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/

Global: Zendy Plus annual

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

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

If the spatial sections of the Universe are positively curved, extrapolatingthe inflationary stage backward in time inevitably leads to a classical bounce.This simple scenario, non-singular and free of exotic physics, deserves to beinvestigated in details. The background dynamics exhibits interesting featuresand is shown to be mostly insensitive to initial conditions as long asobservational consequences are considered. The primordial scalar power spectrumis explicitly computed, for different inflaton potentials, and the subsequentCMB temperature anisotropies are calculated. The results are compatible withcurrent measurements. Some deviations with respect to the standard paradigm canhowever appear at large scales and we carefully disentangle what is associatedwith the vacuum choice with what is more fundamentally due to the bounceitself.

Detailed analysis of the curvature bounce: background dynamics and imprints in the CMB