Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 41: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)

Q 41.8: Talk

Thursday, March 14, 2024, 12:45–13:00, HS 1098

Magnetic field shielding and rotation stabilisation in the Einstein-Elevator — •Alexander Heidt — Institut für Transport- und Automatisierungstechnik, Hannover, Deutschland

There is an increasing focus on the exploration of space, its potential colonisation and the use of its advantages for fundamental physical research. To make this possible, technologies are required that work in microgravity. The Einstein-Elevator was developed and built out of the motivation to research technologies suitable for space. It is also able to simulate various gravity conditions. Numerous projects from various disciplines are currently being worked on, such as from mechanical engineering to develop new production processes and from physics to carry out basic research into atomic interferometry. One of these is the INTENTAS project, which aims to measure the entanglement of atoms in microgravity. The "spin-exchange collisions" method is used here, whereby weak magnetic field fluctuations can prevent such entanglement of atoms. In order to ensure this entanglement reliably, a magnetic field fluctuation of a few nanotesla is required. For this reason, a magnetic shield was designed as part of the project that suppresses magnetic field fluctuations in the Einstein-Elevator (10 *T) to a few nanotesla. On the other hand, the DESIRE project aims to find evidence of dark energy. However, the setup is sensitive to rotations, so the Einstein-Elevator has been extended with reaction wheels to compensate for any rotations that occur.

Keywords: Microgravity; Magnetic shielding; Rotation stabilisation; Entaglement of Atoms; Dark Energy