| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10724664 | Physics Letters B | 2013 | 6 Pages |
Abstract
We parameterize the evolutions of the slow expansion, which emerges from a static state in infinite past, into different classes. We show that the scale invariant adiabatical perturbation may be generated during these evolutions, and the corresponding evolutions can be realized with generalized Galileon Lagrangians, in which there is not the ghost instability.
Related Topics
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Authors
Zhi-Guo Liu, Yun-Song Piao,