Complex Quantum Systems | From Quantum Networks to Quantum Simulators

A key challenge in experimental Quantum science is to identify isolated quantum mechanical systems that can be manipulated and coupled in a scalable fashion, but at the same time display good coherence properties. During the last years substantial progress has been made towards the physical implementation of quantum registers with a few-qubits using systems of coupled trapped ions and superconducting devices. However, the manipulation of large, multi-qubit systems remains an outstanding challenge. Such systems, once realized would yield ideal hardware for the simulation of quantum systems. For this reason, approaches to connect few-qubit registers and to build a large scale circuit are currently being explored both theoretically and experimentally. Candidates to realize such circuits are trapped ions, ultra-cold atoms in optical lattices, strongly interacting Rydberg atoms, nitrogen-vacancy (NV) centers in diamonds, quantum dots, and molecular nanomagnets.

Research topics (groups)

  • Design of quantum simulators and quantum many-body dynamics (Büchler, Daghofer, Hecker Denschlag, Jelezko, Kaiser, Pfau, Plenio, Wrachtrup)
  • Investigation of open quantum systems (Ankerhold, Calarco, Montangero, Plenio, Huelga)
  • Experimental implementation of scalable synthetic quantum systems and devices (Frühauf, Kubanek, Jelezko, Michler, Pfau, Schulze, van Slageren, Wrachtrup)
  • Theory of optimal control of quantum systems from few- to many-body level to develop quantum technologies under realistic experimental conditions (Ankerhold, Calarco, Montangero)
  • Mathematical modeling, simulation, and optimization of quantum many-body systems (Büchler, Schleich, Takagi, Urban)