扑阻塞，尽管ITCP和差距闭合奇异性对于对称性破坏扰动是稳定的。我们已经使用DMRG确认了与米勒相互作用最近的米勒模型的ITCP的散装对应关系。至于在光学晶格中实现的实现，也提出了一项相互作用的泵协议。
Based on a topological transition of the symmetry protected topological phase (SPT), an interaction induced topological charge pump (iTCP) is proposed with the symmetry breaking parameter as a synthetic dimension. It implies that the phase boundary of the SPT is the topological obstruction although iTCP and the gap closing singularity is stable for symmetry breaking perturbations. We have confirmed the bulk-edge correspondence for this iTCP using DMRG for the Rice-Mele model with nearest-neighbor interactions. As for a realization in optical lattices, an interaction sweeping pump protocol is proposed as well.
