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

Xiaobo Zhu, Shiro Saito, Alexander Kemp, Kosuke Kakuyanagi, Shin-ichi Karimoto, Hayato Nakano, William J. Munro, Yasuhiro Tokura, Mark S. Everitt, Kae Nemoto, Makoto Kasu, Norikazu Mizuochi and Kouichi Semba ()
Additional contact information
Xiaobo Zhu: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Shiro Saito: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Alexander Kemp: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Kosuke Kakuyanagi: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Shin-ichi Karimoto: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Hayato Nakano: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
William J. Munro: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Yasuhiro Tokura: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Mark S. Everitt: National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan
Kae Nemoto: National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan
Makoto Kasu: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Norikazu Mizuochi: University of Osaka, Graduate school of Engineering Science, 1-3 Machikane-yama, Toyonaka, Osaka 560-8531, Japan
Kouichi Semba: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan

Nature, 2011, vol. 478, issue 7368, 221-224

Abstract: Quantum hybrids Hybrid quantum devices, in which a superconducting qubit is coupled to a dedicated quantum memory based on natural atomic or molecular ensembles, are promising for quantum information processing. However, it has not been clear whether the required strength of coherent quantum coupling could be achieved. Zhu et al. improve the prospects of such technology, demonstrating coherent strong coupling and exchange of a quantum of energy between a superconducting flux qubit and an ensemble of electron spins associated with nitrogen-vacancy defects in diamond.

Date: 2011
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DOI: 10.1038/nature10462

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