Modified teleparallel gravity: Inflation without an inflaton
Rafael FerraroDepartamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, ArgentinaFranco FioriniInstituto de Astronomía y Física del Espacio, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina
2007en
ABI
Annotatsiya
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.
Identifikatorlar
Iqtiboslar va manbalar
24 ta iqtibos0 ta foydalanilgan manba
Koʻrsatkichlar — AkademScholar · Tez orada