Various external driving forces can induce logical stochastic or vibrational resonance, such as noise, harmonics, and the combination of noise and harmonics. In engineering, using harmonics as driving force is more conducive to the control of logic operations, while a wider optimal parameter region and a shorter switching time are expected in practice to improve the robustness and response speed of system. Here, we report the logical vibrational resonance in a two-well potential system subjected to biharmonics. Our results show that the variable frequency (VF) (one harmonic) could broaden the ...
