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arXiv 1208.0262quant-ph
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利用局域绝热演化和谱方法在结构化数据库中进行量子搜索

Quantum search in structured database using local adiabatic evolution and spectral methods

R. Sufiani, N. Bahari

摘要:

自从Grover的开创性工作提供了一种加速组合搜索的方法以来,量子搜索已经得到了非常详细的研究。我们提出了一种新的方法来设计量子搜索算法,找到一个标记的元素在状态空间的图。该算法是基于一个本地的非绝热演化的哈密顿与图形。主要的创新点是采用了Krylov空间投影方法、Lanczos算法和谱分布方法。事实上,使用这些技术与二阶微扰理论,我们给出了一个系统的方法来计算近似的搜索时间,在该时间可以达到显着的状态。也就是说,对于任何被认为是数据库的状态空间的无向正则连通图,所介绍的算法提供了一个系统的和可编程的方式来评估的搜索时间,在相应的图多项式。

英文摘要:

Since Grover's seminal work which provides a way to speed up combinatorial search, quantum search has been studied in great detail. We propose a new method for designing quantum search algorithms for finding a marked element in the state space of a graph. The algorithm is based on a local diabatic evolution of the Hamiltonian associated with the graph. The main new idea is to apply some techniques such as Krylov bspace projection methods, Lanczos algorithm and spectral distribution methods. Indeed, using these techniques together with the second-order perturbation theory, we give a systematic method for calculating the approximate search time at which the marked state can be reached. That is, for any undirected regular connected graph which is considered as the state space of the database, the introduced algorithm provides a systematic and programmable way for evaluation of the search time, in terms of the corresponding graph polynomials.

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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