2025/05/07 by Daniel Müller, Muller, Daniel, A. V. Toporensky +1
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Mathematical and Theoretical Analysis
paper · pdf · doi:10.48550/arxiv.2505.04805
openalex publication_date 2025/05/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider initial conditions leading to Starobinsky inflation in the general quadratic gravity, where the action of the theory contains one more curvature square invariant in addition to R2. We have chosen corresponding coefficients in a way so that the inflationary solution keeps to be stable. Our numerical results show that despite the configuration of initial conditions in the (H,R) plane, leading to Starobinsky inflation can change considerably from the R2 theory, realization of inflation does not need a fine-tuning of the initial conditions.