Entanglement in a solid-state spin ensemble

Stephanie Simmons, Richard M. Brown, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Mike L. W. Thewalt, Kohei M. Itoh and John J. L. Morton ()
Additional contact information
Stephanie Simmons: Oxford University, Oxford OX1 3PH, UK
Richard M. Brown: Oxford University, Oxford OX1 3PH, UK
Helge Riemann: Leibniz-Institut für Kristallzüchtung, 12489 Berlin, Germany
Nikolai V. Abrosimov: Leibniz-Institut für Kristallzüchtung, 12489 Berlin, Germany
Peter Becker: PTB Braunschweig, 38116 Braunschweig, Germany
Hans-Joachim Pohl: VITCON Projectconsult GmbH, 07743 Jena, Germany
Mike L. W. Thewalt: Simon Fraser University
Kohei M. Itoh: School of Fundamental Science and Technology, Keio University, Yokohama, 3-14-1 Hiyoshi, 223-8522, Japan
John J. L. Morton: Oxford University, Oxford OX1 3PH, UK

Nature, 2011, vol. 470, issue 7332, 69-72

Abstract: Ensemble entanglement Spin ensembles, such as those used in liquid-state nuclear magnetic resonance, have been important for the development of quantum control methods. But these demonstrations contained no entanglement, an essential element for a quantum information processor. Simmons et al. now report the on-demand generation of entanglement between an ensemble of electron and nuclear spins in phosphorus-doped silicon, simultaneously creating ten billion spin pairs with high fidelity. This fulfils one of the essential requirements for a silicon-based quantum information processor.

Date: 2011
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DOI: 10.1038/nature09696

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