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APS » Journals » Phys. Rev. Lett. » Volume 103 » Issue 7
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Phys. Rev. Lett. 103, 070502 (2009) [4 pages]

Quantum Computing with an Electron Spin Ensemble

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J. H. Wesenberg1, A. Ardavan2, G. A. D. Briggs1, J. J. L. Morton1,2, R. J. Schoelkopf3, D. I. Schuster3, and K. Mølmer4
1Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
2Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PH, United Kingdom
3Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
4Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, 8000 Aarhus C, Denmark

Received 20 March 2009; published 11 August 2009

We propose to encode a register of quantum bits in different collective electron spin wave excitations in a solid medium. Coupling to spins is enabled by locating them in the vicinity of a superconducting transmission line cavity, and making use of their strong collective coupling to the quantized radiation field. The transformation between different spin waves is achieved by applying gradient magnetic fields across the sample, while a Cooper pair box, resonant with the cavity field, may be used to carry out one- and two-qubit gate operations.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.070502
DOI:
10.1103/PhysRevLett.103.070502
PACS:
03.67.Lx, 33.90.+h, 42.70.Ln, 85.25.Cp
 
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