Nonequilibrium physics in quenched fermionic models in two dimensions

二维淬火费米子模型中的非平衡物理

• 批准号: 354412377
• 负责人: Professor Dr. Götz S. Uhrig
• 金额: --
• 依托单位: Forschungsgruppen Theorie der Kondensierten Materie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/354412377?language=en
• 关键词: Nonequilibrium; physics; quenched; fermionic; models

Refined experimental techniques based on ultracold gases in optical lattices, created by intense laser fields, have allowed for studies of closed quantum systems far away from equilibrium. Recently, fermionic systems have come into focus. This project aims at a quantitative understanding of the nonequilibrium fermionic dynamics as it appears in the time evolution of the Fermi surface after an abrupt changes (quenches) of the system's parameters. The algorithms will be developed further to address longer times such as relaxation times and their momentum dependence. The region around dynamical phase transitions is particularly fascinating and challenging. The interesting properties of steady states approached at infinite times will be accessed via the contributions with stationary phases.

基于强激光场产生的光学晶格中的超冷气体的精细实验技术，已经允许研究远离平衡的封闭量子系统。近年来，费米子系统成为人们关注的焦点。该项目旨在定量了解非平衡态费米动力学，因为它出现在费米表面的时间演化后，系统的参数突然变化（淬火）。这些算法将进一步发展，以解决更长的时间，如弛豫时间和它们的动量依赖性。动力学相变的区域特别吸引人和具有挑战性。在无限次接近稳态的有趣的属性将通过与固定相的贡献访问。