An Improved Claw Finding Algorithm Using Quantum Walk
An Improved Claw Finding Algorithm Using Quantum Walk
复制标题
使用量子行走改进的寻爪算法
DOI:
10.1007/978-3-540-74456-6_48
复制
发表时间:
2007
期刊:
影响因子:
2.3
通讯作者:
S. Tani
中科院分区:
文献类型:
--
作者:
S. Tani
The claw finding problem has been studied in terms of query complexity as one of the problems closely connected to cryptography. For given two functions, f and g, as an oracle which have domains of size N and M (N ≤ M), respectively, and the same range, the goal of the problem is to find x and y such that f(x) = g(y). This paper describes a quantum-walk-based algorithm that solves this problem; it improves the previous upper bounds. Our algorithm can be generalized to find a claw of k functions for any constant integer k > 1, where the domains of the functions may have different size.