吉大物理70年系列学术活动——交叉科学青年论坛(42)

时间:2022-11-17    点击:

报告题目:Velocity-gauge real-time density functional tight-binding method for large-scales systems

报告人:许强

报告时间:2022112412:00

腾讯会议:824-421-415


报告摘要

  Real-time time-dependent density functional theory in the velocity gauge can probe the electronic excitations of solid-state systems; however, its immense computation cost makes it prohibitive for large systems. In this work, we developed an efficient velocity-gauge real-time method based on density functional tight-binding (VG-rtTDDFTB). We show that the VG-rtTDDFTB absorption spectrum and electron dynamics can generally reproduce the correct spectra for both molecular clusters and periodic systems. Furthermore, we show that the high efficiency of VG-rtTDDFTB allows the simulation of thousands of atoms (only 1 CPU core is used), which provides a promising alternative for computing the electronic excitations of large systems.


报告人简介

  许强,2020年于威利斯人娱乐app下载获得博士学位,先后在威利斯人娱乐app下载,美国劳伦斯国家实验室和加州大学河滨分校开展博士后研究工作。入选威利斯人娱乐app下载“金种子计划”。研究课题是大尺度复杂系统计算理论和方法发展。


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