Amir Yarahmadi

Department of Physics, Sharif University of Technology

Reheating the Universe after Inflation via Resonant Interactions 

Abstract: The inflation paradigm solves the problems of flatness and homogeneity of the standard cosmological model by considering the exponential expansion for the early universe. It also provides a mechanism for generating density perturbations, which are the core of large-scale structures. One of the successes of inflation is the anticipation of a range of irregular scale perturbations which is well in line with the observations of cosmic background radiation. But after a period of exponential expansion, there will be a cold, empty universe of matter, so there needs to be a process that, after inflation, leads to a hot, standard universe of particles. The two main proposals for achieving standard cosmology are the two theories of warming and hot inflation. In post-inflation reheating theory, considering the coupling between the inflation field and the field as a representative of the standard model field, and considering the effect of the inflation oscillation field, an explosion of particles in the thermal equilibrium can be had. In this study, we examine the effects of producing particles of an extra degree of freedom during and after inflation.

یکشنبه  7 شهریور 1400، ساعت 15:00

Sunday 29 August 2021 – 15:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest