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arXiv quant-ph/0304161quant-ph
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用于量子纠错的稀疏图码

Sparse Graph Codes for Quantum Error-Correction

David J. C. MacKay, Graeme Mitchison, Paul L. McFadden

摘要:

我们提出了适用于量子纠错的稀疏图码。基于稀疏图的量子纠错码由于三个原因而受到关注。首先,目前已知的经典信道的最好的代码是基于稀疏图。其次,稀疏图码使与量子纠错过程相关的量子相互作用的数量保持较小:每个量子比特的数量恒定,与块长度无关。第三,稀疏图码通常在块长度和速率方面提供很大的灵活性。我们相信我们提出的一些代码是以前发表的量子纠错码所无法超越的。

英文摘要:

We present sparse graph codes appropriate for use in quantum error-correction. Quantum error-correcting codes based on sparse graphs are of interest for three reasons. First, the best codes currently known for classical channels are based on sparse graphs. Second, sparse graph codes keep the number of quantum interactions associated with the quantum error correction process small: a constant number per quantum bit, independent of the blocklength. Third, sparse graph codes often offer great flexibility with respect to blocklength and rate. We believe some of the codes we present are unsurpassed by previously published quantum error-correcting codes.

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