Ab initio扩展了哈伯德短聚烯模型,用于高效的量子计算
Yuichiro Yoshida1, Nayuta Takemori1,2, Wataru Mizukami1,3
1Center for Quantum Information and Quantum Biology, Osaka University, 1-2 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
The Journal of chemical physics
|August 28, 2024
概括
我们开发了一种用于分子电子结构计算的新量子计算方法. 这种方法简化了复杂的哈密尔顿式,提高了量子化学的效率和可扩展性.
科学领域:
- 量子计算是一种量子计算.
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 准确的分子电子结构计算对于理解化学系统至关重要.
- 目前的量子计算方法由于复杂的哈密尔顿数而面临着可扩展性的挑战.
- Ab initio向下折叠是一种通常用于周期性材料的方法.
研究的目的:
- 适应初始下折方法,以实现分子电子结构的高效量子计算.
- 为了减少量子模拟的第一原则哈密尔顿的计算复杂性.
- 为了实现更可扩展的量子化学计算.
主要方法:
- 引入了一个通过ab initio向下折叠获得的扩展的哈密尔顿式.
- 通过消除高能电子自由度来粗化哈密尔顿的第一原则.
- 采用受约束的随机相近似方法进行集成的动态电子相关性.
- 将模型哈密尔顿式映射到费米子到量子比特表示.
主要成果:
- 将电子排斥积分项的数量从O(N4) 减少到O(N2).
- 验证了垂直激发能量的方法以及乙烯,丁烯和六烯的特征.
- 捕获的趋势与实验和高级量子化学计算一致.
- 对于映射的哈密尔顿人来说,表现出明显较低的L1规范,表明可扩展性得到改善.
结论:
- 最初扩展的哈密尔顿式显示了量子计算机上的量子化学计算的巨大潜力.
- 该方法为分子电子结构模拟提供了更好的可扩展性.
- 这种方法促进了复杂化学系统的高效量子计算.
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