具有拓扑亏损的Fano-Anderson链的传输
Transmission in a Fano-Anderson chain with a topological defect
摘要：
Fano-Anderson链由一个具有离散边单元的线性晶格组成，由于边单元的离散态与紧束缚连续体之间的耦合而表现出Fano共振散射。我们研究的情况下，一个拓扑非平凡的侧单元的Fano共振辅助运输。我们发现侧单元的拓扑结构影响传输特性，因此可以是侧单元的拓扑相位的有效检测工具。此外，我们探讨了线性紧束缚链和侧单元之间的双重链接的作用。主链和侧单元之间的次级连接可以修改传输概率中Fano共振凹陷的位置或宽度，从而产生额外的控制。
英文摘要：
The Fano-Anderson chain consists of a linear lattice with a discrete side-unit, and exhibits Fano-resonant scattering due to coupling between the discrete states of the side-unit with the tight-binding continuum. We study Fano-resonance-assisted transport for the case of a topologically non-trivial side unit. We find that the topology of the side unit influences the transmission characteristics which thus can be an effective detection tool of the topological phases of the side unit. Furthermore, we explore the role of dual links between the linear tight-binding chain and the side unit. The secondary connection between the main chain and the side unit can modify the position or width of the Fano resonance dip in the transmission probability, and thus yield additional control.
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