| 报告题目 | Accurate ab initio computations of electron correlation effects: an auxiliary-field perspective |
| 报告人 | Prof. ZHANG Shiwei(张世伟) |
| 报告人单位 | College of William and Mary, USA |
| 报告时间 | 2015-07-22 |
| 报告地点 | 合肥微尺度物质科学国家实验室一楼科技展厅 |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心 |
| 报告介绍 | 报告摘要：
Understanding the properties of quantum matter remains a grand challenge in physical sciences. Computation has an integral role to play in tackling this challenge. I will give an introduction to the fundamental issues facing accurate and predictive computations of quantum systems, and then describe recent progress in combining field-theory and Monte Carlo simulations for computations in many-fermion systems. This framework can be used for realistic materials simulations as well as lattice model studies. As an example of the former, results will be presented on the binding and magnetic properties of Cobalt adatom on graphene, a setup that has drawn interest for possible spintronics applications. As an example of lattice model calculations, we determine ground-state properties of the Hubbard model, which is important in the context of high-Tc superconductivity and whose laboratory emulation is one of the major goals for optical lattice experiments.
报告人简介：
Shiwei Zhang received a B.S. in Physics from the University of Science and Technology of China in 1988. He then attended Cornell University via the CUSPEA program and received a Ph.D. in Physics in 1993. After two years at Los Alamos National Laboratory as a Postdoctoral Research Associate and then briefly at Ohio State University as an NSF Postdoctoral Fellow and University Postdoctoral Fellow, he joined the faculty at William and Mary in 1996, where he is now Professor of Physics. Dr. Zhang is a Fellow of the American Physical Society. He has received a number of awards, including the NSF Faculty CAREER Award, the Cottrell Scholar Award, and the Plumeri Award for Faculty Excellence. He is principal investigator of multiple research collaboration teams of leading US institutions. He has made many fundamental contributions in the computational studies of quantum systems. Methods he pioneered have been applied in condensed matter physics, quantum chemistry, ultra-cold atoms, and nuclear physics. |
