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arXiv quant-ph/9604006quant-ph
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量子纠错码不必完全揭示错误综合征

Quantum Error-Correcting Codes Need Not Completely Reveal the Error Syndrome

Peter W. Shor, John A. Smolin

摘要:

目前提出的量子纠错码在通过量子信道发送的每个量子比特引入超过一比特熵的噪声存在下不起作用,也不能识别完整错误综合征的任何代码。我们描述了一个代码,它没有找到完整的错误伴随式,并可用于可靠的传输量子信息通过增加一个以上的比特的熵每个传输位的通道。在去极化通道的情况下,我们的代码可以用于保真度.8096的通道。现有的最好的代码只能运行到.8107。

英文摘要:

Quantum error-correcting codes so far proposed have not worked in the presence of noise which introduces more than one bit of entropy per qubit sent through a quantum channel, nor can any code which identifies the complete error syndrome. We describe a code which does not find the complete error syndrome and can be used for reliable transmission of quantum information through channels which add more than one bit of entropy per transmitted bit. In the case of the depolarizing channel our code can be used in a channel of fidelity .8096. The best existing code worked only down to .8107.

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