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

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

2011-06-10

arxiv.org/abs/1106.2106v1

Applied Physics Letters 99, 013113 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To appear in Appl. Phys. Lett

Scientific paper

10.1063/1.3608148

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.

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