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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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Abstract

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

DOI:https://doi.org/10.1103/PhysRevLett.107.220501

© 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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Issue

Vol. 107, Iss. 22 — 25 November 2011

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