3 papers
gr-qc2001
The Collapse of Large Extra Dimensions
James Geddes
In models of spacetime that are the product of a four-dimensional spacetime with an ``extra'' dimension, there is the possibility that the extra dimension will collapse to zero siz…
hep-th2001
Classical Stabilization of Homogeneous Extra Dimensions
Sean M. Carroll, James Geddes, Mark B. Hoffman +1
If spacetime possesses extra dimensions of size and curvature radii much larger than the Planck or string scales, the dynamics of these extra dimensions should be governed by class…
astro-ph1995
On the Injection Energy Distibution of Ultra-High-Energy Cosmic Rays
James Geddes, Theodore C. Quinn, Robert M. Wald
We investigate the injection spectrum of ultra-high-energy (>10^{15} eV) cosmic rays under the hypotheses that (1) these cosmic rays are protons and (2) the sources of these cosmic…