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Logical Stochastic Resonance
Logical Stochastic Resonance
The phenomenon of logical stochastic resonance (LSR) shows how a bistable or multistable nonlinear dynamical system can function as a logic gate or memory device by exploiting the constructive interplay of noise and nonlinearity. The response can be obtained even for subthreshold signals. The correct logical response is obtained in an optimal window of moderate noise. The functionality of the system can be switched between various gates and latch by variation of an asymmetrizing bias. The same response can be obtained with a periodic forcing such as a sinusoidal or square wave instead of noise. Furthermore, the optimal noise window can be enhanced by addition of periodic forcing so that, under low noise conditions, periodic forcing can enable the robust operation of the device.