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Science 25 May 2007:
Vol. 316. no. 5828, pp. 1130 - 1131
DOI: 10.1126/science.1143429
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Perspectives

APPLIED PHYSICS:
One Electron Makes Current Flow

Stephen Giblin

A single electron pumped in and out of a quantum dot could be useful as a calibration standard for electronics or as the basic unit of a quantum computer.

The author is in the Quantum Detection Group, National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK. E-mail: stephen.giblin{at}npl.co.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)