Pump up the signal with a dash of noise
A noise-sensitive silicon beam could be the basis of a new type of computer memory
MIX some static over a DJ's tunes and you will surely kill the party. Do the same to the vibrations of a nanoscale silicon beam, and it will transform the way it responds to feeble signals. The device, which exploits a phenomenon called stochastic resonance, could act as the basis of a sensitive probe for tiny forces, or as a mechanical alternative to conventional computer memory....
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