Delayed-response quantum back-action in nanoelectromechanical systems
S. N. Shevchenko, D. G. Rubanov, and Franco Nori
TL;DR
This paper develops a semiclassical model describing how a quantum dot's delayed response influences a nanomechanical resonator's dynamics, affecting its frequency and damping, with implications for amplification and cooling.
Contribution
It introduces a theoretical framework for understanding delayed quantum back-action effects on nanomechanical resonators, highlighting the role of quantum dots in modulating resonator properties.
Findings
Quantum back-action alters resonant frequency.
Quantum back-action modifies quality factor.
Potential for resonator cooling or amplification.
Abstract
We present a semiclassical theory for the delayed response of a quantum dot (QD) to oscillations of a coupled nanomechanical resonator (NR). We prove that the back-action of the QD changes both the resonant frequency and the quality factor of the NR. An increase or decrease in the quality factor of the NR corresponds to either an enhancement or damping of the oscillations, which can also be interpreted as Sisyphus amplification or cooling of the NR by the QD.
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