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

• URL: http://arxiv.org/abs/2501.05010v1
• Date: Thu, 09 Jan 2025 07:11:54 GMT
• Title: Non-Hermiticity enhanced topological immunity of one-dimensional $p$-wave superconducting chain
• Authors: Min Liu, Yue Zhang, Rui Tian, Xiayao He, Tianhao Wu, Maksims Arzamasovs, Shuai Li, Bo Liu,
• Abstract summary: We show that the non-Hermiticity can enhance the robustness of topological edge states against non-local disorder. It is shown that the region supporting Majorana zero modes (MZMs) against non-local disorder will be enlarged by the non-Hermiticity.
• Score: 24.629252058356485
• License:
• 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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