Robustness to spontaneous emission of a variational quantum algorithm
Robustness to spontaneous emission of a variational quantum algorithm
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DOI：
10.1103/physreva.101.012335
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发表时间：
2020-01-21
影响因子：
2.9
通讯作者：
Henriet, Loic
中科院分区：
文献类型：
--
作者：
Henriet, Loic
我们从理论上研究了耗散对变分量子算法性能的影响，该算法用于近似求解中性原子平台上的组合优化问题，即最大独立集。我们采取一个现实的模型耗散与自发辐射，并数值表明，这些不相干的过程的不利影响自发衰减的变分性质的程序。此外，我们还实现了一个替代的优化方案最近提出的，其中一个使用的平均能量作为目标函数的预期不足。
We study theoretically the effects of dissipation on the performances of a variational quantum algorithm used to approximately solve a combinatorial optimization problem, the maximum independent set, on a platform of neutral atoms. We take a realistic model of dissipation with spontaneous emission, and show numerically that the detrimental effects of these incoherent processes are spontaneously attenuated by the variational nature of the procedure. We furthermore implement an alternative optimization scheme recently proposed, where one uses the expected shortfall of the mean energy as the objective function.