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arXiv · 2604.13808

Non-Hermitian reshaping of high-order Landau modes

Zhihao Wang·Jie Jiang·Yanji Zheng·Wen Zhao·Chenyang Wang·Zhiwei Guo·Yong-Chun Liu·Shuang Zhang·Cuicui Lu
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Abstract

When charged particles are subjected to strong magnetic fields, they form discrete energy levels known as Landau levels. The Landau levels consist of a series of degenerate states of Landau modes, making them a promising platform for large-capacity information processing. However, to date, exploiting the high-order Landau modes and control their spatial distributions has remained elusive. Here, we propose to construct magnetic fields, electric fields, and imaginary momentum simultaneously to reshape high-order Landau modes in non-Hermitian systems. By building a non-Hermitian electric circuit platform, we experimentally realize pseudomagnetic fields via inhomogeneous coupling and pseudoelectric fields via a gradient on-site potential, while simultaneously introducing an imaginary momentum via non-reciprocal coupling. We directly observe multi-frequency single-peak localization of high-order Landau modes. Our work provides a universal method for manipulating high-order Landau modes and exploring applications in nonHermitian systems, such as frequency multiplexing and wave packet reshaping.

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Zhihao Wang, Jie Jiang, Yanji Zheng, Wen Zhao, Chenyang Wang, Zhiwei Guo, Yong-Chun Liu, Shuang Zhang, Cuicui Lu. 2026-04-15. Non-Hermitian reshaping of high-order Landau modes. https://doi.org/10.1016/j.scib.2026.03.020

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