Enhancing Sideband Cooling by Feedback-Controlled Light

Massimiliano Rossi; Nenad Kralj; Stefano Zippilli; Riccardo Natali; Antonio Borrielli; Gregory Pandraud; Enrico Serra; Giovanni Di Giuseppe; David Vitali

doi:10.1103/PhysRevLett.119.123603

Enhancing Sideband Cooling by Feedback-Controlled Light

Massimiliano Rossi, Nenad Kralj, Stefano Zippilli, Riccardo Natali, Antonio Borrielli, Gregory Pandraud, Enrico Serra, Giovanni Di Giuseppe, David Vitali

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Abstract

We realize a phase-sensitive closed-loop control scheme to engineer the fluctuations of the pump field which drives an optomechanical system and show that the corresponding cooling dynamics can be significantly improved. In particular, operating in the counterintuitive "antisquashing" regime of positive feedback and increased field fluctuations, sideband cooling of a nanomechanical membrane within an optical cavity can be improved by 7.5 dB with respect to the case without feedback. Close to the quantum regime of reduced thermal noise, such feedback-controlled light would allow going well below the quantum backaction cooling limit.

Original language	English
Article number	123603
Journal	Physical Review Letters
Volume	119
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.119.123603
Publication status	Published - 2017

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AU - Rossi, Massimiliano

AU - Kralj, Nenad

AU - Zippilli, Stefano

AU - Natali, Riccardo

AU - Borrielli, Antonio

AU - Pandraud, Gregory

AU - Serra, Enrico

AU - Di Giuseppe, Giovanni

AU - Vitali, David

PY - 2017

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AB - We realize a phase-sensitive closed-loop control scheme to engineer the fluctuations of the pump field which drives an optomechanical system and show that the corresponding cooling dynamics can be significantly improved. In particular, operating in the counterintuitive "antisquashing" regime of positive feedback and increased field fluctuations, sideband cooling of a nanomechanical membrane within an optical cavity can be improved by 7.5 dB with respect to the case without feedback. Close to the quantum regime of reduced thermal noise, such feedback-controlled light would allow going well below the quantum backaction cooling limit.

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Enhancing Sideband Cooling by Feedback-Controlled Light

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