Software for the frontiers of quantum chemistry: An overview of developments in the Q-Chem 5 package.

Software for the frontiers of quantum chemistry: An overview of developments in the Q-Chem 5 package.
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DOI:
10.1063/5.0055522
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发表时间:
2021-08-28
期刊:
The Journal of chemical physics
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其他
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本文总结了Q-Chem量子化学程序包第五个主要版本中包含的技术进展,涵盖了自2015年以来的发展。一个全面的交换相关函数库,沿着一套相关的多体方法,仍然是Q-Chem软件的标志。多体方法包括耦合团簇和组态相互作用方法的新变体沿着,以及基于代数图解构造和变分约化密度矩阵方法的方法。Q-Chem 5中强调的方法包括一套用于模拟核心水平光谱的工具,描述亚稳共振的方法,计算振动光谱的方法,核电子轨道方法和几种不同的能量分解分析技术。高性能的能力,包括多线程并行和图形处理单元上的计算支持。Q-Chem拥有一个由100多名活跃的学术开发人员组成的社区,软件的持续发展受到“开放式团队”模型和日益模块化的设计的支持。
This article summarizes technical advances contained in the fifth major release of the Q-Chem quantum chemistry program package, covering developments since 2015. A comprehensive library of exchange–correlation functionals, along with a suite of correlated many-body methods, continues to be a hallmark of the Q-Chem software. The many-body methods include novel variants of both coupled-cluster and configuration-interaction approaches along with methods based on the algebraic diagrammatic construction and variational reduced density-matrix methods. Methods highlighted in Q-Chem 5 include a suite of tools for modeling core-level spectroscopy, methods for describing metastable resonances, methods for computing vibronic spectra, the nuclear–electronic orbital method, and several different energy decomposition analysis techniques. High-performance capabilities including multithreaded parallelism and support for calculations on graphics processing units are described. Q-Chem boasts a community of well over 100 active academic developers, and the continuing evolution of the software is supported by an “open teamware” model and an increasingly modular design.
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