Astronomy
Stretching a tiny patch of the Universe
Increase the number of e-folds. Compare exponential expansion with a shrinking comoving Hubble radius and follow a perturbation as it crosses that scale.
The model and its limits
Constant-H inflation kinematics and a prescribed primordial power law. No inflaton potential, reheating or quantum-field evolution is solved. The grid and horizon use logarithmic size mappings; fluctuation heights and colours are highly amplified.
Equations used in the module
Equations a/a₀ = exp(N); (aH)⁻¹ ∝ exp(−N); curvature ∝ exp(−2N); P(k) = A_s(k/k₀)^(n_s−1).
