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






 

Cold atoms in optical lattices:


An optical lattice is generated by counterpropagating laser beams, creating a periodic intensity pattern. Due to the periodic potential, neutral atoms can be trapped using the Stark shift, giving rise to artificial quantum lattice systems allowing for an enormous degree of control over the system's parameters. In such systems, signatures of quantum phase transitions can be observed, and they may also serve as promising candidates for quantum information processing.

We are mainly concerned with non-equilibrium phenomena in quenched systems of atoms in optical lattices, with questions of temperature effects and adiabatic heating, as well as with complex mixed lattice models, including Bose-Fermi mixtures. Recently, questions of probing questions concerning disordered systems have been addressed, and ideas on realizing computational models have been implemented. This work is partially done in collaboration with experimentalists.

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

For popular articles about our work, see this link.

                                          
Selected group publications:
  • "Exploring local quantum many-body relaxation by atoms in optical superlattices",
    Physical Review Letters 101, 063001
    (2008).
  • "Do mixtures of bosonic and fermionic atoms adiabatically heat up in optical lattices?",
    Physical Review Letters 100, 140409 (2008).
  • "Quenching, relaxation, and a central limit theorem for quantum lattice systems",
    Physical Review Letters
    100, 030602 (2008).
  • "Inhomogeneous Bose-Fermi mixtures in cubic lattices",
    Physical Review Letters 93, 190405 (2004).
  • "Mixtures of bosonic and fermionic atoms in optical lattices",
    Physical Review A 68, 023606 (2003).