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arXiv quant-ph/9512032quant-ph
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存在好的量子纠错码

Good Quantum Error-Correcting Codes Exist

A. R. Calderbank, Peter W. Shor

摘要:

量子纠错码被定义为k个量子比特(2态量子系统)到n个量子比特的量子态空间的子空间中的酉映射(编码),使得如果任何t个量子比特经历任意的退相干(不一定独立地),则所得到的n个量子比特可以用于忠实地重建k个编码量子比特的原始量子态。证明了量子纠错码的渐近速率k/n = 1 - 2 H(2 t/n),其中H(p)是二进制熵函数-plogp-(1-p)log(1-p).给出了这一渐近速率的上界。

英文摘要:

A quantum error-correcting code is defined to be a unitary mapping (encoding) of k qubits (2-state quantum systems) into a subspace of the quantum state space of n qubits such that if any t of the qubits undergo arbitrary decoherence, not necessarily independently, the resulting n qubits can be used to faithfully reconstruct the original quantum state of the k encoded qubits. Quantum error-correcting codes are shown to exist with asymptotic rate k/n = 1 - 2H(2t/n) where H(p) is the binary entropy function -p log p - (1-p) log (1-p). Upper bounds on this asymptotic rate are given.

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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