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arXiv 2004.06584cond-mat.mtrl-sciphysics.comp-ph
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在热力学极限下将耦合团簇模拟应用于固体和表面

Applying the Coupled-Cluster Ansatz to Solids and Surfaces in the Thermodynamic Limit

Thomas Gruber, Ke Liao, Theodoros Tsatsoulis, Felix Hummel, Andreas Grüneis

摘要:

现代电子结构理论可以预测和模拟表面科学和固体物理中的大量现象。为了允许与实验直接比较,这种从头计算预测必须在热力学极限下进行,这大大增加了多电子波函数理论的计算成本。在这里,我们提出了一种方法,实现了热力学极限结果的固体和表面使用的“金标准”耦合集群ananadministration的量子化学与前所未有的效率。我们研究了碳金刚石和石墨晶体之间的能量差,水在h-BN上的吸附能,以及Ne固体的结合能,证明了固体和表面的耦合簇理论的效率和准确性的提高。

英文摘要:

Modern electronic structure theories can predict and simulate a wealth of phenomena in surface science and solid-state physics. In order to allow for a direct comparison with experiment, such ab initio predictions have to be made in the thermodynamic limit, substantially increasing the computational cost of many-electron wave-function theories. Here, we present a method that achieves thermodynamic limit results for solids and surfaces using the "gold standard" coupled cluster ansatz of quantum chemistry with unprecedented efficiency. We study the energy difference between carbon diamond and graphite crystals, adsorption energies of water on h-BN, as well as the cohesive energy of the Ne solid, demonstrating the increased efficiency and accuracy of coupled cluster theory for solids and surfaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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