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Science 20 October 2006:
Vol. 314. no. 5798, p. 381
DOI: 10.1126/science.314.5798.381b
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This Week in Science

Quantum error-correction codes were introduced just over a decade ago to tackle the problem of decoherence, which at the time was thought to be an insurmountable obstacle to the development of quantum information processing. The present quantum error-correction codes are effective but somewhat limited in application and tend to be slow. Brun et al. (p. 436, published online 28 September; see the Perspective by Gottesman) present a theory of entanglement-assisted quantum error correction, a technique that generalizes and simplifies the existing theory of stabilizer codes and opens the possibility of whole new classes of highly efficient codes to protect quantum information from decoherence. The existing classes of quantum error-correcting codes can now be seen to be special cases of a much larger class, the entanglement-assisted error-correcting codes.




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