论文标题

计算流体动力学的变分量子算法

Variational Quantum Algorithms for Computational Fluid Dynamics

论文作者

Jaksch, Dieter, Givi, Peyman, Daley, Andrew J., Rung, Thomas

论文摘要

量子计算使用非常小的系统的物理原理来开发计算平台,这些平台可以解决常规超级计算机上棘手的问题。不仅在构建所需的硬件方面存在挑战,而且在确定最有希望的应用领域和开发相应的量子算法方面存在挑战。中等规模的噪声量子计算机的可用性现在正在推动新算法的发展,并在包括Aeroscience在内的各种领域进行了应用。变异量子算法特别有前途,因为它们具有相对的噪声耐受性,并且旨在仅用几百量列表获得量子优势。此外,它们适用于整个自然科学和行业中出现的广泛优化问题。为了证明航空社区的可能性,我们对如何在计算流体动力学中如何利用变异量子算法给出了一个观点。我们讨论了如何将经典问题转化为量子算法及其对数规模的问题大小。作为一个明确的示例,我们将此方法应用于一个空间维度的汉堡方程。我们认为,如果量子硬件在当前设想的情况下进行,并且强调加入量子算法开发具有具有应用特定于应用程序的专业知识以实现现实世界影响的量子硬件,则可以在本十年末实现量子优势。

Quantum computing uses the physical principles of very small systems to develop computing platforms which can solve problems that are intractable on conventional supercomputers. There are challenges not only in building the required hardware, but also in identifying the most promising application areas and developing the corresponding quantum algorithms. The availability of intermediate-scale noisy quantum computers is now propelling the developments of novel algorithms, with applications across a variety of domains, including in aeroscience. Variational quantum algorithms are particularly promising since they are comparatively noise tolerant and aim to achieve a quantum advantage with only a few hundred qubits. Furthermore, they are applicable to a wide range of optimization problems arising throughout the natural sciences and industry. To demonstrate the possibilities for the aeroscience community, we give a perspective on how variational quantum algorithms can be utilized in computational fluid dynamics. We discuss how classical problems are translated into quantum algorithms and their logarithmic scaling with problem size. As an explicit example we apply this method to Burgers' Equation in one spatial dimension. We argue that a quantum advantage over classical computing methods could be achieved by the end of this decade if quantum hardware progresses as currently envisaged and emphasize the importance of joining up development of quantum algorithms with application-specific expertise to achieve real-world impact.

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