Abstract

"Dynamics of quantum phase transitions in ultracold atomic gases"

I will discuss in this talk how dynamics of quantum phase transitions can be studied in ultracold atomic gases. The talk will start with an introduction to cold atom research: a diverse interdisciplinary playground for studies encompassing atomic and molecular physics, condensed matter physics, nonlinear and mathematical physics, as well as quantum optics and quantum information. After the introduction, I will explain the basics of quantum phase transitions, and the reasons why the cold atom studies can provide a significant boost to this field of research traditionally associated with condensed matter physics. Then, I will discuss dynamics of the quantum phase transition in a ferromagnetic Bose Einstein condensate: a beautiful cold atom system currently  studied in various experimental groups worldwide. In particular, I will explain why a symmetry breaking quantum phase transition leads to the formation of magnetic domains and spin vortices, what happens when the condensate undergoes  non equilibrium evolution at the critical point, and how "anti-friction" can be observed in this simple system as well.

Please come meet the speaker over refreshments from 3:45-4:10pm in the foyer on floor G above the lecture hall. All Welcome Host: Doerte Blume