论文标题
使用并行性加速变异量子本质量
Accelerating the variational quantum eigensolver using parallelism
论文作者
论文摘要
量子计算机越来越大，但是设备保真度可能无法跟上量子数的增加。使用有限的大型门深度的大型设备的一种方法是同时运行许多小电路。在本文中，我们详细介绍了在Rigetti Aspen-M-1设备上并联运行电路的研究。我们并行运行两分流的电路，以使用变分量子本质量求解Hubbard模型的简单实例。我们提出了并行运行多达33个电路的结果（66个Quarbits），这表明，使用误差缓解技术，可以利用并从当前量子硬件上并行获得实时加速。用于探索VQE Energy Landscape的$ 18 \ times $ $ 18 \ times $，用于运行VQE优化的$ 8 \ times $。
Quantum computers are getting larger and larger, but device fidelities may not be able to keep up with the increase in qubit numbers. One way to make use of a large device that has a limited gate depth is to run many small circuits simultaneously. In this paper we detail our investigations into running circuits in parallel on the Rigetti Aspen-M-1 device. We run two-qubit circuits in parallel to solve a simple instance of the Hubbard model using the variational quantum eigensolver. We present results for running up to 33 circuits in parallel (66 qubits), showing that with the use of error mitigation techniques it is possible to make use of, and gain a real-time speedup from, parallelisation on current quantum hardware. We obtain a speedup by $18\times$ for exploring the VQE energy landscape, and by more than $8\times$ for running VQE optimisation.
