NIST scientists have prepared a single qubit with an error rate, under 10-4, that is low enough to enable error correction.
Because decoherence destroys the quantum information that is needed for the quantum algorithm that is supposed to run on the computer, scientists need to implement error correction to be able to implement a quantum algorithm. Therefore, this is an important step towards a working quantum computer.
The experiment which is published in the linked article achieved the low error rate by manipulating one trapped atom with microwaves instead of laser beams.
Sunday 4 September 2011
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