STOCHASTIC RESONANCE IN A BALANCED PAIR OF SINGLE-ELECTRON BOXES

摘要

Stochastic resonance in a fundamental single-electron circuit, i.e., a balanced pair ofnsingle-electron boxes, is observed and presented theoretically, where the signal-to-noisenratio (SNR) of the internal states stimulated by responding to a periodic subthresholdnor suprathreshold input is enhanced by thermal agitation in tunneling junctions.nThrough extensive Monte-Carlo simulations, the peak SNR was determined as a functionnof temperature and input amplitudes. These results imply the possibility to designnsingle-electron circuits that may “exploit” thermal noise, instead of employing conventionalnnoise-suppression strategies.