290S/290K Quantum Materials Seminar speaker Frederik Nathan (Niels Bohr Institute) on Tuesday, May 2 at 2:30 pm in Campbell 101/CQCS

Time/Venue Tuesday, May 2 at 11 am in tba conference room and via Zoom:
https://berkeley.zoom.us/j/99523499113pwd=REovb3pyam03WXQwbEhrU3dqNHZvdz09
Host Ehud Altman
Title Universal Lindblad Equation for Open Quantum Systems
Abstract We develop a Markovian master equation in the Lindblad form that enables the efficient study of a wide range of open quantum many-body systems that would be inaccessible with existing methods. The validity of the master equation is based entirely on properties of the bath and the system-bath coupling, without any requirements on the level structure of the system. The master equation is derived rigorously using aMarkov approximation distinct from earlier approaches.  We discuss how our method can be applied to static or driven quantum many-body systems, and illustrate its power through numerical simulation of a spin chain that would be challenging to treat by existing methods.