期刊
PHYSICAL REVIEW LETTERS
卷 125, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.180403
关键词
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资金
- German Research Foundation (DFG) [SFB 1143]
- Swedish Research Council (VR)
- Wallenberg Academy Fellows program of the Knut and Alice Wallenberg Foundation
- German Research Foundation (DFG) through the Cluster of Excellence ct.qmat
We introduce and study a novel class of sensors whose sensitivity grows exponentially with the size of the device. Remarkably, this drastic enhancement does not rely on any fine-tuning, but is found to be a stable phenomenon immune to local perturbations. Specifically, the physical mechanism behind this striking phenomenon is intimately connected to the anomalous sensitivity to boundary conditions observed in non-Hermitian topological systems. We outline concrete platforms for the practical implementation of these non-Hermitian topological sensors ranging from classical metamaterials to synthetic quantum materials.
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