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Hybrid Quantum Circuit with a Superconducting Qubit Coupled to a Spin Ensemble

Y. Kubo, C. Grezes, A. Dewes, T. Umeda, J. Isoya, H. Sumiya, N. Morishita, H. Abe, S. Onoda, T. Ohshima, V. Jacques, A. Dréau, J.-F. Roch, I. Diniz, A. Auffeves, D. Vion, D. Esteve, and P. Bertet
Phys. Rev. Lett. 107, 220501 – Published 21 November 2011
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We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy centers in a diamond crystal via a frequency-tunable superconducting resonator acting as a quantum bus. Using this circuit, we prepare a superposition of the qubit states that we store into collective excitations of the spin ensemble and retrieve back into the qubit later on. These results constitute a proof of concept of spin-ensemble based quantum memory for superconducting qubits.

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  • Received 19 October 2011


© 2011 American Physical Society

Authors & Affiliations

Y. Kubo1, C. Grezes1, A. Dewes1, T. Umeda2, J. Isoya2, H. Sumiya3, N. Morishita4, H. Abe4, S. Onoda4, T. Ohshima4, V. Jacques5, A. Dréau5, J.-F. Roch5, I. Diniz6, A. Auffeves6, D. Vion1, D. Esteve1, and P. Bertet1

  • 1Quantronics group, SPEC (CNRS URA 2464), IRAMIS, DSM, CEA-Saclay, 91191 Gif-sur-Yvette, France
  • 2Research Center for Knowledge Communities, University of Tsukuba, Tsukuba 305-8550, Japan
  • 3Sumitomo Electric Industries Ltd., Itami 664-001, Japan
  • 4Japan Atomic Energy Agency, Takasaki 370-1292, Japan
  • 5LPQM (CNRS UMR 8537), ENS de Cachan, 94235 Cachan, France
  • 6Institut Néel, CNRS, BP 166, 38042 Grenoble, France

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Vol. 107, Iss. 22 — 25 November 2011

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This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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