Stochastic memory: memory enhancement due to noise

TL;DR

This paper demonstrates that white noise can induce hysteresis in certain memory elements, like TiO2-based resistors, even at low frequencies, revealing a noise-enhanced memory effect with potential experimental and practical implications.

Contribution

The study introduces the concept of noise-induced hysteresis in memory resistors, expanding understanding of noise effects on memory systems beyond traditional periodic stimuli.

Findings

White noise can induce hysteresis in memory resistors.

Hysteresis occurs even at very low frequencies of external driving.

Implications for designing noise-assisted memory devices.

Abstract

There are certain classes of resistors, capacitors and inductors that, when subject to a periodic input of appropriate frequency, develop hysteresis loops in their characteristic response. Here, we show that the hysteresis of such memory elements can also be induced by white noise of appropriate intensity even at very low frequencies of the external driving field. We illustrate this phenomenon using a physical model of memory resistor realized by $\mathrm{TiO_2}$ thin films sandwiched between metallic electrodes, and discuss under which conditions this effect can be observed experimentally. We also discuss its implications on existing memory systems described in the literature and the role of colored noise.