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arXiv 2305.04425quant-phphysics.chem-ph
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用于变分量子本征求解器的模块化簇电路

Modular Cluster Circuits for the Variational Quantum Eigensolver

Seyed Ehsan Ghasempouri, Gerhard W. Dueck, Stijn De Baerdemacker

AI总结:

本研究针对NISQ设备上VQE算法的噪声累积问题,提出模块化2量子比特簇电路,可在保证化学精度的同时降低电路深度,且具备价键化学可解释性,已在多个分子和横场伊辛模型上验证有效。

摘要:

变分量子本征求解器(VQE)算法近年来已成为在含噪声中等规模量子(NISQ)设备上计算分子量子化学性质的常用方法。为避免NISQ设备在电路中产生的噪声累积,将电路的所谓量子深度(定义为需顺序执行的量子门的最小数量)维持在最低水平至关重要。本研究提出了一种模块化2量子比特簇电路,与此前提出的架构相比,该电路可设计出深度更浅的量子电路,且不会损失化学精度。此外,得益于该簇电路的简洁性,可对其赋予价键化学层面的解释。研究在H₂、(H₂)₂和LiH分子以及有限尺寸横场伊辛模型(transverse-field Ising model)上对该设计进行了测试,其中后者可从共振价键图像的角度为电路的构建提供更多见解。

英文摘要:

The variational quantum eigensolver (VQE) algorithm recently became a popular method to compute quantum chemical properties of molecules on noisy intermediate scale quantum (NISQ) devices. In order to avoid noise accumulation from the NISQ device in the circuit, it is important to keep the so-called quantum depth of the circuit at a minimum, defined as the minimum number of quantum gates that need to be operated sequentially. In the present work, we introduce a modular 2-qubit cluster circuit that allows for the design of a shallow-depth quantum circuit compared to previously proposed architectures without loss of chemical accuracy. Moreover, by virtue of the simplicity of the cluster circuit, it is possible to assign a valence bond chemical interpretation to the cluster circuit. The design was tested on the H2, (H2)2 and LiH molecules, as well as the finite-size transverse-field Ising model, as the latter provides additional insights in the construction of the circuit in a resonating valence bond picture.

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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