评估低深度量子电路和高精度化学系统的地面状态能量
Shuo Sun1, Chandan Kumar2, Kevin Shen2,3
1School of Computation, Information and Technology, Technical University of Munich, Boltzmannstraße 3, Garching 85748, Germany.
The journal of physical chemistry. A
|March 3, 2025
概括
我们开发了一个用于化学的增强量子算法,减少了参数,以便在当前的量子计算机上进行更准确的计算. 这种方法改善了复杂分子模拟的变量量子Eigensolver (VQE).
科学领域:
- 量子计算是一种量子计算.
- 计算化学计算化学
- 量子算法 量子算法 量子算法
背景情况:
- 近期的量子计算机面临着噪声和浅电路的限制,阻碍了复杂的电子结构问题解决.
- 准确的量子化学计算对于理解分子行为和设计新材料至关重要.
研究的目的:
- 根据Qubit Coupled Cluster (QCC) 方法提出一个增强的变量量子Eigensolver (VQE) 替代方法.
- 为了减少量子化学模拟中需要优化的参数数量.
主要方法:
- 开发了一个增强的Qubit合集群 (QCC) 替代品,只需要*n*参数 (保利字符串生成器) 的优化.
- 评估了O3和Li4的基态能量和分子解离曲线,使用不同的活性空间.
- 将增强的QCC替代品与单双联结集群单双 (UCCSD) 和经典联结集群单双 (CCSD) 方法进行了比较.
主要成果:
- 与UCCSD相比,增强的QCC替代器显著减少了参数数量,同时保持了高精度.
- 在超导和被困离子量子计算机上的数值模拟和实验证明了该方法的有效性和实用性.
- 该方法可以在近期量子设备上对强烈相关的系统进行精确的量子化学计算.
结论:
- 增强的QCC替代品在当前量子硬件上为量子化学提供了更有效,更准确的方法.
- 通过减少参数优化和消除对称性恢复门,这种方法推进了量子计算在化学中的应用.
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