论文标题
相关辅助量化电荷抽水
Correlation-Assisted Quantized Charge Pumping
论文作者
论文摘要
我们研究了在有序的拓扑阶段附近泵送的电荷泵，即在存在强相关性的情况下，对对称性受保护的拓扑阶段掩盖了自发对称性。为了探讨这一点，我们研究了具有有限范围相互作用的典型的Su-Schrieffer-Heeger模型，从而产生了轨道电荷密度的波浪顺序，并表征了该顺序对模型拓扑特性的影响。在有序的阶段，在多体拓扑不变的丢失量化的情况下，我们发现不仅可以量化电荷泵送，而且甚至可以得到轨道电荷密度波阶的集体性质的帮助。值得注意的是，我们表明，您可以使用无泵的场景来揭示订单式嵌入阶段的基本拓扑。
We investigate charge pumping in the vicinity of order-obstructed topological phases, i.e. symmetry protected topological phases masked by spontaneous symmetry breaking in the presence of strong correlations. To explore this, we study a prototypical Su-Schrieffer-Heeger model with finite-range interaction that gives rise to orbital charge density wave order, and characterize the impact of this order on the model's topological properties. In the ordered phase, where the many-body topological invariant loses quantization, we find that not only is quantized charge pumping still possible, but it is even assisted by the collective nature of the orbital charge density wave order. Remarkably, we show that the Thouless pump scenario may be used to uncover the underlying topology of order-obstructed phases.
