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CMB spectra and bispectra calculations: making the flat-sky approximation rigorous
Francis Bernardeau, Cyril Pitrou, Jean-Philippe Uzan
This article constructs flat-sky approximations in a controlled way in the context of the cosmic microwave background observations for the computation of both spectra and bispectra…
Density fields and halo mass functions in the Geometrical Adhesion toy Model
Patrick Valageas, Francis Bernardeau
In dimension 2 and above, the Burgers dynamics, the so-called "adhesion model" in cosmology, can actually give rise to several dynamics in the inviscid limit. We investigate here t…
Multi-Point Propagators for Non-Gaussian Initial Conditions
Francis Bernardeau, Martin Crocce, Emiliano Sefusatti
We show here how Renormalized Perturbation Theory (RPT) calculations applied to the quasi-linear growth of the large-scale structure can be carried on in presence of primordial non…
Gravity and non-gravity mediated couplings in multiple-field inflation
Francis Bernardeau
Mechanisms for the generation of primordial non-Gaussian metric fluctuations in the context of multiple-field inflation are reviewed. As long as kinetic terms remain canonical, it…
Mode coupling evolution in arbitrary inflationary backgrounds
Francis Bernardeau
The evolution of high order correlation functions of a test scalar field in arbitrary inflationary backgrounds is computed. Whenever possible, exact results are derived from quantu…
The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations
Cyril Pitrou, Jean-Philippe Uzan, Francis Bernardeau
This article presents the first computation of the complete bispectrum of the cosmic microwave background temperature anisotropies arising from the evolution of all cosmic fluids u…