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Attend a 44-minute theoretical physics seminar exploring radiative inflation and dark energy models through non-minimal gravitational coupling. Learn how Venus Keus addresses the challenges of chaotic inflation models that typically predict spectral indices around 0.96 but problematically large tensor-to-scalar ratios of approximately 0.16. Discover how radiative corrections to the potential M²|Φ|² ln(|Φ|²/Λ²) can induce spontaneous symmetry breaking near the scale Λ, creating a Pseudo Nambu-Goldstone boson that functions as a quintessence field in the RIDE (Radiative Inflation and Dark Energy) framework. Examine how incorporating a non-minimal coupling to gravity ξ|Φ|²R² with ξ ∼ 0.1 successfully reduces the tensor-to-scalar ratio to r ≲ 0.03, enabling better alignment with Planck observational data. Explore advanced modifications including small quartic coupling corrections λ|Φ|⁴ that allow the model to fit recent Atacama Cosmology Telescope (ACT) datasets when ξ ∼ 1 and λ ∼ 10⁻⁵, presented as part of the Dublin Institute for Advanced Studies STP Board Meeting series.
