arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.12458quant-ph
收藏

实用量子计算:用量子方法求解波动方程

Practical Quantum Computing: solving the wave equation using a quantum approach

Adrien Suau, Gabriel Staffelbach, Henri Calandra

摘要:

在过去的几年里,已经设计出了几种试图解决偏微分方程求解问题的量子算法。一方面,“直接”量子算法旨在通过执行一个大的量子线路来编码PDE的解。另一方面,变分算法通过执行几个小的量子线路来近似PDE的解,并利用经典优化器。在这项工作中,我们提出了一个实验研究的成本(在一个理想化的硬件从现实的门数据创建的门数和执行时间)与“直接”量子算法之一:波动方程求解器设计的[PCS。Costa,S. Jordan,A. Ostrander,Phys. Rev. A 99,012323,2019]。我们表明,我们的量子波动方程求解器的实现与理论上的大O算法的复杂性。我们还详细解释了实施步骤,并讨论了一些改进的可能性。最后,我们的实现在实验上证明了一些PDE可以在量子计算机上求解,即使选择的直接量子算法需要纠错的量子芯片,这在短期内是不可用的。

英文摘要:

In the last years, several quantum algorithms that try to address the problem of partial differential equation solving have been devised. On one side, "direct" quantum algorithms that aim at encoding the solution of the PDE by executing one large quantum circuit. On the other side, variational algorithms that approximate the solution of the PDE by executing several small quantum circuits and making profit of classical optimisers. In this work we propose an experimental study of the costs (in terms of gate number and execution time on a idealised hardware created from realistic gate data) associated with one of the "direct" quantum algorithm: the wave equation solver devised in [PCS. Costa, S. Jordan, A. Ostrander, Phys. Rev. A 99, 012323, 2019]. We show that our implementation of the quantum wave equation solver agrees with the theoretical big-O complexity of the algorithm. We also explain in great details the implementation steps and discuss some possibilities of improvements. Finally, our implementation proves experimentally that some PDE can be solved on a quantum computer, even if the direct quantum algorithm chosen will require error-corrected quantum chips, which are not believed to be available in the short-term.

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。

↑