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

One class of single-field inflationary models compatible with therecently-conjectured Swampland criteria would be those in which a Hubbleslow-roll parameter $\epsilon_\text{H}$ is not the same as $\epsilon_\text{V}\sim (V'/V)^2$. However, a roadblock for these models (with a convex potential)lie in the unacceptably high tensor-to-scalar ratio, $r$, generically predictedby them. In this work, illustrating through an explicit example, we point outthat having a non-Bunch-Davies component to the initial state of cosmologicalperturbations makes the value of $r$ compatible with observations. In this way,we lay down a new path even for standard models of slow-roll inflation to beconsistent with the Swampland criteria by invoking deviations from theBunch-Davies initial state.

Avoiding the string swampland in single-field inflation: Excited initial states