Dealing with Decoherence

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Science  05 Jun 2009:
Vol. 324, Issue 5932, pp. 1277-1278
DOI: 10.1126/science.1169554

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The dream of building computers that work according to the rules of quantum mechanics has strongly driven research over the past decade in many fields of basic and applied sciences, including physics, chemistry, and computer science. About 10 years ago, it was shown mathematically that the direct use of quantum phenomena such as interference and entanglement could crucially speed up data searching and prime factorization for encryption. To turn quantum computers into reality, however, many issues in engineering and in basic physics need to be addressed.