Sparse-Hamiltonian approach to the time-evolution of molecules on quantum computers

Sparse-Hamiltonian approach to the time-evolution of molecules on quantum computers
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量子计算机上分子时间演化的稀疏哈密顿方法

DOI:
10.1140/epjs/s11734-021-00098-w
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发表时间:
2021
期刊:
The European Physical Journal Special Topics
影响因子:
--
通讯作者:
Freericks, James K.
Freericks, James K.
中科院分区:
--
文献类型:
--
作者:
Daniel, Christina;Dhawan, Diksha;Zgid, Dominika;Freericks, James K.

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相似文献

量子化学被认为是量子计算的潜在早期应用之一。电子结构的计算有两种方法:(1)变分量子本征解算法和(2)相位估计法。在这两种情况下,问题的复杂性增加了基组,其中哈密顿量不是稀疏的,或者是稀疏的,但需要许多轨道来准确描述感兴趣的分子。在这项工作中,我们探索的可能性映射到一个稀疏的Hubbard类哈密顿的分子问题,这使得绿色的功能为基础的方法,通过混合量子经典算法的电子结构。我们用一个简单的四位氢环来说明这种方法的时间演化方面。
Quantum chemistry has been viewed as one of the potential early applications of quantum computing. Two techniques have been proposed for electronic structure calculations: (1) the variational quantum eigensolver and (2) the phase-estimation algorithm. In both cases, the complexity of the problem increases for basis sets where either the Hamiltonian is not sparse, or it is sparse, but many orbitals are required to accurately describe the molecule of interest. In this work, we explore the possibility of mapping the molecular problem onto a sparse Hubbard-like Hamiltonian, which allows a Green’s-function-based approach to electronic structure via a hybrid quantum-classical algorithm. We illustrate the time-evolution aspect of this methodology with a simple four-site hydrogen ring.
DOI: 10.1142/s0217984920400497
发表时间: 2020
影响因子: 1.9
作者:
Xu, Luogen;Lee, J. T.;Freericks, J. K.
通讯作者: Freericks, J. K.
用于定量格林函数嵌入方法的局部哈密顿量。
DOI: 10.1063/1.4901432
发表时间: 2014
期刊: The Journal of chemical physics
影响因子: --
作者:
A. Rusakov;J. Phillips;D. Zgid
通讯作者: D. Zgid