Laboratoire Collisions Agrégats Réactivité - UMR5589

10 avril 2025: 1 événement

séminaire

• The Hannover Very Long Baseline Atom Interferometry facility

  Jeudi 10 avril 11:00-12:00 - Dennis Schlippert - Leibniz University Hannover, Institute of Quantum Optics

  The Hannover Very Long Baseline Atom Interferometry facility

  Résumé : Very Long Baseline Atom Interferometry (VLBAI) enables ground-based atomic matter-wave interferometry on large scales in space and time. With shot noise-limited instabilities better than 10^−9 m/s^2 at 1 s at the horizon, the Hannover VLBAI facility may compete with state-of-the-art superconducting gravimeters, while providing absolute instead of relative gravity measurements thanks to a high-performance seismic attenuation system. Operated with rubidium and ytterbium simultaneously, tests of the universality of free fall at a level of parts in 10^13 and beyond are in reach. Finally, the large spatial extent of the interferometer allows one to probe the limits of coherence at macroscopic scales as well as the interplay of quantum mechanics and gravity.
  We report on the status of and first results obtained with our 1e6 atoms all-optical rubidium BEC source in the VLBAI facility which commenced operation in late 2024. We moreover discuss prospects of scalable matter-wave array interferometery for in-situ beam sensing and the commissioning of our seismic attenuation system.

  Lieu : Salle de conférence, Bâtiment 3R4
  En savoir plus : The Hannover Very Long Baseline Atom Interferometry facility