改进模块化和ipie的新功能:在零和有限温度下,在CPU和GPU上实现更大的AFQMC计算
Tong Jiang1, Moritz K A Baumgarten1, Pierre-François Loos2
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
The Journal of chemical physics
|October 25, 2024
概括
ipie包现在为辅助场量子蒙特卡罗 (AFQMC) 模拟提供了增强的模块化和GPU加速. 这使得大型量子系统的高精度计算成为可能,进步了计算化学研究.
科学领域:
- 计算量子化学 计算量子化学
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 最初发布的ipie为辅助场量子蒙特卡罗 (AFQMC) 计算提供了基础.
- 进一步开发对于处理更大,更复杂的量子系统和提高计算效率至关重要.
研究的目的:
- 详细介绍ipie的模块化和功能上的重大升级.
- 展示该软件包对大规模分布式和GPU加速模拟的增强功能.
- 引入新的AFQMC实现,以便在量子化学中更广泛地适用.
主要方法:
- 增强的模块化,允许试验和步行者类型的灵活整合.
- 在多个CPU和GPU中实现分布式哈密尔顿模拟.
- 支持使用CUDA和cupy进行NVIDIA GPU加速,用于多Slater决定性试验波函数.
- 开发自由投射,有限温度和电子-声波AFQMC方法.
- 集成用于财产计算的自动区分.
主要成果:
- 成功地对大型系统进行分布式哈密尔顿模拟,包括一个具有84个电子的二元体.
- 使用GPU加速,对多参考星团如[Cu2O2]2+和[Fe2S2(SCH3)4]2的近乎精确的基态能量进行高效和准确的计算.
- 已证明能够处理超过单个CPU/GPU内存限制的系统.
结论:
- ipie已经发展成为AFQMC研究的领先平台,为复杂的模拟提供先进的功能.
- 这些新能力有助于更雄心勃勃的计算方法开发和量子化学中的应用.
- 该软件包能够很好地应对高精度模拟大规模量子系统的挑战.
相关概念视频
01:29Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
42
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
42
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
535
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
535