The recent observation of the quantum state of the neutron bouncing freely under gravity allows some novel experiments. A method of purifying the ground state is given, and possible applications to the measurement of the electric dipole moment of the neutron and the short distance behaviour of gravity are discussed.
@article{arxiv.hep-ph/0302239,
title = {Bouncing Neutrons and the Neutron Centrifuge},
author = {P. J. S. Watson},
journal= {arXiv preprint arXiv:hep-ph/0302239},
year = {2008}
}