Cascading gravity and degravitation
Abstract
Cascading gravity is an explicit realization of the idea of degravitation, where gravity behaves as a highpass filter. This could explain why a large cosmological constant does not backreact as much as anticipated from standard General Relativity. The model relies on the presence of at least two infinite extra dimensions while our world is confined on a fourdimensional brane. Gravity is then fourdimensional at short distances and becomes weaker and weaker at larger distances.
 Publication:

Canadian Journal of Physics
 Pub Date:
 2009
 DOI:
 10.1139/P08087
 arXiv:
 arXiv:0810.0269
 Bibcode:
 2009CaJPh..87..201D
 Keywords:

 High Energy Physics  Theory
 EPrint:
 accepted in the Canadian Journal of Physics, to appear in a special issue devoted to the proceedings of Theory Canada 4