https://doi.org/10.1140/epjc/s10052-017-5028-x
Regular Article - Theoretical Physics
Warm inflation with an oscillatory inflaton in the non-minimal kinetic coupling model
1
Department of Science, University of Ayatollah Ozma Borujerdi, Boroujerd, Iran
2
Department of Physics, University of Tehran, Tehran, Iran
* e-mail: mohsenisad@ut.ac.ir
Received:
12
February
2017
Accepted:
26
June
2017
Published online:
12
July
2017
In the cold inflation scenario, the slow roll inflation and reheating via coherent rapid oscillation, are usually considered as two distinct eras. When the slow roll ends, a rapid oscillation phase begins and the inflaton decays to relativistic particles reheating the Universe. In another model dubbed warm inflation, the rapid oscillation phase is suppressed, and we are left with only a slow roll period during which the reheating occurs. Instead, in this paper, we propose a new picture for inflation in which the slow roll era is suppressed and only the rapid oscillation phase exists. Radiation generation during this era is taken into account, so we have warm inflation with an oscillatory inflaton. To provide enough e-folds, we employ the non-minimal derivative coupling model. We study the cosmological perturbations and compute the temperature at the end of warm oscillatory inflation.
© The Author(s), 2017
