Inflationary Butterfly Effect: Nonperturbative Dynamics from Small-Scale Features
A Caravano, K Inomata, S Renaux-Petel - Physical Review Letters, 2024 - APS
For the first time, we investigate the nonperturbative dynamics of single field inflation with a
departure from slow roll. Using simulations, we find that oscillatory features in the potential …
departure from slow roll. Using simulations, we find that oscillatory features in the potential …
The open effective field theory of inflation
A bstract In our quest to understand the generation of cosmological perturbations, we face
two serious obstacles: we do not have direct information about the environment experienced …
two serious obstacles: we do not have direct information about the environment experienced …
On the IR Divergences in de Sitter Space: loops, resummation and the semi-classical wavefunction
S Céspedes, AC Davis, DG Wang - Journal of High Energy Physics, 2024 - Springer
A bstract In this paper, we revisit the infrared (IR) divergences in de Sitter (dS) space using
the wavefunction method, and explicitly explore how the resummation of higher-order loops …
the wavefunction method, and explicitly explore how the resummation of higher-order loops …
Differential equations for cosmological correlators
Cosmological fluctuations retain a memory of the physics that generated them in their spatial
correlations. The strength of correlations varies smoothly as a function of external …
correlations. The strength of correlations varies smoothly as a function of external …
Analytic formulae for inflationary correlators with dynamical mass
S Aoki, T Noumi, F Sano, M Yamaguchi - Journal of High Energy Physics, 2024 - Springer
A bstract Massive fields can imprint unique oscillatory features on primordial correlation
functions or inflationary correlators, which is dubbed the cosmological collider signal. In this …
functions or inflationary correlators, which is dubbed the cosmological collider signal. In this …
The cosmological flow: a systematic approach to primordial correlators
L Pinol, S Renaux-Petel, D Werth - arXiv preprint arXiv:2312.06559, 2023 - arxiv.org
The time evolution of primordial fluctuations conceals a wealth of insights into the high-
energy physics at play during the earliest moments of our Universe, which is ultimately …
energy physics at play during the earliest moments of our Universe, which is ultimately …
Differential equations and recursive solutions for cosmological amplitudes
S He, X Jiang, J Liu, Q Yang, YQ Zhang - Journal of High Energy Physics, 2025 - Springer
A bstract Recently considerable efforts have been devoted to computing cosmological
correlators and the corresponding wavefunction coefficients, as well as understanding their …
correlators and the corresponding wavefunction coefficients, as well as understanding their …
Non-perturbative wavefunction of the universe in inflation with (resonant) features
P Creminelli, S Renaux-Petel, G Tambalo… - Journal of High Energy …, 2024 - Springer
A bstract We study the statistics of scalar perturbations in models of inflation with small and
rapid oscillations in the inflaton potential (resonant non-Gaussianity). We do so by deriving …
rapid oscillations in the inflaton potential (resonant non-Gaussianity). We do so by deriving …
Cosmological Correlators at the Loop Level
Z Qin - arXiv preprint arXiv:2411.13636, 2024 - arxiv.org
Cosmological correlators encode rich information about physics at the Hubble scale and
may exhibit characteristic oscillatory signals due to the exchange of massive particles …
may exhibit characteristic oscillatory signals due to the exchange of massive particles …
Dispersive Bootstrap of Massive Inflation Correlators
H Liu, Z Qin, ZZ Xianyu - arXiv preprint arXiv:2407.12299, 2024 - arxiv.org
Inflation correlators with massive exchanges are central observables of cosmological
collider physics, and are also important theoretical data for us to better understand quantum …
collider physics, and are also important theoretical data for us to better understand quantum …