Mohammad Amin Hejazi

Department of Physics, Sharif University of Technology

Periodic step-like features in the inflationary potential

Abstract: Primordial black holes (PBH) are at the forefront of theoretical cosmology since they can explain dark matter, gravitational waves, and more. The enhanced power spectrum of small scales can result in the production of primordial black holes that could be dark matter candidates. In this talk, we discuss step-like features of the inflationary potential resulting in an increase in the power spectrum of curvature perturbations by several orders of magnitude. As part of this research, we apply a number of these features at the same distances periodically in the inflationary slow-roll potential. Furthermore, we apply the floquet theory to better understand how these features optimize power spectrum enhancements. Finally, we estimate the floquet exponent using both analytical and numerical methods in different ranges of feature parameters.

یکشنبه 17 مرداد 1400، ساعت 19:00

Sunday 8 August 2021 – 19:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

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

گزینه ورود به صورت مهمان – Enter as a Guest