Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode

Details Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode

2011-07-19

arxiv.org/abs/1107.3761v1

Physics

Quantum Physics

23 pages, 11 figures

Scientific paper

Quantum control of engineered mechanical oscillators can be achieved by coupling the oscillator to an auxiliary degree of freedom, provided that the coherent rate of energy exchange exceeds the decoherence rate of each of the two sub-systems. We achieve such quantum-coherent coupling between the mechanical and optical modes of a micro-optomechanical system. Simultaneously, the mechanical oscillator is cooled to an average occupancy of n = 1.7 \pm 0.1 motional quanta. Pulsed optical excitation reveals the exchange of energy between the optical light field and the micromechanical oscillator in the time domain at the level of less than one quantum on average. These results provide a route towards the realization of efficient quantum interfaces between mechanical oscillators and optical fields.

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