The noise makes the signal: what a small fry should know about stochastic resonance. (English) Zbl 1069.81086

Summary: We are traditionally educated to consider noise a nuisance, hindering the transmission and detection of signals. Recently, however, the paradigm of stochastic resonance (SR) proved this assertion wrong: indeed, the appropriate amount of noise can facilitate signal detection in noisy environments. Due to its simplicity and robustness, SR has been implemented by mother nature on almost any scale, from celestial mechanics to ion channels. The present mini-review outlines the basic mechanism underlying SR phenomena, and discusses recent quantum optical scenarios, in the deep quantum regime.


81V80 Quantum optics
60H40 White noise theory
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