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Quantum computing in the solid state: the challenge of decoherence.
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Quantum computing in the solid state: the challenge of decoherence.

Author: AJ Fisher Affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK.
Edition/Format: Article Article : English
Publication:Philosophical transactions. Series A, Mathematical, physical, and engineering sciences, 2003 Jul 15; 361(1808): 1441-50
Database:From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Other Databases: ECOBritish Library Serials
Summary:
The current status of solid-state implementations of quantum computing is briefly described. There are numerous candidate proposals, but only comparatively recently have some of them begun to progress to the point of demonstrating coherent motion of the individual quantum bits (qubits), and the controlled coupling of more than one qubit remains a significant challenge. We also present a generalization of the  Read more...
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Document Type: Article
All Authors / Contributors: AJ Fisher Affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK.
ISSN:1364-503X
Language Note: English
Unique Identifier: 111676620
Awards:

Abstract:

The current status of solid-state implementations of quantum computing is briefly described. There are numerous candidate proposals, but only comparatively recently have some of them begun to progress to the point of demonstrating coherent motion of the individual quantum bits (qubits), and the controlled coupling of more than one qubit remains a significant challenge. We also present a generalization of the fluctuation-dissipation theorem that provides a relationship between the coherent evolution entangling two spatially separated qubits, and the associated irreducible decoherence. This relationship may be used to bound the maximum attainable figures of merit in proposed two-qubit gates.

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