Hebrew University of Jerusalem

报告人简介

Eberhard Gross received his PhD in Physics in 1980 at the Goethe University in Frankfurt, Germany. After a postdoctoral stay at the same university, he joined the group of Walter Kohn at the University of California, Santa Barbara, first as a postdoc, then as a Heisenberg fellow. In 1990, he became Professor of Physics at the University of Wuerzburg, Germany. From 2001 he had the Chair of Theoretical Physics at the Free University of Berlin, and from 2009 to 2019 he was Director of the Max Planck Institute of Microstructure Physics in Halle, Germany. Since 2017, he is Professor of Chemistry at the Hebrew University of Jerusalem, Israel. Together with Erich Runge, he laid the foundation of time-dependent density functional theory. He furthermore developed the Ensemble DFT of excited states, and an ab-initio theory of phonon-driven superconductivity. In recent years, he developed the exact factorization, a novel methodology describing all aspects of non-adiabatic chemical dynamics, in particular electronic decoherence and the molecular Berry phase. His work has been recognized with several prizes and awards, including the 2016 Bernie Alder CECAM prize, the 2016 Tsungming Tu prize in Taipei, the Schlumberger Award with medal, and the CMOA senior medal. He is a member of the International Academy of Quantum Molecular Science, a Fellow of the American Physical Society and a Mercator Fellow of the German Science Foundation (DFG).

报告摘要

The basic idea of “functional theories” is to describe nature in terms of simple reduced quantities rather than the full many-body wave function. Prominent examples of functional theories are density-functional theory as well as Green-function-functional theory (better known as many-body perturbation theory). After an overview of the basic concepts of standard ground-state density functional theory (DFT) as well as time-dependent DFT (TDDFT), the description of quantum phases, such as magnetism and superconductivity within these frameworks will be addressed. The idea is to include the order parameter describing the respective quantum phases or the corresponding Green function explicitly [1,2] in the formalism. This can be done both in the static case and in systems driven far from equilibrium. As a real-world example, the ultrafast laser-induced spin dynamics in magnetic materials will be simulated [3] and first steps [1, 4] toward the analogous treatment of superconductors driven by external fields will be presented.

[1] O.J. Wacker, R. Kuemmel, E.K.U. Gross, Phys. Rev. Lett. 73, 2915 (1994).

[2] F.G. Eich, E.K.U. Gross, Phys. Rev. Lett. 111, 156401 (2013).

[3] J.K. Dewhurst, P. Elliott, S. Shallcross, E.K.U. Gross, S. Sharma , Nano Lett. 18,1842 (2018).

[4] CY Wang, S Sharma, T Müller, EKU Gross, JK Dewhurst, Phys. Rev. B 105, 174509 (2022)

腾讯视频会议号：942-399-323，密码：241029

邀请人：孟胜 研究员

联系人：万源 研究员

             汪非凡 副研究员

             田春璐 cltian@iphy.ac.cn

主办方：中国科学院物理研究所、松山湖材料实验室