Our research profile
Our research group focuses on foundational questions in quantum information and open quantum systems. A first major topic is the phenomenon of quantum entanglement between two or more particles. Here, we are developing analytical approaches to characterize the different forms of entanglement and their usefulness.
A second major topic is quantum thermodynamics. There, we extend and refine the thermodynamical laws using tools from quantum optics and information theory in order to understand how microscopic quantum systems exchange heat, work, and information with their environment.
Third, we are developing methods to analyze and improve quantum information processing devices using tools like shadow tomography or error mitigation.
In this research, the group forges a bridge from advanced mathematical methods to collaborations with experimentalists. We work closely with other groups doing quantum science at the University of Siegen. In addition, we collaborate with many partners around the world, e.g., from Austria, Brazil, China, France, Poland, Spain, and Sweden.
Main research areas
- Multi-particle Entanglement
- Graph States and the Stabilizer Formalism
- Theory of Measurements in Quantum Mechanics
- Open Quantum Systems
- Bayesian Metrology
- Shadow Tomography
Our courses
We offer various lectures and courses for the Bachelor's degree program in Physics, the Master's degree program in Physics, and the Master's degree program in Quantum Science program. The courses of the current semester can be viewed and booked on unsiono and can be booked. The regularly offered courses are
- Introduction to Quantum Theory
- Concepts of Quantum Science
- Quantum Thermodynamics
- Key Concepts of Theoretical Physics
- Foundations of Quantum Mechanics
- Quantum Information Theory
- Machine Learning
Our publications
Proving genuine multiparticle entanglement from separable nearest-neighbor marginals
Proving genuine multiparticle entanglement from separable nearest-neighbor marginals
The structure of ultrafine entanglement witnesses
The structure of ultrafine entanglement witnesses
Changing the circuit-depth complexity of measurement-based quantum computation with hypergraph states
Changing the circuit-depth complexity of measurement-based quantum computation with hypergraph states
Convex Optimization over Classes of Multiparticle Entanglement
Convex Optimization over Classes of Multiparticle Entanglement
Full-field cavity enhanced microscopy techniques
Full-field cavity enhanced microscopy techniques
Entropic steering criteria: Applications to bipartite and tripartite systems
Entropic steering criteria: Applications to bipartite and tripartite systems
Lower bounds for genuine multipartite entanglement and coherence measures
Lower bounds for genuine multipartite entanglement and coherence measures
Structure of temporal correlations of a qubit
Structure of temporal correlations of a qubit
Bounds on absolutely maximally entangled states from shadow inequalities, and the quantum MacWilliams identity
Bounds on absolutely maximally entangled states from shadow inequalities, and the quantum MacWilliams identity
Coarse graining of entanglement classes in 2×m×n systems
Coarse graining of entanglement classes in 2×m×n systems
Enhanced entanglement criterion via symmetric informationally complete measurements
Enhanced entanglement criterion via symmetric informationally complete measurements
Work production of quantum rotor engines
Work production of quantum rotor engines
Postal address
University of Siegen
Department of Physics
Emmy-Noether-Campus
Walter-Flex-Straße 3
57072 Siegen
Germany
Visitor address
University of Siegen
Department of Physics
Emmy-Noether-Campus, Room B-107
Walter-Flex-Straße 3
57072 Siegen
Germany
Secretariat
You can find the contact details of the group members in the team overview.