Seminars on Numerical Algorithms, Analyses, and Applications:Optimization Models and Approaches for Strictly Correlated Electrons

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:刘歆(中国科学院数学与系统科学研究院)
:2023-05-10 10:30
:海韵园数理大楼686报告厅

报告人:刘歆(中国科学院数学与系统科学研究院)

 间:2023510日上午10:30-12:00 

 点:海韵园数理大楼686报告厅

内容摘要:

In electronic structure calculations, Kohn-Sham equations rank among the most widely adopted mathematical models. However, due to the deficiency of available approximations for exchange-correlation energy, Kohn-Sham equations cannot well describe strictly correlated electrons at present. To this end, some models based on the strong-interaction limit of density functional theory have been developed in recent decades. The associated energy minimizations can be formulated as multi-marginal optimal transport problems with Coulomb cost (MMOT). Since the curse of dimensionality resides in MMOT, its low-dimensional reformulations are indispensable. In this talk, we consider the reformulation based on a Monge-like ansatz. We discuss the difficulties in the corresponding optimization problems, and also propose a global optimization approach for numerical resolution.

人简介

刘歆,中国科学院数学与系统科学研究院“冯康首席研究员”,博士生导师,计算数学与科学工程计算研究所副所长国家杰青(2021)国家优青(2016)。刘歆2004年本科毕业于北京大学数学科学学院并于2009年在中国科学院数学与系统科学研究院获得博士学位。主要研究方向包括流形优化、分布式优化及其在材料计算、大数据分析和机器学习等领域的应用。刘歆于2016年获得中国运筹学会青年科技奖;2020年获得中国工业与应用数学学会应用数学青年科技奖。现担任MPC, JCM, JIMO, APJOR等国内外期刊编委;中国运筹学会常务理事, 科普工作委员会主任,中国工业与应用数学会副秘书长。

 

联系人:陈黄鑫