Inflationary Slow-Roll & Primordial Power Spectrum

Chaotic φ² (large-field) Starobinsky R² Higgs inflation Natural inflation Chaotic φ⁴ N_e (e-folds) 60 m/M_pl ×10⁻⁵ 1.00 ξ (non-min) 10

n_s = — | r = — | tensor-to-scalar: —

Slow-roll parameters: ε = (M_pl²/2)(V'/V)², η = M_pl²(V''/V). Spectral index: n_s ≈ 1−6ε+2η. Tensor-to-scalar ratio: r ≈ 16ε. Power spectrum: P_s(k) = (V/24π²M_pl⁴ε)·(k/k★)^(n_s−1). Planck 2018: n_s = 0.9649±0.0042, r < 0.056.