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arXiv 1502.02098quant-phcs.DM
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量子退火器在有限范围约束满足问题上的性能

Performance of a quantum annealer on range-limited constraint satisfaction problems

Andrew D. King, Trevor Lanting, Richard Harris

摘要:

最近的D-Wave维苏威火山量子退火的性能进行了比较,一套经典的算法对一类约束满足的情况下,基于挫折循环。然而,这些实例的构造导致最大耦合强度随着问题大小而增加。因此,较大的实例受到放大的模拟控制误差的影响,并且在硬件和软件中在较高温度下有效地退火。我们生成类似的约束满足的情况下,有限范围内的耦合强度和经典算法进行类似的比较。在这些情况下,D-Wave Vesuvius处理器以固定的20 $μ$ s退火时间运行,显示出比软件求解器更大的缩放优势。这种缩放优势为这些问题的量子加速提供了可能性。我们的研究结果支持的假设,D波维苏威处理器的性能受到模拟控制误差,这可以减少和减轻技术成熟的严重影响。

英文摘要:

The performance of a D-Wave Vesuvius quantum annealer was recently compared to a suite of classical algorithms on a class of constraint satisfaction instances based on frustrated loops. However, the construction of these instances leads the maximum coupling strength to increase with problem size. As a result, larger instances are subject to amplified analog control error, and are effectively annealed at higher temperatures in both hardware and software. We generate similar constraint satisfaction instances with limited range of coupling strength and perform a similar comparison to classical algorithms. On these instances the D-Wave Vesuvius processor, run with a fixed 20$μ$s anneal time, shows a scaling advantage over the software solvers for the hardest regime studied. This scaling advantage opens the possibility of quantum speedup on these problems. Our results support the hypothesis that performance of D-Wave Vesuvius processors is heavily influenced by analog control error, which can be reduced and mitigated as the technology matures.

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