University of PotsdamPhysics DepartmentInterdisciplinary Centre for Photonics

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Quantum information theory


Quantum many-body theory


Quantum optics


Cold atoms in optical lattices


Open quantum systems







 

Open quantum systems:


No quantum systems is entirely isolated from its environment. This basic yet important fact is ultimately responsible for classical features to emerge in quantum systems. We work on how such classical features arise and can lead to exact instances of decohering systems. We are also interested in the mathematical foundations of the study of the dynamics of open quantum systems, related to the theory of dynamical semi-groups, asking for the degree of Markovianity of quantum dynamics.

A core interest in the context of quantum systems interacting with complex baths is the study of quantum "mechanical" effects in opto-mechanical systems that are cooled by means of exploiting radiation pressure. We think of probing actual quantum effects in such exciting mechanical systems.

For a comprehensive list of tutorials and review articles, see this link.

For popular articles about our work, see this link.

                                         
Selected group publications:
  • "Creating and probing macroscoping entanglement with light",
    Physical Review Letters 99, 250401 (2007).
  • "Gently modulating opto-mechanical systems",
    Physical Review Letters 103, 213603 (2009).
  • "Exact decoherence to pointer states in free open quantum systems is universal",
    Physical Review Letters 92, 210401 (2004).
  • "Towards mechanical entanglement in nano-electromechanical devices",
    Physical Review Letters 93, 190402 (2004).
  • "Quantum and classical correlations in quantum Brownian motion",
    Physical Review Letters 89, 137902 (2002).
  • "Quantum evolution from a snapshot",
    Physical Review Letters 101, 150402 (2008).
  • "Hot entanglement in a simple dynamical model",
    Journal of Modern Optics 50, 881 (2003).