Document Type
Article
Publication Date
4-13-2023
Abstract
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, referred to as an edge burst. It is proposed that the edge burst originates jointly from the non-Hermitian skin effect (NHSE) and the imaginary gaplessness of the spectrum [W.-T. 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 localizations. Furthermore, we discuss that the edge burst may not appear if the spectrum satisfies the imaginary gapless 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.
Recommended Citation
Yuce, Cem, and H. Ramezani. "Non-Hermitian edge burst without skin localization." Physical Review B 107.14 (2023): L140302. https://doi.org/10.1103/PhysRevB.107.L140302
Publication Title
Physical Review B
DOI
https://doi.org/10.1103/PhysRevB.107.L140302
Comments
© 2023 American Physical Society. Original published version available at https://doi.org/10.1103/PhysRevB.107.L140302