Stochastic Resonance — Nonlinear Detector

Noise enhances signal detection in bistable systems

Signal A: 0.40

Noise σ: 0.50

Freq ω: 0.20

Barrier h: 1.00

Bistable potential U(x) = −ax²/2 + bx⁴/4 driven by subthreshold signal + noise.
At optimal noise, the system transitions synchronously with the signal — SNR peaks.
Found in sensory neurons, climate models, electronics, quantum systems.