Delayed-response quantum back action in nanoelectromechanical systems

Delayed-response quantum back action in nanoelectromechanical systems

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...

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Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-04, Vol.91 (16), Article 165422
Hauptverfasser: Shevchenko, S. N., Rubanov, D. G., Nori, Franco
Format: Artikel
Sprache:eng
Schlagworte:
Amplification
Condensed matter
Damping
Nanostructure
Oscillations
Quality factor
Quantum dots
Resonant frequencies
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Zusammenfassung: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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.91.165422