Quantum information theory

Quantum information science asks what information processing tasks are possible if single quantum systems are used as elementary carriers of information. The ability to coherently manipulate the state of a quantum system allows for tasks that are thought to be unachievable in the classical context - such as inherently secure transmission of information - or for the efficient solution of computational problems for which no classical efficient algorithm is known.

We ask - with methods of mathematical physics - questions of what manipulation of quantum information is possible,  quantum channel capacities, and new and counterintuitive quantum computational models, based on measurements or dissipation only. A recent emphasis is on notions of entanglement distillation and repeaters as well as randomness.

Selected group publications

Group reviews