Non-Hermitian edge burst without skin localization
Non-Hermitian edge burst without skin localization
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DOI：
10.1103/physrevb.107.l140302
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发表时间：
2022-12
影响因子：
3.7
通讯作者：
C. Yuce;H. Ramezani
中科院分区：
文献类型：
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作者：
C. Yuce;H. Ramezani
在一类具有开放边界条件的有损晶格中的非厄米量子游动中，衰变几率分布的一个意想不到的峰值出现在边缘处，称为边缘爆发。边缘爆发被认为是由非厄米特集肤效应和频谱的假想无高度共同产生的[文-谭雪等人，物理。莱特牧师。128,120401(2022年)]。利用一种具有非均匀损失率的一维有损晶格，我们证明了即使在没有皮肤局部化的情况下，也可以发生边缘猝发。此外，我们还讨论了当频谱满足假想的步态条件时，可能不会出现边缘猝发。除了它的基本重要性外，通过消除对观察边缘猝发效应的限制，我们的结果为边缘猝发效应的未来应用打开了更广阔的设计空间。
In a class of non-Hermitian quantum walk in lossy lattices with open boundary conditions, an unexpected peak in the distribution of the decay probabilities appears at the edge, dubbed edge burst. It is proposed that the edge burst is originated jointly from the non-Hermitian skin effect (NHSE) and the imaginary gaplessness of the spectrum [Wen-Tan Xue et al., Phys. Rev. Lett. 128, 120401 (2022)]. Using a particular one-dimensional lossy lattice with a nonuniform loss rate, we show that the edge burst can occur even in the absence of skin localization. Furthermore, we discuss that the edge burst may not appear if the spectrum satisfies the imaginary gaplesness condition. Aside from its fundamental importance, by removing the restrictions on observing the edge burst effect, our results open the door to broader design space for future applications of the edge burst effect.