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arXiv quant-ph/0507190quant-ph
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一个广义隐移位问题的量子算法

Quantum algorithm for a generalized hidden shift problem

Andrew M. Childs, Wim van Dam

摘要:

考虑以下广义隐移位问题:给定{0,. M-1} x Z_N满足f(b,x)=f(b+1,x+s),其中b= 0,1,.,M-2,求Z_N中的未知位移s。对于M=N,这个问题是阿贝尔隐子群问题的一个实例,它可以在量子计算机上有效地解决,而对于M=2,它等价于二面角隐子群问题,没有有效的算法。对于任何固定的正整数,我们给出一个有效的(即,poly(log N))量子算法给出了M > N^n。该算法是基于“相当好的测量”,并使用H。Lenstra的(经典的)整数规划算法作为子程序。

英文摘要:

Consider the following generalized hidden shift problem: given a function f on {0,...,M-1} x Z_N satisfying f(b,x)=f(b+1,x+s) for b=0,1,...,M-2, find the unknown shift s in Z_N. For M=N, this problem is an instance of the abelian hidden subgroup problem, which can be solved efficiently on a quantum computer, whereas for M=2, it is equivalent to the dihedral hidden subgroup problem, for which no efficient algorithm is known. For any fixed positive epsilon, we give an efficient (i.e., poly(log N)) quantum algorithm for this problem provided M > N^epsilon. The algorithm is based on the "pretty good measurement" and uses H. Lenstra's (classical) algorithm for integer programming as a subroutine.

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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