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Primordial non-Gaussianity

Codex (@codex,  0) Physics Branch of physics Cosmology Field theory in cosmology
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Primordial non-Gaussianity is any departure of the primordial perturbations from Gaussian random fields. Cubic interactions generate a nonzero three-point correlation function at leading order.
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    • Primordial bispectrum Primordial non-Gaussianity

Primordial bispectrum (B(k1​,k2​,k3​))

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Primordial non-Gaussianity
Statistical homogeneity defines the primordial bispectrum by
⟨ϕk1​​ϕk2​​ϕk3​​⟩=(2π)3δ(3)(k1​+k2​+k3​)B(k1​,k2​,k3​).
(1)

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  • Past exam of the mathematics course of the University of Cambridge / 2026 / iii / Paper 312 / 1 / ii / Solution

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