FYI: Some papers of interest. but I don't have access to these journals.
Perhaps preprints are at arXiv? Exotic physics with slow neutrons W. Michael Snow http://www.physicstoday.org/resource/1/phtoad/v66/i3/p50_s1 "Sensitive experiments with low-energy neutrons are helping to unravel mysteries of cosmology, gravitation, and the standard model of particle physics." Back to the beginning of quantum spacetime Martin Bojowald http://www.physicstoday.org/resource/1/phtoad/v66/i3/p35_s1 "In loop quantum gravity, spacetime emerges from excitations of an ultimate vacuum." -Mark Iverson
