Quantum search for multiple items using parallel queries
Quantum search for multiple items using parallel queries
复制标题
使用并行查询对多个项目进行量子搜索
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
J. Radhakrishnan
中科院分区:
文献类型:
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作者:
Lov K. Grover;J. Radhakrishnan
In the quantum database search problem we are required to search for an item in a database. In this paper, we consider a generalization of this problem, where we are provided d identical copes of a database each with N items which we can query in parallel. Then, given k items, we are required to determine the locations where these items are stored. We show that any quantum algorithm for this task must perform Omega(sqrt{Nk/d min{d,k}}) parallel queries. We also design an algorithm whose performance comes within a factor O(log d) of this lower bound.