论文标题
通过连贯耦合的非铁皮皮肤效应的方向逆转
Direction reversal of non-Hermitian skin effect via coherent coupling
论文作者
论文摘要
非平衡系统中的绝对负迁移率（ANM）描述了颗粒向外力相反方向传播的可能性。我们在这项工作中揭示了类似于ANM在非铁皮效应（NHSE）影响下，与ANM相似的非ANM的特征性定位和粒子转运。表明，两个非炎症链之间具有相同的NHSE优选方向的两个非热链之间的相干耦合显示，这会导致所有特征模型的NHSE方向逆转。使用非热量子步行平台在当前实验的范围内进一步研究了这一概念。我们的发现既是定性和定量的解释。 NHSE的可能方向逆转可能会导致有趣的应用。
Absolute negative mobility (ANM) in nonequilibrium systems depicts the possibility of particles propagating toward the opposite direction of an external force. We uncover in this work a phenomenon analogous to ANM regarding eigenstate localization and particle transport in non-Hermitian systems under the influence of the non-Hermitian skin effect (NHSE). A coherent coupling between two non-Hermitian chains individually possessing the same preferred direction of NHSE is shown to cause a direction reversal of NHSE for all eigenmodes. This concept is further investigated in terms of time evolution dynamics using a non-Hermitian quantum walk platform within reach of current experiments. Our findings are explained both qualitatively and quantitatively. The possible direction reversal of NHSE can potentially lead to interesting applications.
