تقرير
Disorder-induced acoustic non-Hermitian skin effect
| العنوان: | Disorder-induced acoustic non-Hermitian skin effect |
|---|---|
| المؤلفون: | Wang, Bing-bing, Cheng, Zheyu, Zou, Hong-yu, Ge, Yong, Zhao, Ke-qi, Si, Qiao-rui, Yuan, Shou-qi, Sun, Hong-xiang, Xue, Haoran, Zhang, Baile |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Classical Physics, Condensed Matter - Disordered Systems and Neural Networks |
| الوصف: | The interplay between disorder and topology leads to rich phenomena such as topological Anderson insulator phases, where disorder opens a topological bandgap and thereby enhances transport. With the recent advances in non-Hermitian topological physics, topological Anderson insulators have been generalized to systems with non-Hermitian disorder. However, achieving disorder-induced nontrivial point-gap topology, which is unique to non-Hermitian systems and is responsible for non-Hermitian skin effect, remains elusive. In this work, we experimentally realized non-Hermitian disorder-induced point-gap topology in a one-dimensional acoustic crystal. By controlling the gain factor of the amplifier in each basic unit, we obtained a series of disordered unidirectional hoppings with tunable strength. Using disordered acoustic crystals under open boundary conditions, we observed the emergence of non-Hermitian skin effect and the direction reversal of skin mode localization when the disorder strength is tuned. These results serve as hallmarks of point-gap topological phase transition induced by non-Hermitian disorder. Our work paves the way for exploring various disorder-induced phenomena in non-Hermitian acoustic systems. Comment: 7 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.10989 |
| رقم الأكسشن: | edsarx.2402.10989 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |