arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.00873physics.chem-phcond-mat.mtrl-sci
收藏

预热密度泛函理论

Warming Up Density Functional Theory

Justin C. Smith, Francisca Sagredo, Kieron Burke

摘要:

密度泛函理论(DFT)已经成为跨学科研究电子结构的最流行的方法,特别是在材料和化学科学中。去年,至少有30,000篇论文使用DFT进行了有用的预测或深入了解了大量科学问题,从电池开发到太阳能电池效率等等。这一领域的成功是由基于已知精确条件和仔细测试和验证的有效精确近似驱动的。在过去的十年中,DFT在一个新的领域,热密物质,应用爆炸。密度泛函理论正在革新对温暖致密物质的模拟,包括在受控聚变、行星内部和其他高能量密度物理领域的应用。在过去十年左右的时间里,由现代密度泛函理论驱动的分子动力学计算在将化学现实主义引入这些应用方面发挥了至关重要的作用,通常(但不总是)与实验非常吻合。本章总结了我们小组最近在非零温度下的密度泛函理论的工作,我们称之为热DFT。我们解释的相关性,这项工作的背景下,温暖的致密物质,量子化学的重要性,这一制度。我们说明了一个简单的模型系统,不对称哈伯德二聚体的许多基本概念。

英文摘要:

Density functional theory (DFT) has become the most popular approach to electronic structure across disciplines, especially in material and chemical sciences. Last year, at least 30,000 papers used DFT to make useful predictions or give insight into an enormous diversity of scientific problems, ranging from battery development to solar cell efficiency and far beyond. The success of this field has been driven by usefully accurate approximations based on known exact conditions and careful testing and validation. In the last decade, applications of DFT in a new area, warm dense matter, have exploded. DFT is revolutionizing simulations of warm dense matter including applications in controlled fusion, planetary interiors, and other areas of high energy density physics. Over the past decade or so, molecular dynamics calculations driven by modern density functional theory have played a crucial role in bringing chemical realism to these applications, often (but not always) with excellent agreement with experiment. This chapter summarizes recent work from our group on density functional theory at non-zero temperatures, which we call thermal DFT. We explain the relevance of this work in the context of warm dense matter, and the importance of quantum chemistry to this regime. We illustrate many basic concepts on a simple model system, the asymmetric Hubbard dimer.

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。

↑