High-sensitivity optical monitoring of a micro-mechanical resonator with a quantum-limited optomechanical sensor

Details High-sensitivity optical monitoring of a micro-mechanical resonator with a quantum-limited optomechanical sensor High-sensitivity optical monitoring of a micro-mechanical resonator with a quantum-limited optomechanical sensor

2006-05-19

arxiv.org/abs/quant-ph/0605174v1

Phys. Rev. Lett. 97 (2006) 133601

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.133601

We experimentally demonstrate the high-sensitivity optical monitoring of a micro-mechanical resonator and its cooling by active control. Coating a low-loss mirror upon the resonator, we have built an optomechanical sensor based on a very high-finesse cavity (30000). We have measured the thermal noise of the resonator with a quantum-limited sensitivity at the 10^-19 m/rootHz level, and cooled the resonator down to 5K by a cold-damping technique. Applications of our setup range from quantum optics experiments to the experimental demonstration of the quantum ground state of a macroscopic mechanical resonator.

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