Decoherence and Efficiency of Quantum Error Correction

Details Decoherence and Efficiency of Quantum Error Correction Decoherence and Efficiency of Quantum Error Correction

1996-08-08

arxiv.org/abs/quant-ph/9608010v2

Physics

Quantum Physics

13 pages, no figures, REVTeX style, resubmission to Phys.Rev.A, important changes

Scientific paper

Certain physical aspects of quantum error correction are discussed for a quantum computer (n-qubit register) in contact with a decohering environment. Under rather plausible assumptions upon the form of the computer-environment interaction, the efficiency of a general correcting procedure is evaluated as a function of the spontaneous-decay duration and the rank of errors covered by the procedure. It is proved that the probability of errors can be made arbitrarily small by enhancing the correction method, provided the decohering interaction is represented by a bounded operator.

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