Quantum Computing with an Electron Spin Ensemble

J. H. Wesenberg, A. Ardavan, G. A. D. Briggs, J. J. L. Morton, R. J. Schoelkopf, D. I. Schuster, and K. Mølmer

Phys. Rev. Lett. 103, 070502 – Published 11 August 2009

Abstract

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.

Received 20 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.070502

Authors & Affiliations

J. H. Wesenberg¹, A. Ardavan², G. A. D. Briggs¹, J. J. L. Morton^1,2, 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

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Issue

Vol. 103, Iss. 7 — 14 August 2009

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