百年物理·学术报告| Controlling quantum systems by driving and dissipation

发布日期:2025-10-20 浏览量:

报告题目:Controlling quantum systems by driving and dissipation

报 告 人:André Eckardt, TU Berlin

报告时间:2025年10月23日 16:00

报告地点:物理楼W101报告厅

内容摘要:In recent years, we have seen major progress in the non-equilibrium control of many-body quantum systems. One tool, which has been applied successfully, is Floquet engineering, i.e. the use of strong time-periodic driving for effectively changing the properties of the system. A prominent example is the realization of effective magnetic fields for charge neutral particles. Another approach is known as reservoir engineering. Here the system is coupled to a controlled environment, which is designed to either cool the system or to stabilize a non-equilibrium steady state of interest. I will report on recent theoretical work, where we combine both approaches in open Floquet systems. One motivation is to use dissipation in order to counteract unwanted heating as it necessarily occurs in Floquet engineered systems, e.g. for the preparation of Floquet engineered topological states of matter. The other motivation is the stabilization of interesting non-equilibrium steady states beyond the strict constraints of thermal equilibrium. Here I will discuss driving-induced non-equilibrium Bose condensation in high-temperature environments.

报告人简介:André Eckardt studied physics in Darmstadt, Salamanca and Oldenburg, where he also graduated in 2007 under the supervision of Martin Holthaus. From 2008-2011, he joined the group of Maciej Lewenstein at ICFO in Barcelona as a postdoc, before leading his own research team at the Max-Planck-Institute for the Physics of Complex Systems in Dresden between 2011 and 2020. In 2020 his group moved to TU Berlin, where he took the position of a full professor. Currently, André Eckardt is the spokesman of the collaborative research project “Driven-dissipative many-body systems of ultracold atoms” funded by the German Research Foundation.