Physical aging of classical oscillators.
Physical aging of classical oscillators.
复制标题
经典振荡器的物理老化
DOI：
10.1103/physrevlett.112.094101
复制
发表时间：
2014
影响因子：
8.6
通讯作者：
H. Meyer-Ortmanns
中科院分区：
文献类型：
--
作者：
F. Ionita;H. Meyer-Ortmanns
老化是自旋玻璃和具有慢弛豫过程、破时平移不变性和动态标度的材料等玻璃系统中常见的现象。我们研究了与受挫键相结合的主动旋转器和Kuramoto振荡器的老化。不动点或极限环解的吸引子的诱导多重性导致了一个粗糙的势景观。当系统暴露于噪声中时，振荡器相位通过这一景观迁移，并从一个亚稳态到下一个亚稳态产生大量不同的逃逸时间。当系统从唯一不动点区域淬灭到多稳定极限环解区域时，自相关函数依赖于淬灭后的等待时间，并表现出动态标度。通过这种方式，我们揭示了在完全不同的认识中衰老背后的共同机制。
Aging is a familiar phenomenon from glassy systems like spin glasses and materials with slow relaxation processes, breaking of time-translation invariance, and dynamical scaling. We study aging in active rotators and Kuramoto oscillators that are coupled with frustrated bonds. The induced multiplicity of attractors of fixed-point or limit-cycle solutions leads to a rough potential landscape. When the system is exposed to noise, the oscillator phases migrate through this landscape and generate a multitude of different escape times from one metastable state to the next. When the system is quenched from the regime of a unique fixed point toward the regime of multistable limit-cycle solutions, the autocorrelation functions depend on the waiting time after the quench and show dynamical scaling. In this way we uncover a common mechanism behind aging in quite different realizations.