双熵随机共振
Double Entropic Stochastic Resonance
摘要：
我们证明了一个纯粹的熵随机共振（ESR）发生在一个几何约束系统，不规则的边界引起熵障碍的外观。周期性输入信号、恒定偏置和固有热噪声之间的相互作用导致微弱信号被放大的共振ESR现象。这种新现象的特征在于在噪声强度的相应最佳值处的频谱放大中存在两个峰值。主峰与涉及井间噪声激活动力学的明显随机共振同步机制相关联，而第二峰与井内动力学的最佳灵敏度的状态相关。ESR的性质，发生时的障碍的起源是熵，而不是充满活力的，提供了新的调查和潜在的应用新的视角。ESR本身提出了另一种情况下，建设性地可以收获噪声驱动非平衡系统。
英文摘要：
We demonstrate the appearance of a purely entropic stochastic resonance (ESR) occurring in a geometrically confined system, where the irregular boundaries cause entropic barriers. The interplay between a periodic input signal, a constant bias and intrinsic thermal noise leads to a resonant ESR-phenomenon in which feeble signals become amplified. This new phenomenon is characterized by the presence of two peaks in the spectral amplification at corresponding optimal values of the noise strength. The main peak is associated with the manifest stochastic resonance synchronization mechanism involving the inter-well noise-activated dynamics while a second peak relates to a regime of optimal sensitivity for intra-well dynamics. The nature of ESR, occurring when the origin of the barrier is entropic rather than energetic, offers new perspectives for novel investigations and potential applications. ESR by itself presents yet another case where one constructively can harvest noise in driven nonequilibrium systems.
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