Entanglement and decoherence of a micromechanical resonator via coupling to a Cooper-pair box.
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.
Armour
A D
AD
Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BW, United Kingdom.
Blencowe
M P
MP
Schwab
K C
KC