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arXiv · 2410.14487

Generic non-Hermitian mobility edges in a class of duality-breaking quasicrystals

Xiang-Ping Jiang·Mingdi Xu·Lei Pan
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Abstract

We provide approximate solutions for the mobility edge (ME) that demarcates localized and extended states within a specific class of one-dimensional non-Hermitian (NH) quasicrystals. These NH quasicrystals exhibit a combination of nonreciprocal hopping terms and complex quasiperiodic on-site potentials. Our analytical approach is substantiated by rigorous numerical calculations, demonstrating significant accuracy. Furthermore, our ansatz closely agrees with the established limiting cases of the NH Aubry-Andr{\'e}-Harper (AAH) and Ganeshan-Pixley-Das Sarma (GPD) models, which have exact results, thereby enhancing its credibility. Additionally, we have examined their dynamic properties and discovered distinct behaviors in different regimes. Our research provides a practical methodology for estimating the position of MEs in a category of NH quasicrystals that break duality.

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Xiang-Ping Jiang, Mingdi Xu, Lei Pan. 2024-10-18. Generic non-Hermitian mobility edges in a class of duality-breaking quasicrystals. https://doi.org/10.1016/j.rinp.2025.108146

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