Fast feedback control of mechanical motion using circuit optomechanics
- URL: http://arxiv.org/abs/2211.15645v1
- Date: Mon, 28 Nov 2022 18:52:23 GMT
- Title: Fast feedback control of mechanical motion using circuit optomechanics
- Authors: Cheng Wang, Louise Banniard, Laure Mercier de L\'epinay, and Mika A.
Sillanp\"a\"a
- Abstract summary: Measurement-based control, utilizing an active feedback loop, is a standard tool in technology.
Here, we realize measurement-based feedback operations in an electromechanical system, cooling the mechanical thermal noise down to 3 quanta.
We also obtain significant cooling when the system is pumped at the blue optomechanical sideband, where the system is unstable without feedback.
- Score: 7.692990114604929
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Measurement-based control, utilizing an active feedback loop, is a standard
tool in technology. Feedback control is also emerging as a useful and
fundamental tool in quantum technology and in related fundamental studies,
where it can be used to prepare and stabilize pure quantum states in various
quantum systems. Feedback-cooling of center-of-mass micromechanical
oscillators, which typically exhibit a high thermal noise far above the quantum
regime has been particularly actively studied and has recently been shown to
allow for ground-state cooling using optical measurements. Here, we realize
measurement-based feedback operations in an electromechanical system, cooling
the mechanical thermal noise down to 3 quanta, limited by added amplifier
noise. Counter-intuitively, we also obtain significant cooling when the system
is pumped at the blue optomechanical sideband, where the system is unstable
without feedback.
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