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arXiv quant-ph/0304138quant-ph
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噪声Oracle对搜索算法复杂度的影响

Effects of Noisy Oracle on Search Algorithm Complexity

Neil Shenvi, Kenneth R. Brown, K. Birgitta Whaley

摘要:

Grover的算法为非结构化数据库或库搜索提供了超过经典算法的二次加速。本文探讨了Grover的搜索算法的鲁棒性的随机相位误差的预言,并分析了搜索过程的复杂性作为一个功能的缩放的预言错误与数据库或库的大小。离散和连续时间的搜索算法的实现进行了研究。它表明,除非预言相位误差缩放为O(N^(-1/4)),无论是离散的,也不是连续时间的实现格罗弗的算法是可缩放的错误,在没有纠错。

英文摘要:

Grover's algorithm provides a quadratic speed-up over classical algorithms for unstructured database or library searches. This paper examines the robustness of Grover's search algorithm to a random phase error in the oracle and analyzes the complexity of the search process as a function of the scaling of the oracle error with database or library size. Both the discrete- and continuous-time implementations of the search algorithm are investigated. It is shown that unless the oracle phase error scales as O(N^(-1/4)), neither the discrete- nor the continuous-time implementation of Grover's algorithm is scalably robust to this error in the absence of error correction.

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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