Enhanced avionic sensing based on Wigner's cusp anomalies.

Enhanced avionic sensing based on Wigner's cusp anomalies.
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DOI:
10.1126/sciadv.abg8118
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发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Kottos T
Kottos T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kononchuk R;Feinberg J;Knee J;Kottos T

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出现在新打开的通道附近的差动横截面尖端用于增强航空电子传感。典型的传感器通过使用线性响应原理(LRP)测量其对物理可观测对象的影响来检测微小扰动。事实证明,一旦LRP被抛弃,新的机会就会出现。一个突出的例子是工作在N阶例外点简并(EPD)附近的共振系统,其中一个小的扰动ε≪1激活了共振分裂中固有的次线性响应。在这里,我们提出了一种替代的次线性光学机械传感方案,它植根于Wigner尖点反常(WCA),首先在核反应的框架下讨论:在新开放的通道的能量阈值附近的微分散射截面的频率相关平方根奇异性,我们利用它来放大小的微扰。除了本文所讨论的光机械加速度计之外,WCA超灵敏还可以应用于各种传感应用。我们的WCA平台结构紧凑,不需要合理安排有源元件(与环保署平台不同),如果选择,可以是无空洞的。
Differential cross-sectional cusps, occurring at the vicinity of newly open channels, are used for enhanced avionic sensing. Typical sensors detect small perturbations by measuring their effects on a physical observable, using a linear response principle (LRP). It turns out that once LRP is abandoned, new opportunities emerge. A prominent example is resonant systems operating near Nth-order exceptional point degeneracies (EPDs) where a small perturbation ε ≪ 1 activates an inherent sublinear response in resonant splitting. Here, we propose an alternative sublinear optomechanical sensing scheme that is rooted in Wigner’s cusp anomalies (WCAs), first discussed in the framework of nuclear reactions: a frequency-dependent square-root singularity of the differential scattering cross section around the energy threshold of a newly opened channel, which we use to amplify small perturbations. WCA hypersensitivity can be applied in a variety of sensing applications, besides optomechanical accelerometry discussed in this paper. Our WCA platforms are compact, do not require a judicious arrangement of active elements (unlike EPD platforms), and, if chosen, can be cavity free.
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期刊: Sensors (Basel, Switzerland)
影响因子: --
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