Scale-dependent bias from multiple-field inflation

Abstract

We provide a formula for the scaling behaviour of the inflationary bispectrum in the 'squeezed' limit where one momentum becomes much smaller than the other two. This determines the scaling of the halo bias at low wavenumber and will be an important observable for the next generation of galaxy surveys. Our formula allows it to be predicted for the first time for a generic inflationary model with multiple light, canonically-normalized scalar fields.

5 pages, 1 figure

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Cited by in corpus (12)

• Constraints on primordial non-Gaussianity from 800,000 photometric quasars
• Riding on irrelevant operators
• Constraining the initial conditions of the Universe using large scale structure
• The squeezed limit of the bispectrum in multi-field inflation
• Scale-dependent non-Gaussianity and the CMB Power Asymmetry
• The hemispherical asymmetry from a scale-dependent inflationary bispectrum
• Cosmic Variance of the Spectral Index from Mode Coupling
• The Poisson equation at second order in relativistic cosmology
• Implications of the CMB power asymmetry for the early universe
• Non-Gaussianity in rapid-turn multi-field inflation
• Slow-roll corrections in multi-field inflation: a separate universes approach
• Squeezed bispectrum from multi-field inflation with curved field space metric