使用ADAPT变量量子自溶解器和双单元下折的量子化学
Harjeet Singh1,2, Luke W Bertels3, Daniel Claudino3
1Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States.
Journal of chemical theory and computation
|September 4, 2025
概括
这项研究将双单元合集群 (DUCC) 理论与自适应变量量子自溶器 (ADAPT-VQE) 结合起来,以改进量子化学模拟. 在不增加量子计算需求的情况下提高精度.
科学领域:
- 量子化学
- 计算物理
- 量子计算
背景情况:
- 精确的量子模拟对于理解化学系统至关重要.
- 开发高效的量子算法是推进计算化学的关键.
- 单元式下折方法旨在减少量子多体问题的复杂性.
研究的目的:
- 评估用于量子模拟的双单元合集群 (DUCC) 有效哈密尔顿的准确性.
- 调查 DUCC 汉密尔顿人的能力, 捕获活跃空间之外的动态相关能量.
- 在与自适应变量量子自溶器 (ADAPT-VQE) 结合时评估 DUCC 哈密尔顿的性能.
主要方法:
- 将双单元合集群 (DUCC) 理论与自适应变量量子自溶器 (ADAPT-VQE) 结合起来.
- 与已知用于回收动态关联能量的方法对比DUCC有效的哈密尔顿数.
- 分析强相关性,交换器截断,高体项和近似幅度对哈密尔顿准确性的影响.
主要成果:
- DUCC有效的哈密尔顿式显示出在活跃空间之外恢复动态相关能量的希望.
- DUCC 和 ADAPT-VQE 的组合显示了与标准活性空间哈密尔顿的可比性.
- 在量子处理器所需的计算资源相应增加的情况下,观察到精度的提高.
结论:
- DUCC有效的哈密尔顿式提供了更准确的化学量子模拟的途径.
- 将DUCC与ADAPT-VQE集成为电子结构计算提供了一种强大的混合量子古典方法.
- 这项工作突出了单元下折技术的潜力,以提高量子计算化学的效率和准确性.
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