Within the key profile area Quantum Matter and Information (QMI) groups from physics, chemistry and mathematics collaborate to explore the fundamental properties of quantum matter making use of their relationship to principles of quantum information. Highlighted below are selected current research topics with additional background and publications available on the linked webpages.

Devices for Quantum Computing

Within the cluster of excellence Matter and Light for Quantum Computing (ML4Q) and CRC1238 we investigate novel physics in quantum materials by nano-fabricating quantum devices, which can serve as building blocks for future quantum bits and quantum technologies. Our research employs, for example,  2D materials to engineer quantum bits coupled to light and explores hybrid materials—combining topological insulators, magnets, and superconductors—to realize robust Majorana quantum bits intrinsically resistant to errors.

Entangled States of Matter and Monitored Quantum Systems

Concepts of quantum information are used to explore highly entangled phases of matter such as spin liquids or engineered quantum states realized in quantum circuits (CRC/TR 183, ML4Q).  We study monitored quantum circuits to understand the fundamental role of measurement and randomness in shaping quantum correlations and investigate the generation and evolution of quantum resources, including entanglement, quantum magic, and the effects of quantum chaos.

Quantum Functional Materials

We develop a wide range of materials with extraordinary surface-, interface-, nano-, and bulk properties (CRC1238, TIDE). Our research explores organic–inorganic composites, hybrid nanoparticles, novel two-dimensional materials, and strongly correlated matter. We also investigate hybrid devices that combine topological insulators with superconductors and magnets, and we design materials for applications in photovoltaics and organic electronics.

Quantum Matter far from Equilibrium

New phenomena emerge when quantum matter is driven far from thermal equilibrium. Our research (CRC1238, CRC/TR 183) investigates the realization of novel non-equilibrium states of matter, pump-probe spectroscopy, the control and dynamics of topological defects, and the behaviour of noisy quantum circuits. We also explore the concept of “active quantum matter,” identifying new universality classes that govern non-equilibrium quantum physics.

Organic Electronics and Nanophotonics

We investigate how molecular-level structural control can enhance the performance of organic electronic devices, including organic light-emitting diodes, solar cells, and transistors  (TIDE). Organic-inorganic hybrids are another promising material class. At the Center for Nano- and Biophotonics, we develop nano and micro scale devices that combine light and soft materials, such as nanolasers for in vivo biosensing.

Mathematics of Quantumness

We explore the mathematical structures connecting quantization and geometry. Furthermore, our research focuses on quantifying the resources underlying quantum codes, such as entanglement and magic, and on understanding the connections between classical information, quantum information and error correction.