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TUE: Tuesday Contributed Sessions

TUE 3: Quantum Field Theory

TUE 3.6: Talk

Tuesday, September 9, 2025, 15:30–15:45, ZHG003

Measurement of the Casimir force during free fall — •Sascha Kulas — International University of Applied Sciences (IU), Hannover, Germany

The Casimir force still has a lot of unknown aspects. Here this force is measured in a tuning fork experiment during free fall and compared with a measurement on ground. It seems like the Casimir force is strongly suppressed during fall. This is a hint that the Casimir force does not have its origin in the Van der Waals force, which would not change in reduced gravity. Independent drop tower experiments have to validate these results. Further conclusions concerning gravity and Dark Energy are raised by establishing a first phenomenological approach based on the measurement results and Verlindes entropic gravity. The main conclusion is that Dark Energy is coupled to baryonic matter.

Keywords: Casimir force; Free fall; Dark Energy; Entropic gravity; Van der Waals force