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arXiv 0905.3838quant-ph
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信道自适应量子纠错的鲁棒性

Robustness of channel-adapted quantum error correction

Gábor Balló, Péter Gurin

摘要:

量子信道模拟了我们感兴趣的系统与其环境之间的相互作用。这样的模型可以捕捉交互的主要特征,但由于环境的复杂性,我们不能假设它是完全准确的。我们研究的鲁棒性量子纠错操作对完全出乎意料的,随后未确定类型的信道不确定性。我们发现,一个通道自适应的最佳纠错操作不仅给最好的可能的信道保真度,但它是更强大的对信道的改变比任何其他纠错操作。我们的结果是有效的泡利通道和稳定器代码,但根据一些数值结果,我们相信,在一般情况下,也可以得出非常相似的结论。

英文摘要:

A quantum channel models the interaction between the system we are interested in and its environment. Such a model can capture the main features of the interaction but because of the complexity of the environment we can not assume that it is fully accurate. We study the robustness of quantum error correction operations against completely unexpected and subsequently undetermined type of channel uncertainties. We find that a channel-adapted optimal error correction operation does not only give the best possible channel fidelity but it is more robust against channel alterations than any other error correction operation. Our results are valid for Pauli channels and stabilizer codes but based on some numerical results we believe that very similar conclusions can be drawn also in the general case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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