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

Using the Effective Field Theory (EFT) framework of single field inflation,we investigate the possibility of the formation of Primordial Black Holes(PBHs) in the Slow Roll (SR) to Ultra Slow Roll (USR) sharp transition. Wedemonstrate that, due to one-loop correction to the power spectrum, causalityis violated ($c_s>1$) for the mass range of PBHs, $M_{\rm PBH}>10^{2}{\rm gm}$created during the said transition. We find that non-canonical features with$c_s<1$ worsen the predictions of the canonical framework of single-fieldinflation.

PBH formation in EFT of single field inflation with sharp transition