Underlying mechanisms of the self-sustained oscillation of a nanomechanical stochastic resonator in a liquid
نویسنده
چکیده
We study the stochastic response of a nanomechanical resonator in a liquid connected to a feedback loop to increase the quality Q factor. We distinguish two regimes in the oscillation. Below a critical value of the feedback gain, an effective increase of the Q factor and temperature is produced. When the gain surpasses the critical value, the resonator initially behaves as having negative damping until the saturation of the system comes into play and a steady situation is reached. In this regime, frequency stabilities of about 1 part per 106 can be achieved.
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