2 papers
astro-ph.CO2025
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…
astro-ph.CO2025
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…