In the GRASIAN collaboration we pursue research with the lightest neutral particles/atoms at lowest kinetic energies, nearly at rest. Subject of our work are hydrogen and antihydrogen, neutrons, muonium and positronium. Their quantum properties in the field of gravity, Casimir-Polder and Van-der-Waals potentials, precise optical and microwave spectroscopy are in the focus of our collaboration. GRASIAN combines experimental and theoretical activities of several groups and institutions:
- Institut Laue Langevin (ILL Grenoble): V. Nesviszhevsky
- Laboratoire Kastler Brossel (LKB Paris): F. Nez, S. Reynaud, P. Yzombard
- Stefan Meyer Institute (SMI Vienna): E. Widmann
- University of Turku (UTU Turku): S. Vasiliev
- Eidgenössische Technische Hochschule (ETH Zürich): P. Crivelli
- Lebedev Physical Institute (FIAN Moscow): A. Golovizin, A. Voronin
(participation temporarily suspended)
We address several major questions of fundamental physics
• Short range fundamental forces caused by dark matter, extra dimension, new light bosons, dark energy
• CPT and Lorentz invariance violation
• Quantum Electrodynamics (most precise theory)