3 papers
astro-ph.CO2026
Impact of Scale-dependent Primordial Non-Gaussianity on Scalar-induced Gravitational Waves
Alisha Marriott-Best, Devanshu Sharma, Anish Ghoshal +1
Scalar-induced gravitational waves (SIGWs) probe primordial curvature perturbations beyond cosmic microwave background scales, while primordial black holes (PBHs) probe the rare ta…
astro-ph.CO2025
Robust μ-distortion constraints on primordial supermassive black holes from cubic (gNL) non-Gaussian perturbations
Xavier Pritchard, Christian T. Byrnes, Julien Lesgourgues +1
We make the first calculation of the spectral distortion constraints on the primordial curvature power spectrum in the limit of large cubic non-Gaussianity. This calculation involv…
astro-ph.CO2024
Stochastic inflation and non-perturbative power spectrum beyond slow roll
Devanshu Sharma
Stochastic inflation, together with the formalism, provides a powerful tool for estimating the large-scale behaviour of primordial fluctuations. In this work, we develop a num…