Modified teleparallel gravity: Inflation without an inflaton
The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first d...
Guardado en:
| Autores principales: | , |
|---|---|
| Publicado: |
2007
|
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v75_n8_p_Ferraro http://hdl.handle.net/20.500.12110/paper_15507998_v75_n8_p_Ferraro |
| Aporte de: |
| Sumario: | The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first derivatives of the vierbein. We show that the Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat Friedmann-Robertson-Walker (FRW) universe by providing an initial exponential expansion without resorting to an inflaton field. © 2007 The American Physical Society. |
|---|