Prediction of a measurable sign change in the Casimir force using a magnetic fluid
Abstract
We demonstrate quantum levitation controlled by Casimir forces acting between a polystyrene surface and a Teflon-coated metallic substrate immersed in a mixture of toluene and magnetite particles. This system experiences repulsion-attraction transitions in the Casimir interaction for distances where the effect is measurable. This Casimir trapping can be controlled by clever choices of metallic and ferrofluid materials, which are directly linked to the emergence of the trapping effect. Thermal and quantum contributions are investigated in detail, showing how the optical and magnetic properties of the ferrofluid and other materials affect the magnitude of the trapping and its distance range of observability.
Fields of Study & Subjects
Quantum Electrodynamics and Casimir Effect
Advanced Mathematical Theories and Applications
Mechanical and Optical Resonators
Publication details
- Journal / source
- Physical Review Materials
- Publisher
- American Physical Society (APS)
- Volume
- 10
- Issue
- 2
- Publication date
- 11 February 2026
- Language
- EN