| Authors: | Cotsakis S., Kolionis G., Tsokaros A. |
|---|
| Title: | The Initial State of Generalized Radiation Universes |
|---|
| Journal: | Physics Letters B |
|---|
| Volume: | 721 |
|---|
| Number: | 0 |
|---|
| Pages: | 1-6 |
|---|
| Year: | 2013 |
|---|
| Publisher: | Elsevier |
|---|
| To appear: | No |
|---|
| Link: | http://arxiv.org/pdf/1211.5255.pdf |
|---|
| ISI: | Yes |
|---|
| Impact Factor: | 3.955 |
|---|
| File name: | Cotsakis-Kolionis-Tsokaros(2013)_PhysLetB_721_1-6.pdf##^^&&283337844.pdf |
|---|
| Abstract: | We use asymptotic methods to study the early time stability of isotropic and homogeneous solutions
filled with radiation which are close initially to the exact, flat, radiation solution in quadratic lagrangian
theories of gravity. For such models, we analyze all possible modes of approach to the initial singularity
and prove the essential uniqueness and stability of the resulting asymptotic scheme in all cases
except perhaps that of the conformally invariant Bach–Weyl gravity. We also provide a formal series
representation valid near the initial singularity of the general solution of these models and show that
this is dominated at early times by a form in which both curvature and radiation play a subdominant
role. We also discuss the implications of these results for the generic initial state of the theory. |
|---|
Greek