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Storage of Multiple Coherent Microwave Excitations in an Electron Spin Ensemble

Hua Wu, Richard E. George, Janus H. Wesenberg, Klaus Mølmer, David I. Schuster, Robert J. Schoelkopf, Kohei M. Itoh, Arzhang Ardavan, John J. L. Morton, and G. Andrew D. Briggs
Phys. Rev. Lett. 105, 140503 – Published 27 September 2010
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Abstract

Strong coupling between a microwave photon and electron spins, which could enable a long-lived quantum memory element for superconducting qubits, is possible using a large ensemble of spins. This represents an inefficient use of resources unless multiple photons, or qubits, can be orthogonally stored and retrieved. Here we employ holographic techniques to realize a coherent memory using a pulsed magnetic field gradient and demonstrate the storage and retrieval of up to 100 weak 10 GHz coherent excitations in collective states of an electron spin ensemble. We further show that such collective excitations in the electron spin can then be stored in nuclear spin states, which offer coherence times in excess of seconds.

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  • Received 18 June 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.140503

© 2010 The American Physical Society

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Towards superconductor-spin ensemble hybrid quantum systems

Published 27 September 2010

Ensembles of dilute spin impurities in condensed matter systems can be accessed using microelectronic circuits and therefore may offer a way for long-term storage and enhanced processing of quantum information.

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Authors & Affiliations

Hua Wu1, Richard E. George2, Janus H. Wesenberg1, Klaus Mølmer3, David I. Schuster4, Robert J. Schoelkopf4, Kohei M. Itoh5, Arzhang Ardavan2, John J. L. Morton1,2, and G. Andrew D. Briggs1

  • 1Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom
  • 2Clarendon Laboratory, Department of Physics, Oxford University, Oxford OX1 3PU, United Kingdom
  • 3Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C., Denmark
  • 4Departments of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
  • 5School of Fundamental Science and Technology, Keio University, Yokohama 223-8522, Japan

See Also

High-Cooperativity Coupling of Electron-Spin Ensembles to Superconducting Cavities

D. I. Schuster, A. P. Sears, E. Ginossar, L. DiCarlo, L. Frunzio, J. J. L. Morton, H. Wu, G. A. D. Briggs, B. B. Buckley, D. D. Awschalom, and R. J. Schoelkopf
Phys. Rev. Lett. 105, 140501 (2010)

Strong Coupling of a Spin Ensemble to a Superconducting Resonator

Y. Kubo, F. R. Ong, P. Bertet, D. Vion, V. Jacques, D. Zheng, A. Dréau, J.-F. Roch, A. Auffeves, F. Jelezko, J. Wrachtrup, M. F. Barthe, P. Bergonzo, and D. Esteve
Phys. Rev. Lett. 105, 140502 (2010)

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Vol. 105, Iss. 14 — 1 October 2010

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