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题名: Grover algorithm with zero theoretical failure rate
作者: Long, GL
刊名: PHYSICAL REVIEW A
出版日期: 2001
卷号: 64, 期号:2, 页码:-
关键词: QUANTUM
学科分类: Physics
通讯作者: Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
部门归属: Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China; Minist Educ, Key Lab Quantum Informat & Measurements, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Tsing Hua Univ, Ctr Atom Mol & Nanosci, Beijing 100084, Peoples R China
英文摘要: In a standard Grover's algorithm for quantum searching, the probability of finding the marked item is not exactly 1. In this paper we present a modified version of Grover's algorithm that searches a marked state with full successful rate. The modification is done by replacing the phase inversion by phase rotation through angle phi. The rotation angle is given analytically to be phi = 2 arcsin(sin [pi/(4J+6)]/sin beta), where sin beta = 1/rootN, N is the number of items in the database, and J is any integer equal to or greater than the integer part of [(pi /2)-beta]/(2 beta). Upon measurement at the (J+1)th iteration, the marked state is obtained with certainty.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000170297300023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13696
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Long, GL. Grover algorithm with zero theoretical failure rate[J]. PHYSICAL REVIEW A,2001,64(2):-.
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