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arXiv 1801.08653quant-ph
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基于量子退火的高效组合优化算法

Efficient Combinatorial Optimization Using Quantum Annealing

Hristo N. Djidjev, Guillaume Chapuis, Georg Hahn, Guillaume Rizk

摘要:

最近第一台商用量子计算机的出现为解决NP难题提供了一个很有前途的工具,这些问题只能用现有技术来解决。然而,目前还不清楚量子计算的现状是否已经提供了超过经典计算中现有技术的量子优势。本文评估了D-Wave 2X量子退火机在两个NP困难图问题上的性能,特别是团查找和图划分。为此,我们提供了适用于量子退火机的Qubo和Ising Hamilton公式,并比较了各种量子求解器(由D-Wave Sys,Inc.提供的Sapi,QBSolv,QSage)。目前的经典算法(METIS,模拟退火,第三方团发现和图分裂算法)在某些测试集的图。我们证明,对于小图的情况下,经典的方法仍然优于量子退火计算时间方面,即使获得的最佳解决方案的质量是可比的。然而,由于可以嵌入在D-Wave 2X芯片上的问题大小有限,上述发现适用于量子退火机上可解决的大多数一般性质的问题。对于专为适应D-Wave 2X架构而设计的实例,我们观察到计算时间比经典方法大幅加快。

英文摘要:

The recent availability of the first commercial quantum computers has provided a promising tool to tackle NP hard problems which can only be solved heuristically with present techniques. However, it is unclear if the current state of quantum computing already provides a quantum advantage over the current state of the art in classical computing. This article assesses the performance of the D-Wave 2X quantum annealer on two NP hard graph problems, in particular clique finding and graph partitioning. For this, we provide formulations as Qubo and Ising Hamiltonians suitable for the quantum annealer and compare a variety of quantum solvers (Sapi, QBSolv, QSage provided by D-Wave Sys, Inc.) to current classical algorithms (METIS, Simulated Annealing, third-party clique finding and graph splitting heuristics) on certain test sets of graphs. We demonstrate that for small graph instances, classical methods still outperform the quantum annealer in terms of computing time, even though the quality of the best solutions obtained is comparable. Nevertheless, due to the limited problem size which can be embedded on the D-Wave 2X chip, the aforementioned finding applies to most of problems of general nature solvable on the quantum annealer. For instances specifically designed to fit the D-Wave 2X architecture, we observe substantial speed-ups in computing time over classical approaches.

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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