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Phys Rev Lett. 2002 Apr 8;88(14):148301. Epub 2002 Mar 20.

Entanglement and decoherence of a micromechanical resonator via coupling to a Cooper-pair box.

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  • 1Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BW, United Kingdom.


We analyze the quantum dynamics of a micromechanical resonator capacitively coupled to a Cooper-pair box. With appropriate quantum state control of the Cooper box, the resonator can be driven into a superposition of spatially separated states. The Cooper box can also be used to probe the decay of the resonator superposition state due to environmental decoherence.

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