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Article

Title: Zeroing In

Author: Staff Article Type: Product Analysis
Source: The Economist, v382 n8522 p89(1) Publication Date: Mar 31, 2007
  ISSN: 0013-0613
  Illustrations: Photographs
URL of Publication: http://www.economist.com

Researchers led by Dr. Andrei Sokolov of the University of Nebraska and Bernard Doudin of the University of Strasbourg have demonstrated how an individual data bit (a one or a zero of the binary code used by computers) might be stored on one atom. The team has been able to enhance data storage for free flow in which spins of electrons can align themselves with those of data-storing atoms to give a clean signal. The researchers used standard lithographic techniques to make a narrow loop of cobalt wire that they put on a silicon chip. To create memory, they tapered the wire into an hourglass shape at a single point along the length. The waist of the hourglass measured about an atom or so across and performed as the narrow wire. As electrons passed through the waist, the signal from the atoms was detected. The researchers proved that a bit could be stored on an atom. If the science can be commercialized, it could challenge current forms of memory and could make quantum physics a blessing in disguise.

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