Quantum Information is concerned with studying the way in which the laws of quantum mechanics can be used to store and process information and to perform computations. In particular, the possibility of creating superpositions of classical states, and to create correlations without a classical correspondence give rise to a wide range of new phenomena in data processing and computation.
Our research covers a wide range of topics in Quantum Information:
Quantum computers hold the promise to outperform classical computers by using quantum superpositions. We study how quantum computers and simulators can be used for the solution of quantum mechanical problems in condensed matter, quantum chemistry, and high-energy physics, and explore ways in which intermediate-scale near-term quantum devices can offer an advantage over classical computers.
We develop fundamental tests of quantum mechanics which allow to distinguish from classical theories (so-called "local hidden variable models"), and study the perspective offered by quantum theory on other fundamental theories such as thermodynamics.
Entanglement – correlations between particles which cannot be explained classically – is arguably the most peculiar feature of quantum physics. We work on the classification of the possible types of entanglement in different setups, its quantification in operationally meaningful ways, and its use as a resource for different physical tasks.