Seminar: Dynamical system as a powerful tool for the stability analysis of cosmological solutions

Thời gian: 14:00 đến 15:00 Ngày 23/05/2025

Địa điểm: Phòng B102, VIASM, 157 phố Chùa Láng, Hà Nội

Báo cáo viên: PGS.TS. Đỗ Quốc Tuấn (Viện Nghiên cứu tiên tiến PHENIKAA, Đại học PHENIKAA)

Tóm tắt: Studying the stability of cosmological solutions such as inflationary or expanding ones of gravity models is an important task to ensure their cosmological viability. Mathematically, a dynamical system has played a powerful tool for the stability analysis of cosmological solutions. In this talk, we will demonstrate how to construct the corresponding dynamical system for some specific gravity models, including the Ricci- inverse gravity, power-law extensions of the Starobinsky gravity, and Kanno-Soda- Watanabe anisotropic inflation models. Then, we will point out how to investigate the stability of fixed points of these dynamical systems during an inflationary phase.