Povinelli M L, Coppersmith S N, Kadanoff L P, Nagel S R, Venkataramani S C
The James Franck Institute, The University of Chicago, 5640 Ellis Avenue, Chicago, Illinois 60637, USA.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 May;59(5 Pt A):4970-82. doi: 10.1103/physreve.59.4970.
We investigate a nonlinear dynamical system which "remembers" preselected values of a system parameter. The deterministic version of the system can encode many parameter values during a transient period, but in the limit of long times, almost all of them are forgotten. Here we show that a certain type of stochastic noise can stabilize multiple memories, enabling many parameter values to be encoded permanently. We present analytic results that provide insight both into the memory formation and into the noise-induced memory stabilization. The relevance of our results to experiments on the charge-density wave material NbSe3 is discussed.
我们研究了一个能“记住”系统参数预选值的非线性动力系统。该系统的确定性版本在瞬态期间可以编码许多参数值，但在长时间极限情况下，几乎所有这些值都会被遗忘。在此我们表明，某类随机噪声可以稳定多个记忆，使许多参数值能够被永久编码。我们给出的解析结果为记忆形成以及噪声诱导的记忆稳定提供了见解。还讨论了我们的结果与电荷密度波材料NbSe3实验的相关性。
