应我校物理系现代光学研究所姜永远教授邀请，美国内布拉斯加大学IlyaFabrikant教授近日来我校进行学术交流。讲座报告内容、时间和地点如下，报告涉物理、化学等领域，欢迎感兴趣的老师和同学积极参加！

时间：2015年5月26日（星期二），上午9:30

地点：理学楼308

报告: Tunneling Ionization in Atoms and Molecule

摘要: Quantum tunneling is one of fundamental problems in physics. In the area of atomic and molecular physics tunneling is usually associated with ionization of atoms and molecules in external electric fields. We have developed two approaches to the theoretical description of this process. One is based on the semiclassical complex-time method. In this approach the wave function in the classically forbidden region is calculated from the solution of classical equations of motion in the complex time plane. This method has been developed and applied to tunneling ionization of several atoms and molecules. The second approach is purely quantum-mechanical, and is based on the Green's function for the electron motion in the superposition of the Coulomb and laser fields. This method works well in a broad range of electric fields and allows us to get a smooth transition from the tunneling regime into the region where the ionization is allowed classically.

IlyaFabrikant教授简介：Professor IlyaFabrikant got his Ph.D in Institute of Physics, Latvia in 1974. He is a full professor at University of Nebraska-Lincoln since 1995. He is a Fellow of the American Physical Society. And his research lies in the field of atomic, molecular and optical physics, mainly including Electron-Atom and Electron-Molecule Collisions; Electron Attachment to Physisorbed Molecules; Collisions of Rydberg Atoms with Neutral Atoms and Molecules; Atomic Processes in External Fields; Negative Ion Decay and Multiphoton Ionization of Atoms and Molecules. He was invited to give 94 lectures, colloquia and seminars at universities and government laboratories. He served as chairs or Committee Members of more than 10 international conferences and meetings.