论文标题
非Bloch带崩溃和手性齐纳隧道
Non-Bloch band collapse and chiral Zener tunneling
论文作者
论文摘要
非Bloch带理论描述了具有开放边界的非热晶体中的散装能量光谱和拓扑不变的，其中散装特征态被朝向边缘挤压（皮肤效应）。然而，到目前为止，非Bloch带理论，皮肤效应和相干BLOCH动力学的相互作用尚未探索。在两种频段的非热晶格中，这里显示的是非Bloch带和皮肤模式的崩溃，深深地改变了外力下的Bloch动力学。特别是，对于迫使非Bloch带崩溃的共振导致了扎实的梯子合并和手性齐纳在两个分散bloch带之间进行隧穿。
Non-Bloch band theory describes bulk energy spectra and topological invariants in non-Hermitian crystals with open boundaries, where the bulk eigenstates are squeezed toward the edges (skin effect). However, the interplay of non-Bloch band theory, skin effect and coherent Bloch dynamics is so far unexplored. In two-band non-Hermitian lattices, it is shown here that collapse of non-Bloch bands and skin modes deeply changes the Bloch dynamics under an external force. In particular, for resonance forcing non-Bloch band collapse results in Wannier-Stark ladder coalescence and chiral Zener tunneling between the two dispersive Bloch bands.
