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arXiv 2201.12221quant-ph
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用量子虚时间演化求解MaxCut

Solving MaxCut with Quantum Imaginary Time Evolution

Rizwanul Alam, George Siopsis, Rebekah Herrman, James Ostrowski, Phillip Lotshaw, Travis Humble

摘要:

我们介绍了一种基于量子虚时间演化(QITE)的方法来有效地解决最大割问题。我们采用了一个线性的Anterior酉更新和初始状态不涉及纠缠,以及一个时间依赖的哈密顿插值之间的给定的图和一个子图与两个边缘切除。我们将该方法应用于数千个随机选择的图形,最多有50个顶点。我们表明,我们的算法表现出93%以上的性能收敛到最大的解决方案的最大切割问题的所有考虑的图形。我们的研究结果与经典算法,如贪婪和Goemans-Williamson算法的性能相比毫不逊色。我们还讨论了QITE算法的最终态与基态的重叠作为性能度量,这是其他经典算法所不具有的量子特征。该度量可以通过引入高阶Ansaetze和纠缠初态来改进。

英文摘要:

We introduce a method to solve the MaxCut problem efficiently based on quantum imaginary time evolution (QITE). We employ a linear Ansatz for unitary updates and an initial state involving no entanglement, as well as an imaginary-time-dependent Hamiltonian interpolating between a given graph and a subgraph with two edges excised. We apply the method to thousands of randomly selected graphs with up to fifty vertices. We show that our algorithm exhibits a 93% and above performance converging to the maximum solution of the MaxCut problem for all considered graphs. Our results compare favorably with the performance of classical algorithms, such as the greedy and Goemans-Williamson algorithms. We also discuss the overlap of the final state of the QITE algorithm with the ground state as a performance metric, which is a quantum feature not shared by other classical algorithms. This metric can be improved by introducing higher-order Ansaetze and entangled initial states.

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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