Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-01-17
Lect.Notes Phys. 631 (2003) 355-366
Physics
High Energy Physics
High Energy Physics - Phenomenology
Aspects of Quantum Gravity, ed. by C. Laemmerzahl, Springer, Berlin, Heidelberg 2003, (Lecture notes in physics)
Scientific paper
Quantum states in the Earth's gravitational field can be observed, when ultra-cold neutrons fall under gravity. In an experiment at the Institut Laue-Langevin in Grenoble, neutrons are reflected and trapped in a gravitational cavity above a horizontal mirror. The population of the ground state and the lowest states follows, step by step, the quantum mechanical prediction. An efficient neutron absorber removes the higher, unwanted states. The quantum states probe Newtonian gravity on the micrometer scale and we place limits for gravity-like forces in the range between 1 micron and 10 microns.
Abele Hartmut
Baessler Stefan
Westphal Alexander
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