规模化的量子电动力学合集群:复杂系统的高性能实现
Nicholas P Bauman1, Himadri Pathak2, Marcus D Liebenthal1
1Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.
Journal of chemical theory and computation
|December 15, 2025
概括
我们开发了一种支持GPU的量子电动力学合集群方法 (QED-CC),用于模拟复杂的化学反应. 这种名为QED-CCSD的新方法能够准确地预测更大的系统中空腔修饰化学的情况.
科学领域:
- 量子化学是一种量子化学.
- 计算物理学的计算物理.
- 化学反应的动态化学反应的动态
背景情况:
- 合集群 (CC) 理论准确地模拟了量子系统.
- 量子电动力学 (QED) 将CC理论扩展到模拟电子-光子相互作用,从而实现空腔修饰化学.
- 使用QED-CC模拟较大的系统在计算上昂贵,并且缺乏可扩展的基础设施.
研究的目的:
- 介绍一个支持GPU的,高性能,开源的QED-CC实现单双激发 (QED-CCSD).
- 使用TAMM基础设施将QED-CCSD集成到ExaChem量子化学软件包中.
- 证明模拟较大的系统的能力,并分析光子自由度对基态属性的影响.
主要方法:
- 开发了一个支持GPU的QED-CCSD实现.
- 利用了多体方法 (TAMM) 的 Tensor Algebra,在异质超级计算平台上实现可扩展的性能.
- 执行数值基准来验证实施和评估可扩展性.
主要成果:
- 在 ExaChem 中成功实施和验证了 GPU 加速的 QED-CCSD 方法.
- 证明了模拟比以前使用QED-CC方法更大的量子系统的能力.
- 展示了如何结合光子自由度影响模拟系统的基本状态属性.
结论:
- 开发的QED-CCSD实现提供了一个可扩展和高效的方法来模拟腔修饰化学.
- ExaChem由TAMM提供动力,为高性能量子电动力学合集群计算提供了一个强大的平台.
- 这一进步使更大,更复杂的系统中受到光物质相互作用影响的化学反应的准确预测更加容易.
相关概念视频
02:45The Quantum-Mechanical Model of an Atom
56.4K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
56.4K
03:35Hybridization of Atomic Orbitals II
47.5K
sp3d and sp3d 2 Hybridization
47.5K
01:23Equilibrium Conditions for a Particle
2.1K
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
2.1K
03:24Hybridization of Atomic Orbitals I
65.2K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
65.2K
01:27π Electron Effects on Chemical Shift: Overview
1.6K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.6K
03:21The Energies of Atomic Orbitals
29.8K
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
29.8K