Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond

Abstract

Electron-spin nitrogen-vacancy color centers in diamond are a natural candidate to act as a quantum memory for superconducting qubits because of their large collective coupling and long coherence times. We report here the first demonstration of strong coupling and coherent exchange of a single quantum of energy between a flux-qubit and an ensemble of nitrogen-vacancy color centers.

5 pages, 4 figures, already published in the 13th October 2011 issue of Nature journal

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