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Science 29 August 1997:
Vol. 277. no. 5330, pp. 1258 - 1259
DOI: 10.1126/science.277.5330.1258
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Perspectives

SEMICONDUCTOR DEVICES:
Closer to Coherence Control

Lu J. Sham

As electronic devices get smaller, quantum effects begin to appear. These effects may one day be useful in quantum computational devices, but to take full advantage of them quantum coherence must be maintained for long times at practical temperatures. In his Perspective, Sham discusses results presented in the same issue by Kikkawa et al. that reveal long-duration spin memory at room temperature in a semiconductor material. The findings open the way to further study of spin coherence in condensed matter systems.

The author is in the Department of Physics, University of California at San Diego, La Jolla, CA 92093-0319, USA. E-mail: lsham{at}ucsd.edu

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