Abstract / Description of output
A Friedman cosmology is investigated based on scalar-tensor gravitation with general metric coupling and scalar potential functions. We show that for a broad class of such functions, the scalar field can be dynamically trapped using a recently suggested mechanism. The trapped scalar can drive inflation and accelerated cosmic expansion, compatible with standard requirements. The inflationary phase admits a natural exit with a value of the Hubble parameter dictated by the duration of inflation in a parameter independent manner. For inflationary duration consistent with the GUT description, the resulting Hubble parameter is found to be consistent with its observed value.
Original language | English |
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Pages (from-to) | 3761-3765 |
Number of pages | 5 |
Journal | Physics letters a |
Volume | 380 |
Issue number | 45 |
DOIs | |
Publication status | Published - 25 Nov 2016 |
Keywords / Materials (for Non-textual outputs)
- Cosmic inflation
- Dark energy
- Modified theories of gravity