Scientific Results

Enhancing Sideband Cooling by Feedback-Controlled Light

Year: 2017

Authors: Rossi M., Kralj N., Zippilli S., Natali R., Borrielli A., Pandraud G., Serra E., Di Giuseppe G., Vitali D.

Autors Affiliation: Univ Camerino, Sch Higher Studies C Urbani, I-62032 Camerino, MC, Italy; Univ Camerino, Phys Div, Sch Sci & Technol, I-62032 Camerino, MC, Italy; INFN, Sez Perugia, I-06123 Perugia, PG, Italy; Inst Mat Elect & Magnetism, Nanosci Trento FBK Div, I-38123 Povo, TN, Italy; Delft Univ Technol, Else Kooi Lab, NL-2628 Delft, Netherlands; Ist Nazl Fis Nucl, TIFPA, I-38123 Povo, TN, Italy; CNR INO, Lgo Enrico Fermi 6, I-50125 Florence, Italy

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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 119 (12)      Pages from: 123603  to: 123603

More Information: We acknowledge the support of the European Union
DOI: 10.1103/PhysRevLett.119.123603

Citations: 16
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English