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Task Group | High Precision Modelling

Network of an optical resonator. Image: Claus Lämmerzahl

In many cases, the experimental accuracy which can be achieved requires precise knowledge of the apparatus used and the effects influencing the measurements. Sometimes influences on the measurement cannot be shielded out and, thus, have to be modelled very precisely. In experiments with lasers, for example, lenses and mirrors will be heated leading to distortions of the material, which obviously will influence the experimental result.

Optimization of the experimental design as well as determination of the dominant influences on the experimental outcome can be achieved only through thorough precise modelling of the whole apparatus. A required modelling accuracy of 10-20 is derived based on the accuracy of existing clocks and resonators. The modelling takes into account mechanically and thermally induced stresses and deformations, thermal conduction, the influence of external radiation and mechanical forces as well as the calculation of electromagnetic fields. The results are of importance for the development of optical clocks, or for laser and atomic interferometry, which will be applied, for example, in the space mission LISA (Laser Interferometer Space Antenna) or in satellite based geodesy missions.

A further area of activity which is very near to the idea of Quantum Engineering is high precision quantum modelling. One task is the precise numerical calculation of ground states and the dynamics of quantum fields, e.g. Bose-Einstein condensates, under various boundary conditions and time dependent external influences. Such numerical modelling is important for the design of future quantum experiments as well as for estimating the expected effects. One future task is modelling of the coupling of quantum systems to classical systems.

Involved research areas and institutes

  • Research Area Quantum Sensors
  • Research Area Space-Time
  • Reaserach Area Enabling Technologies
  • Centre of Applied Space Technology and Microgravity, Bremen
  • Institut für Angewandte Mathematik, Hannover
  • Physikalisch-Technische Bundesanstalt, Braunschweig
  • Institute for Quantum Optics, Hannover
  • Albert-Einstein-Institut, Hannover
  • Institut für Erdmessung, Hannover