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
Certifying the Topology of Quantum Networks: Theory and Experiment
Certifying the Topology of Quantum Networks: Theory and Experiment
Multiparticle singlet states cannot be maximally entangled for the bipartitions
Multiparticle singlet states cannot be maximally entangled for the bipartitions
Revealing hidden physical nonclassicality with nonnegative polynomials
Revealing hidden physical nonclassicality with nonnegative polynomials
Otto cycles with a quantum planar rotor
Otto cycles with a quantum planar rotor
Analyzing Quantum Entanglement with the Schmidt Decomposition in Operator Space
Analyzing Quantum Entanglement with the Schmidt Decomposition in Operator Space
Distinguishing Graph States by the Properties of Their Marginals
Distinguishing Graph States by the Properties of Their Marginals
Quantum Speed Limit for States and Observables of Perturbed Open Systems
Quantum Speed Limit for States and Observables of Perturbed Open Systems
su(d)-squeezing and many-body entanglement geometry in finite-dimensional systems
su(d)-squeezing and many-body entanglement geometry in finite-dimensional systems
Quantum limits of position and polarizability estimation in the optical near field
Quantum limits of position and polarizability estimation in the optical near field
Aging and reliability of quantum networks
Aging and reliability of quantum networks
Characterizing high-dimensional quantum contextuality
Characterizing high-dimensional quantum contextuality
Quantifying information flow in quantum processes
Quantifying information flow in quantum processes
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.