Please use this identifier to cite or link to this item:
https://hdl.handle.net/1822/33733| Title: | Dynamics of Robertson-Walker spacetimes with diffusion |
| Author(s): | Alho, Artur Calogero, Simone Carmelo Ramos, M. P. Machado Soares, A. J. |
| Keywords: | Cosmology Diffusion Scalar field Dynamical systems |
| Issue date: | Mar-2015 |
| Publisher: | Elsevier |
| Journal: | Annals of Physics |
| Abstract(s): | We study the dynamics of spatially homogeneous and isotropic spacetimes containing a fluid undergoing microscopic velocity diffusion in a cosmological scalar field. After deriving a few exact solutions of the equations, we continue by analyzing the qualitative behavior of general solutions. To this purpose we recast the equations in the form of a two dimensional dynamical system and perform a global analysis of the flow. Among the admissible behaviors, we find solutions that are asymptotically de-Sitter both in the past and future time directions and which undergo accelerated expansion at all times. |
| Type: | Article |
| URI: | https://hdl.handle.net/1822/33733 |
| DOI: | 10.1016/j.aop.2015.01.010 |
| ISSN: | 0003-4916 |
| Publisher version: | The on-line publication is available at www.sciencedirect.com/science/article/pii/S0003491615000135# |
| Peer-Reviewed: | yes |
| Access: | Open access |
| Appears in Collections: |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Dyn_RW_SpacTimes_Diffusion_2Jan2015.pdf | Versão dos autores para a publicação. | 392,69 kB | Adobe PDF | View/Open |
