Renormalization group approach to relativistic cosmology
Renormalization group approach to relativistic cosmology
We discuss the averaging hypothesis tacitly assumed in standard cosmology. Our approach is implemented in a ``3+1'' formalism and invokes the coarse-graining arguments, provided and supported by the real-space renormalization group (RG) methods, in parallel with lattice models of statistical mechanics. Block variables are introduced and the recursion relations written …