报告题目 (Title)：Ultrafast charge migration in atoms, molecules, and solids（原子、分子和固体中的超快电荷迁移）
报告人 (Speaker)：Nikolay Golubev，Assistant Professor（Department of Physics, University of Arizona）
报告时间 (Time)：2023年7月6日(周四) 9:00
报告地点 (Place)：线上Zoom会议 会议号：881 8173 1070 Passcode: 284144
链接：https://us06web.zoom.us/j/88181731070?pwd=b3lwSXZ6enB2ak1IZzlMd0NJbCtLUT09
邀请人 (Inviter)：李永乐 副教授
主办部门：理学院物理系
摘要 (Abstract)：
Photoinduced molecular processes play a key role in physics, chemistry, and biology. In nature, light triggers a large variety of chemical reactions such as photosynthesis, vision, and the formation of vitamin D, but also can cause the radiation damage of biomolecules and photolysis. Furthermore, the interaction of light with matter forms the basis of important technological applications such as solar cells in which photoinduced charge transfer and light harvesting are essential. What all these processes have in common is capturing the energy of light and its transformation into other forms of energy like heat, electricity, or chemical energy. On a microscopic level, this energy conversion process is the result of correlated motion of electrons and nuclei after photoexcitation or photoionization of matter. In this talk, I will discuss our theoretical developments aimed at describing the ultrafast quantum dynamics arising during and after the interaction of atoms, molecules, and solids with intense ultrashort laser pulses. I will present several fully quantum and semiclassical approaches capable of simulating the field-induced electronic and electron-nuclear dynamics in matter in real time and space. Turning theory into practice, I will discuss the possibilities to trace the ultrafast quantum dynamics by means of attosecond transient-absorption spectroscopy and attosecond electron diffraction imaging technique. I will present applications of our developed theoretical techniques to interpret recent pioneering experiments measuring properties of matter with atomic resolution and on attosecond time scales. The ability to simulate and observe the electronic and nuclear dynamics can provide new insights for understanding properties of matter and is of crucial importance to comprehend the diversity of the world or even life.
