Features and new physical scales in primordial observables: theory and observation

J Chluba, J Hamann, SP Patil - International Journal of Modern …, 2015 - World Scientific
All cosmological observations to date are consistent with adiabatic, Gaussian and nearly
scale invariant initial conditions. These findings provide strong evidence for a particular …

Amplitudes meet cosmology: A (scalar) primer

P Benincasa - International Journal of Modern Physics A, 2022 - World Scientific
Here, we review the most recent progress in our understanding of quantum mechanical
observables in cosmology in the perturbative regime. It relies on an approach that considers …

Snowmass white paper: the cosmological bootstrap

D Baumann, D Green, A Joyce, E Pajer… - SciPost Physics …, 2024 - scipost.org
This white paper summarizes recent progress in the cosmological bootstrap, an approach to
the study of the statistics of primordial fluctuations from consistency with unitarity, locality and …

Quantum loop effects on the power spectrum and constraints on primordial black holes

S Choudhury, S Panda, M Sami - Journal of Cosmology and …, 2023 - iopscience.iop.org
We present a detailed exposition on the prospects of the formation of Primordial Black Holes
(PBHs) during Slow Roll (SR) to Ultra Slow Roll (USR) sharp transitions in the framework of …

Squeezed bispectrum and one-loop corrections in transient constant-roll inflation

H Motohashi, Y Tada - Journal of Cosmology and Astroparticle …, 2023 - iopscience.iop.org
In canonical single-field inflation, the production of primordial black holes (PBH) requires a
transient violation of the slow-roll condition. The transient ultra slow-roll inflation is an …

Galileon inflation evades the no-go for PBH formation in the single-field framework

S Choudhury, S Panda, M Sami - Journal of Cosmology and …, 2023 - iopscience.iop.org
We consider Galileon inflation in the Effective Field Theory (EFT) framework and examine
the possibility for PBH formation during slow roll (SR) to ultra slow roll (USR) transitions. We …

No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation

S Choudhury, MR Gangopadhyay, M Sami - The European Physical …, 2024 - Springer
We examine the possibility of Primordial Black Holes (PBHs) formation in single field models
of inflation. Using the adiabatic or wave function renormalization scheme in the short range …

The cosmological optical theorem

H Goodhew, S Jazayeri, E Pajer - Journal of Cosmology and …, 2021 - iopscience.iop.org
The unitarity of time evolution, or colloquially the conservation of probability, sits at the heart
of our descriptions of fundamental interactions via quantum field theory. The implications of …

Cosmological cutting rules

S Melville, E Pajer - Journal of High Energy Physics, 2021 - Springer
A bstract Primordial perturbations in our universe are believed to have a quantum origin,
and can be described by the wavefunction of the universe (or equivalently, cosmological …

The effective field theory of cosmological large scale structures

JJM Carrasco, MP Hertzberg, L Senatore - Journal of High Energy Physics, 2012 - Springer
A bstract Large scale structure surveys will likely become the next leading cosmological
probe. In our universe, matter perturbations are large on short distances and small at long …