Research

The research in our group investigates quantum systems which interact with quantum mechanical fluctuations produced from some external environment. They typically lead to decoherence and relaxation phenomena, before a stationary state in the statistical sense is eventually reached. By the framework of open quantum systems, a vast number of physical systems and effects are described, ranging from excitonic energy transfer in biomolecular light-harvesting complexes, to quantum mechanical charge, spin and heat nonequilibrium transport, to activation phenomena in pumped quantum systems, to cooperative effects in ultracold quantum gases, to the dynamics of a ferromagnetic domain wall under the influence of a spin-polarized current, to name only those which are in the focus of our research group.

  • Theory of nonequilibrium quantum transport
  • Time-dependent dissipative quantum systems
  • Nanoelectromechanical systems (NEMS)
  • Analytical and numerical real-time path-integral techniques
  • Disordered ultracold atom gases
  • Nanomagnetism and spin torque
  • Luttinger liquid behavior in carbon nanotubes
  • Quantum hysteresis and quantum stochastic resonance