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Nonadiabatic molecular dynamics with decoherence and detailed balance under a density matrix ensemble formalism

时间:2023-01-09

报告题目:Nonadiabatic molecular dynamics with decoherence and detailed balance under a density matrix ensemble formalism

报告人:康俊 研究员(北京计算科学研究中心)

报告时间:2023年1月9日14:00-15:00

腾讯会议:465-367-083

摘要:Decoherence and detailed balance are two major issues for mixed quantum/classic nonadiabatic molecular dynamics (NAMD) simulations. In this work we introduce a new mean-field dynamics approach with decoherence and detailed balance for NAMD. This method is able to explicitly treat the decoherence between different pairs of electronic states. Moreover, the energy-increasing and energy-decreasing electronic transitions are distinguished by dividing the density matrix into two parts. The detailed balance correction is then included by a Boltzmann factor applied to the energy-increasing transitions. The application of this method in hot carrier dynamics in nanocrystals will also be discussed.

简介:康俊,北京计算科学研究中心特聘研究员。2009年本科毕业于厦门大学,2014年博士毕业于中国科学院半导体研究所,2014-2019年先后在比利时安特卫普大学和美国劳伦斯伯克利国家实验室从事博士后研究。2019年入选国家级青年人才计划项目,并加入北京计算科学研究中心工作。主要从事半导体材料和器件的计算模拟和理论设计研究,包括能带调控机制、缺陷和杂质、输运特性和激发态等。目前在Nat. Mater.、Nat. Commun.、Nano Lett.、PRB/Appl/Mater等期刊发表论文80余篇,引用8000余次,入选爱思唯尔中国高被引学者。曾获2017年度国家自然科学二等奖(第三完成人)。