Coupling a single nitrogen-vacancy center to a superconducting flux qubit in the far-off-resonance regime

Abstract : We present a theoretical proposal to couple a single nitrogen-vacancy (NV) center to a superconducting flux qubit in the regime where both systems are off resonance. The coupling between both quantum devices is achieved through the strong driving of the flux qubit by a classical microwave field that creates dressed states with an experimentally controlled characteristic frequency. We discuss several applications such as controlling the NV center's state by manipulation of the flux qubit, performing the NV center full tomography and using the NV center as a quantum memory. The effect of decoherence and its consequences to the proposed applications are also analyzed. Our results provide a theoretical framework describing a promising hybrid system for quantum information processing, which combines the advantages of fast manipulation and long coherence times.
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Tom Douce, Michael Stern, Nicim Zagury, Patrice Bertet, Pérola Milman. Coupling a single nitrogen-vacancy center to a superconducting flux qubit in the far-off-resonance regime. Physical Review A, American Physical Society, 2015, 92, pp.052335. ⟨10.1103/PhysRevA.92.052335⟩. ⟨cea-01366679⟩

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