Non-Hermiticity enhanced topological immunity of one-dimensional $p$-wave superconducting chain

Min Liu; Yue Zhang; Rui Tian; Xiayao He; Tianhao Wu; Maksims Arzamasovs; Shuai Li; Bo Liu

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arXiv · 2501.05010

Non-Hermiticity enhanced topological immunity of one-dimensional $p$-wave superconducting chain

Min Liu·Yue Zhang·Rui Tian·Xiayao He·Tianhao Wu·Maksims Arzamasovs·Shuai Li·Bo Liu

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Abstract

Studying the immunity of topological superconductors against non-local disorder is one of the key issues in both fundamental researches and potential applications. Here, we demonstrate that the non-Hermiticity can enhance the robustness of topological edge states against non-local disorder. To illustrate that, we consider a one-dimensional (1D) generalized Kitaev model with the asymmetric hopping in the presence of disorder. It is shown that the region supporting Majorana zero modes (MZMs) against non-local disorder will be enlarged by the non-Hermiticity. Through both the numerical and analytical analyses, we show that non-Hermiticity can stabilize the topological superconducting (SC) phase against higher disorder strength. Our studies would offer new insights into the interplay between non-Hermiticity and topology.

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cond-mat.supr-con cond-mat.mes-hall cond-mat.quant-gas quant-ph

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Min Liu, Yue Zhang, Rui Tian, Xiayao He, Tianhao Wu, Maksims Arzamasovs, Shuai Li, Bo Liu. 2025-01-09. Non-Hermiticity enhanced topological immunity of one-dimensional $p$-wave superconducting chain. https://arxiv.org/abs/2501.05010

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