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Oddly, Too Much Weirdness Slows a Quantum Computer Down

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Science  27 Mar 2009:
Vol. 323, Issue 5922, pp. 1658-1659
DOI: 10.1126/science.323.5922.1658b

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Summary

Too much of the mysterious quantum connection called entanglement is bad for a quantum computer and makes it run only marginally faster than a conventional one, a new analysis shows.