Real-time feedback control of a mesoscopic superposition

Details Real-time feedback control of a mesoscopic superposition Real-time feedback control of a mesoscopic superposition

2011-03-22

arxiv.org/abs/1103.4332v1

Phys. Rev. A 83, 041801(R) (2011)

Physics

Quantum Physics

4 pages, revtex4, 1 png figure

Scientific paper

We show that continuous real-time feedback can be used to track, control, and protect a mesoscopic superposition of two spatially separated wave-packets. The feedback protocol is enabled by an approximate state-estimator, and requires two continuous measurements, performed simultaneously. For nanomechanical and superconducting resonators, both measurements can be implemented by coupling the resonators to superconducting qubits.

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