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Fetching marked items from an unsorted database in NMR ensemble computing
Xiao, L; Long, GL; Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
2002
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号66期号:5页码:-
摘要The speedup of an unsorted database search has always been a challenging problem not only in classical computation but also in quantum computation. We propose a fetching algorithm for a Liouville space nuclear magnetic resonance (NMR) ensemble computing to fetch a marked item from an unsorted database directly. This algorithm achieves the absolute optimum in an unsorted database search problem: a single query. In fact, this algorithm also works well for fetching several unknown numbers of marked items. The computer simulation realization of the algorithm in a three-qubit homonuclear spin system is also presented. In addition, a compromised version of the algorithm, which reduces the demand on the structure of the molecules for the NMR experiment, is also devised.
部门归属Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China; Key Lab Quantum Informat & Measurements, Beijing 100084, Peoples R China; Tsing Hua Univ, Ctr Atom & Mol NanoSci, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Spin Liouville Space Quantum Computation Algorithm
学科领域Physics
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收录类别SCI
WOS记录号WOS:000179631900043
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13405
专题理论物理所SCI论文
通讯作者Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
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GB/T 7714
Xiao, L,Long, GL,Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.. Fetching marked items from an unsorted database in NMR ensemble computing[J]. PHYSICAL REVIEW A,2002,66(5):-.
APA Xiao, L,Long, GL,&Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China..(2002).Fetching marked items from an unsorted database in NMR ensemble computing.PHYSICAL REVIEW A,66(5),-.
MLA Xiao, L,et al."Fetching marked items from an unsorted database in NMR ensemble computing".PHYSICAL REVIEW A 66.5(2002):-.
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