Frozen Rigging Model of the Energy Dominated Universe |
| |
Authors: | randon Carter |
| |
Institution: | (1) LuTh, Observatoire de Paris, 92, Meudon, 92195, France |
| |
Abstract: | Composite rigging systems, involving membranes that meet on strings that meet on monopoles, arise naturally by the Kibble
mechanism as topological defects in field theories involving spontaneous symmetry breaking. Such systems will tend to freeze
out into static lattice type configurations with energy contribution ultimately be provided by the membranes. It has been
suggested by Bucher and Spergel that on scales large compared with the relevant (interstellar separation) distance characterizing
the relevant mesh length, such a system may behave as a rigidity-stabilized solid, having an approximately isotropic stress
energy tensor with negative pressure, as given by a polytropic index γ = w+1 = 1/3. It has recently been shown that such a system can be rigid enough to be stable if the number of membranes meeting
at a junction is even (though not if it is odd). Using as examples an approximaely O(3) symmetric scalar field model that
can provide an “8-color” (body-centered) cubic lattice, and an approximate U(1)× U(1) model offering a disordered “5-color” lattice, it is argued that such a mechanism can account naturally for the observed
dark energy dominance of the universe, without ad hoc assumptions, other than that the relevant symmetry breaking phase transition
should have occurred somewhere about the Kev energy range. |
| |
Keywords: | cosmology elasticity |
本文献已被 SpringerLink 等数据库收录! |
|