About
Introducing an energy transfer between the inflaton field and a thermal bath modifies the primordial power spectrum $\mathcal{P}_\mathcal{R}$ due to the thermal fluctuations acting as a stochastic source for the curvature perturbations. We propose a fast and accurate method to compute $\mathcal{P}_\mathcal{R}$ in this context based on the Fokker-Planck equation, and verify its consistency with a Montecarlo stochastic approach and a fully analytical approximation. We apply these techniques to two different scenarios: 1. Warm inflation, for which we compute the inflationary CMB observables of several models. We find that some models currently ruled out become compatible with experimental constraints when taking dissipation into account. 2. Inflation with a transient dissipative phase, for which we compute the enhancement in the abundance of asteroid-mass primordial black holes (which are dark matter candidates) and the corresponding peak in the primordial gravitational wave background..
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The talk
Credits and licence
- Institution
- CERN
- Department
- Eucapt Conferences
- Speaker
- Alejandro Perez Rodriguez
- Year
- 2023
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed