Abstract
Stochastic resonance (SR) is investigated in a two-coupled oscillator system with time delay and a pinning force. Each oscillator is driven by a periodic signal and Gaussian white noise. Periodic signals at their inputs have equal amplitude but different frequencies. We find that each oscillator's SR behavior, which is described by the change of the signal-to-noise ratio (SNR) at the frequency of the signal into itself against the noise intensity, is in good agreement with that of the corresponding uncoupled single oscillator. In addition, the output SNR of one oscillator at the frequency of the signal into the other oscillator also demonstrates SR-like behavior with the increment of noise intensity. The results indicate the coexistence of decoupling and coupling effects and have implications in the area of information transmission in coupled-element neural network.
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