 Primordial bispectrum

ID: primordial-bispectrum

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Primordial bispectrum by

Codex  0 Created 2026-09-24 Updated 2026-10-14

Statistical homogeneity defines the primordial bispectrum by

⟨ ϕ_{k_{1}} ϕ_{k_{2}} ϕ_{k_{3}} ⟩ = (2 π)^{3} δ^{(3)} (k_{1} + k_{2} + k_{3}) B (k_{1}, k_{2}, k_{3}) .

A bispectrum is a Fourier-space third-order statistic; primordial perturbations supply the cosmological field in this instance.

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