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arXiv 2404.11490quant-ph
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求解高维量子系统的变分方法

Variational methods for solving high dimensional quantum systems

Daming Li

AI总结:

该研究探究DMRG、玻尔兹曼机学习、VQE三种变分方法,经Jordan-Wigner变换映射模型后,用于求解凝聚态与高能物理两类量子系统的基态,验证变分方法处理复杂量子系统的有效性。

摘要:

变分方法是求解高维量子系统的极具价值的计算工具。本文探究了三种变分方法的有效性:密度矩阵重整化群(DMRG)、玻尔兹曼机学习以及变分量子本征求解器(VQE)。我们将这些方法应用于两种不同的量子系统:凝聚态物理中的fermi-Hubbard模型,以及高能物理中的Schwinger模型。为了便于在量子计算机上开展计算,我们利用Jordan-Wigner变换将每个模型映射到自旋1/2系统,该变换使我们能够发挥量子计算的能力。我们计算了这两种量子系统的基态,并对比了三种变分方法所得的结果。借此,我们旨在证明这些变分方法在处理复杂量子系统方面的能力与有效性。

英文摘要:

Variational methods are highly valuable computational tools for solving high-dimensional quantum systems. In this paper, we explore the effectiveness of three variational methods: the density matrix renormalization group (DMRG), Boltzmann machine learning, and the variational quantum eigensolver (VQE). We apply these methods to two different quantum systems: the fermi-Hubbard model in condensed matter physics and the Schwinger model in high energy physics. To facilitate the computations on quantum computers, we map each model to a spin 1/2 system using the Jordan-Wigner transformation. This transformation allows us to take advantage of the capabilities of quantum computing. We calculate the ground state of both quantum systems and compare the results obtained using the three variational methods. By doing so, we aim to demonstrate the power and effectiveness of these variational approaches in tackling complex quantum systems.

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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