Noise-assisted morphing of memory and logic function

We demonstrate how noise allows a bistable system to behave as a memory device, as well as a logic gate. Namely, in some optimal range of noise, the system can operate flexibly, both as a NAND/AND gate and a Set–Reset latch, by varying an asymmetrizing bias. Thus we show how this system implements memory, even for sub-threshold input signals, using noise constructively to store information. This can lead to the development of reconfigurable devices, that can switch efficiently between memory tasks and logic operations.

► We consider a nonlinear system in a noisy environment.
► We show that the system can function as a robust memory element.
► Further, the response of the system can be easily morphed from memory to logic operations.
► Such systems can potentially act as building blocks of “smart” computing devices.