Logical Stochastic Resonance with a Coulomb-Coupled Quantum-Dot Rectifier

Although noise is usually undesirable, by means of stochastic resonance it can actually be exploited, for example to improve the performance and switch the functionality of nanoelectronic systems. The authors demonstrate a device that rectifies voltage fluctuations and changes its behavior controllably to act as any of four logic gates. These findings lay the physical groundwork for energy-efficient, noise-tolerant, and autonomous electronics, and the particular device is based on the mature GaAs/(Al,Ga)As system, suggesting straightforward integration with existing technology.