136 citations · 359 across the 17 of their papers we have counts for
17 papers
Power Spectrum Emulators from Neural Networks and Tree-Based Methods
Andrei Lazanu
We use two subsets of 2000 and 1000 Quijote simulations to build two power spectrum emulators, allowing for fast computations of the non-linear matter power spectrum. The first emu…
Primordial gravitational waves in DHOST inflation
Philippe Brax, Andrei Lazanu
We consider DHOST inflationary models with a shift symmetry leading to a de Sitter space-time at the background cosmological level. Deviations from scale invariance of the scalar a…
A DHOST model of inflation: CMB constraints from the power spectrum and the bispectrum
Andrei Lazanu
We build an inflationary model based on Degenerate Higher Order Scalar Tensor (DHOST) theories in a de Sitter background. We determine the scale-dependent power spectrum of curvatu…
CMB bispectrum constraints on DHOST inflation
Wuhyun Sohn, Andrei Lazanu, Philippe Brax +1
We present the first direct constraints on a Degenerate Higher Order Scalar Tensor (DHOST) inflation model using the Planck 2018 Cosmic Microwave Background (CMB) results on non-Ga…
Non-Gaussianity in DHOST inflation
Philippe Brax, Andrei Lazanu
DHOST inflation models where deviations from a pure de Sitter background are induced by an axion-like potential can lead to large non-Gaussianities. We investigate the nature of no…
The reach of next-to-leading-order perturbation theory for the matter bispectrum
Davit Alkhanishvili, Cristiano Porciani, Emiliano Sefusatti +4
We provide a comparison between the matter bispectrum derived with different flavours of perturbation theory at next-to-leading order and measurements from an unprecedentedly large…