The goal of the group Applied Quantum Interactions (AQI) is the better understanding of quantum mechanical interactions in order to use them efficiently for applications.
The group is closely collaborating with the other groups of the Applied Quantum Systems department.

The AQI group is specialised in the investigation of colour centres in solids. Here, the nitrogen–vacancy (NV) centre in diamond is of particular interest.

Since the quantum mechanical state of an NV centre can be precisely manipulated, it can be used perfectly as a model system to explore quantum physical effects.

The focus of our group is to investigate the interaction between multiple NV centres as well as the interaction to other neighbouring electronic and nuclear spins.

For example, cross-relaxations between spins or Landau–Zener transitions in complex multi-level systems can be studied.

This knowledge can be used, among other things, for the generation of sensitive quantum sensors, for the optimisation of 'gates' in quantum computing, and for the preparation of non-thermodynamic states in magnetic resonance methods (NMR, EPR).

If you are interested in a BSc or MSc thesis project, please directly contact Dr. Ralf Wunderlich.

Selected Publications

turn back

Optically induced cross relaxation via nitrogen-related defects for bulk diamond 13-C hyperpolarization. R. Wunderlich, J. Kohlrautz, B. Abel, J. Haase, J. Meijer. Phys. Rev. B 96, 220407(R) (2017).

DOI
turn back

Robust nuclear hyperpolarization driven by strongly coupled nitrogen vacancy centers. R. Wunderlich, R. Staacke, W. Knolle, B. Abel, J. Haase, J. Meijer. J. Appl. Phys. 130, 104301 (2021).

DOI
turn back

Vacancy diffusion and nitrogen-vacancy center formation near the diamond surface. P. Räcke, L. Pietzonka, J. Meijer, D. Spemann, R. Wunderlich. Appl. Phys. Lett. 118, 204003 (2021).

DOI

Selected Publications

Optically induced cross relaxation via nitrogen-related defects for…

enlarge the image:
enlarge the image:
enlarge the image:
enlarge the image:
enlarge the image:
enlarge the image:
enlarge the image:

Funding

DFG Projects

  • Investigation of Photo-luminescence of NV rich Diamonds for Understanding Interaction with paramagnetic Centers and for quantum based sensor applications
    Read more
  • (A)diabatic passages in solids for nuclear hyperpolarization and optimization on the model system nitrogen-vacancy centers in diamond
    Read more

Team

Dr. Ralf Wunderlich

Dr. Ralf Wunderlich

Academic Staff

Linnéstraße 5, Room 484
04103 Leipzig

Phone: +49 341 97-32706

B. Sc. Alexius Enke

B. Sc. Alexius Enke

Master Student

Linnéstraße 5, Room 481
04103 Leipzig

Telephone: +49 341 97-32707

M. Sc. David Plotzki

M. Sc. David Plotzki

Research Fellow

Linnéstraße 5, Room 484
04103 Leipzig

Phone: +49 341 97-32711

Default Avatar

B. Sc. Fernanda Toledo

Master Student

Linnéstraße 5, Room 484
04103 Leipzig

Telephone: +49 341 97-32711