使用可极化嵌入的冰 VIII 和 IX 的电场梯度计算:古典计算机和量子模拟器的比较研究
Dániel Nagy1, Peter Reinholdt2, Phillip W K Jensen1
1Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark.
The journal of physical chemistry. A
|July 18, 2024
概括
我们评估了一种量子计算模型,可极化嵌入变量量子自身溶解器自一致场 (PE-VQE-SCF),用于计算电场梯度. 量子模型与冰 VIII 和冰 IX 的经典计算和实验数据有很好的一致性.
科学领域:
- 量子计算是一种量子计算.
- 计算化学是一种计算化学.
- 固态物理 固态物理
背景情况:
- 精确计算电场梯度对于理解分子性质至关重要.
- 量子计算为复杂的化学计算提供了一种新的方法.
- 像CASSCF这样的先前方法在准确性和计算成本方面存在局限性.
研究的目的:
- 评估可偏振嵌入变量量子自溶解器自一致场 (PE-VQE-SCF) 模型的性能.
- 为了将PE-VQE-SCF的结果与传统的完全活性空间自相一致场 (CASSCF) 计算和实验数据进行比较.
- 调查环境包容性对计算精度的影响.
主要方法:
- 使用了PE-VQE-SCF模型,基于适应性衍生组装问题量身定制 (ADAPT) 替代方案.
- 计算了冰 VIII 和冰 IX 的四极合常量.
- 量子计算结果与经典PE-CASSCF和实验测量结果进行了比较.
主要成果:
- PE-VQE-SCF的结果与经典的PE-CASSCF计算和实验发现密切一致.
- 环境的纳入对于匹配实验数据至关重要.
- 冰VIII的计算在CASSCF和VQE-SCF的实验不确定性范围内.
- VQE-SCF模型表明,环境包容性使波函数和优化变得复杂,可能会增加电路深度.
结论:
- 该PE-VQE-SCF模型在电场梯度计算方面表现出高精度.
- 环境影响对于在量子化学模拟中实现实验协议至关重要.
- 量子计算对推进计算化学具有前景,尽管电路复杂性需要考虑.
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