Dynamics of Correlated Electrons at Quantum Phase Transitions

• Antragsteller: Privatdozent Dr. Ralf Bulla; Professor Dr. Stefan Kehrein
• Fachliche Zuordnung: Theoretische Physik der kondensierten Materie
• Förderung: Förderung von 2007 bis 2011
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 48554140

The aim of this project is to achieve a deeper understanding of the dynamics of correlated electrons close to quantum phase transitions. Investigations will be performed using two non-perturbative techniques, the flow equation method and Wilson's numerical renormalization group, partly within the framework of dynamical mean-field theory. One focus of the proposed research are magnetic quantum phase transitions in heavy-fermion systems, in particular the detailed calculation of the phase diagram and physical properties close to the phase boundaries. We will also study non-equilibrium effects close to quantum phase transitions, in particular the dielectric breakdown of Mott insulators and the emergence of long-range order after a quench.

• DFG-Verfahren: Forschungsgruppen
• Teilprojekt zu: FOR 960: Quantum Phase Transitions