A7: Feedback control of coherent and collective quantum processes
PD Dr. Gernot Schaller 
We will develop a theoretical description of delayed feedback
control for quantum transport processes,
implement a microscopic analogon of coherent feedback control, and provide a thorough thermody-
namic interpretation of feedback in presence of quantum coherence. We will furthermore introduce
delayed feedback control for dissipative quantum phase transitions and study the phase diagram and the
appearance of quantum chaos in Dicke-Hepp-Lieb superradiance and other models.