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arXiv 2108.01622quant-ph
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高斯玻色子采样中量子优势的边界

The Boundary for Quantum Advantage in Gaussian Boson Sampling

Jacob F. F. Bulmer, Bryn A. Bell, Rachel S. Chadwick, Alex E. Jones, Diana Moise, Alessandro Rigazzi, Jan Thorbecke, Utz-Uwe Haus, Thomas Van Vaerenbergh, Raj B… 展开作者

Jacob F. F. Bulmer, Bryn A. Bell, Rachel S. Chadwick, Alex E. Jones, Diana Moise, Alessandro Rigazzi, Jan Thorbecke, Utz-Uwe Haus, Thomas Van Vaerenbergh, Raj B. Patel, Ian A. Walmsley, Anthony Laing

摘要:

确定量子机器相对于经典机器提供计算优势的边界是绘制其有用性的关键一步。高斯玻色子采样(GBS)是从高纠缠高斯态中测量光子的一种方法,是追求量子优势的主要方法。最先进的量子光子学实验,一旦编程,在几分钟内运行,将需要6亿年才能使用最好的现有经典算法进行模拟。在这里,我们提出了更快的经典GBS模拟方法,包括速度和精度的改进,以计算循环矩阵,在GBS的心脏矩阵函数。我们在$\sim \! 100,000$核心超级计算机上测试这些,以模拟一系列不同的GBS实验,最多可达100种模式和92个光子。这将经典模拟最先进的GBS实验的运行时间减少到几个月-比以前的估计提高了9个数量级。最后,我们介绍了一个分布,是有效的样本从经典的,并通过各种GBS验证方法,为未来的实验测试提供了一个重要的对手。

英文摘要:

Identifying the boundary beyond which quantum machines provide a computational advantage over their classical counterparts is a crucial step in charting their usefulness. Gaussian Boson Sampling (GBS), in which photons are measured from a highly entangled Gaussian state, is a leading approach in pursuing quantum advantage. State-of-the-art quantum photonics experiments that, once programmed, run in minutes, would require 600 million years to simulate using the best pre-existing classical algorithms. Here, we present substantially faster classical GBS simulation methods, including speed and accuracy improvements to the calculation of loop hafnians, the matrix function at the heart of GBS. We test these on a $\sim \! 100,000$ core supercomputer to emulate a range of different GBS experiments with up to 100 modes and up to 92 photons. This reduces the run-time of classically simulating state-of-the-art GBS experiments to several months -- a nine orders of magnitude improvement over previous estimates. Finally, we introduce a distribution that is efficient to sample from classically and that passes a variety of GBS validation methods, providing an important adversary for future experiments to test against.

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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