Overhead and noise threshold of fault-tolerant quantum error correction

Overhead and noise threshold of fault-tolerant quantum error correction

Quantum error correction (QEC) may allow a precision ≪10-6 per logical operation to be attained in quantum computers. In order for this to be possible, QEC must be applied in a fault tolerant manner, where the QEC process is constructed so that it removes more noise than it generates when it is itse...

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Detalhes bibliográficos
Autor principal: Steane, A
Formato: Journal article
Idioma:English
Publicado em: 2003
Descrição
Resumo:Quantum error correction (QEC) may allow a precision ≪10-6 per logical operation to be attained in quantum computers. In order for this to be possible, QEC must be applied in a fault tolerant manner, where the QEC process is constructed so that it removes more noise than it generates when it is itself imperfect. This paper addresses the problem of estimating the amount of noise that can be tolerated, and quantifying the cost of the stability in terms of the required increase in the number of physical qubits in the computer.

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