| Description: | [DPS Seminar] Prof. Debaprasad Maity (IIT, Guwahati) -- Gravitational reheating and its cosmological consequences |
| Date: | Wednesday, Sep 21, 2022 |
| Time: | 3 p.m. - 4:30 p.m. |
| Venue: | Meghnad Saha Lecture Theatre |
| Details: | Our present understanding of reheating phase is incomplete due to a lack of observations. Apart from its cosmological implications, the reheating should play a vital role in particle physics and inflation model building. Conventionally reheating dynamics is modelled by invoking arbitrary coupling among the inflaton and daughter fields. Such an approach lacks robust cosmological predictions and is difficult to verify through observation. In this talk, we discuss a reheating scenario where the inflaton decaying through gravitational interaction only can successfully reheat the universe. Besides being successful in reheating the universe, the scenario offers a robust cosmological prediction of the primordial gravitational wave spectrum and discards a large number of possible models of dark matter and inflation that are otherwise consistent with PLANCK. |
| Calendar: | Seminar Calendar (entered by rajni) |