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Thermal mechanical motion hinders the use of a mechanical system in applications such as quantum information processing. A straightforward, but technically challenging, approach to overcome the thermal motion is to cool the mechanical oscillator to its motional ground state. An alternative approach, as proposed recently, is to exploit the use of a mechanically-dark mode, which is a special coherent...
We demonstrate an optomechanical dark mode that converts fields between two optical modes, but is decoupled from the mechanical oscillator. The dark mode can enable mechanically-mediated quantum-state-transfer, without cooling the mechanical system to its ground state.
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