Discrete-time quadrature feedback cooling of a radio-frequency mechanical resonator

We have employed a feedback cooling scheme, which combines high-frequency mixing with digital signal processing. The frequency and damping rate of a 2 MHz micromechanical resonator embedded in a dc SQUID are adjusted with the feedback, and active cooling to a temperature of 14.3 mK is demonstrated....

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Veröffentlicht in:	arXiv.org 2011-06
Hauptverfasser:	Poot, M, Etaki, S, Yamaguchi, H, H S J van der Zant
Format:	Artikel
Sprache:	eng
Schlagworte:	Cooling Damping Digital signal processing Feedback Physics - Mesoscale and Nanoscale Physics Resonators
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	We have employed a feedback cooling scheme, which combines high-frequency mixing with digital signal processing. The frequency and damping rate of a 2 MHz micromechanical resonator embedded in a dc SQUID are adjusted with the feedback, and active cooling to a temperature of 14.3 mK is demonstrated. This technique can be applied to GHz resonators and allows for flexible control strategies.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1106.2106