English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We study the multifield inflationary models where the cosmologicalperturbation is sourced by light scalar fields other than the inflaton. Weexploit the operator product expansion and partly the symmetries present duringthe de Sitter epoch to characterize the non-Gaussian four-point correlator inthe squeezed limit. We point out that the contribution to it from the intrinsicnon-Gaussianity of the light fields at horizon crossing can be larger than theusually studied contribution arising on superhorizon scales and it comes with adifferent shape. Our findings indicate that particular attention needs to betaken when studying the effects of the primordial NG on real observables, suchas the clustering of dark matter halos.

The Four-point Correlator in Multifield Inflation, the Operator Product Expansion and the Symmetries of de Sitter