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arXiv 2006.03068quant-ph
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使用错误权重奇偶校验的容错量子纠错

Fault-tolerant quantum error correction using error weight parities

Theerapat Tansuwannont, Debbie Leung

摘要:

在使用不完美基元的量子纠错中,由少数故障引起的高权重的错误是主要关注点,因为它们可能无法由量子纠错码校正。幸运的是,不同权重的一些误差在逻辑上是等价的,并且相同的校正过程适用于所有等价的误差,因此校正高权重的误差有时是可能的。在这项工作中,我们介绍了一种技术,称为重量奇偶纠错(WPEC),它可以纠正泡利错误的任何重量在一些稳定器码提供的错误的重量的奇偶性是已知的。我们证明了该技术适用于由[[7,1,3]] Steane码或[[23,1,7]] Golay码构造的级联码。我们还提供了一个容错纠错协议,使用WPEC的[[49,1,9]]级联Steane码,可以纠正多达3个错误,只需要2个ancillas。

英文摘要:

In quantum error correction using imperfect primitives, errors of high weight arising from a few faults are major concerns since they might not be correctable by the quantum error correcting code. Fortunately, some errors of different weights are logically equivalent and the same correction procedure is applicable to all equivalent errors, thus correcting high-weight errors is sometimes possible. In this work, we introduce a technique called weight parity error correction (WPEC) which can correct Pauli error of any weight in some stabilizer codes provided that the parity of the weight of the error is known. We show that the technique is applicable to concatenated codes constructed from the [[7,1,3]] Steane code or the [[23,1,7]] Golay code. We also provide a fault-tolerant error correction protocol using WPEC for the [[49,1,9]] concatenated Steane code which can correct up to 3 faults and requires only 2 ancillas.

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