Quantum Matter Theory

The research within the programme Quantum Matter Theory focuses on condensed matter where quantum mechanical effects in a very prominent way determine the properties.

Current research interests span several contemporary areas in modern physics, such as unconventional superconductivity, topological matter, non-equilibrium physics, strongly correlated systems, ultracold atoms, and quantum information. Beyond a natural connection between several of these areas, a strongly unified focus of the research is the methodology, where low-energy models for complex and quantum mechanical many-body systems play a central role. While the research is naturally linked to more material specific research, the overarching focus here is on understanding the physics of matter on a conceptual and unified level.

Topological Quantum Matter

Topological quantum matter encompasses large classes of materials where the electronic structure hosts a global non-trivial topology. We are interested in understanding and describing the unique properties of topological quantum matter, including topologically protected edge states, distinctive bulk transport, and effects of a nontrivial quantum metric.

Superconductivity

Superconductivity is a uniquely quantum mechanical phenomenon visible on the macroscopic scale, that despite decades of intense research is still hard to understand and control. We work on describing the mechanisms and properties of unconventional, topological, and inhomogeneous superconductivity.

Non-Equilibrium Condensed Matter Physics

Physical phenomena occur in general under non-equilibrium conditions, because of time-dependence, influence from external force fields, and local variations in the environment. Developments of new theoretical frameworks for studies of dynamical aspects of correlated materials under non-equilibrium conditions is one of our central tasks.

Quantum Information

Quantum information is a rapidly developing cross-disciplinary field of research. It covers research topics varying from modern quantum technological applications, such as quantum communication, sensing and quantum computing, to foundational questions, such as entanglement and non-locality that were in the core of the 2022 Nobel Prize in physics.

Magnetism and superconductivity in correlated materials

Interacting electrons display a number of emerging phenomena where the properties of the ensemble are very different from the constituents. Phases like magnetism and superconductivity can be understood from quantum mechanics, and become interesting when multiple degrees of freedom are available.