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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Over the last few years, low- and high-redshift observations set off tensionsin the measurement of the present-day expansion rate $H_0$ and in thedetermination of the amplitude of the matter clustering in the late Universe(parameterized by $S_8$). It was recently noted that both these tensions can beresolved if the cosmological constant parametrizing the dark energy contentswitches its sign at a critical redshift $z_c \sim 2$. However, the anti-deSitter (AdS) swampland conjecture suggests that the postulated switch in signof the cosmological constant at zero temperature seems unlikely because the AdSvacua are an infinite distance appart from de Sitter (dS) vacua in modulispace. We provide an explanation for the required AdS $\to$ dS crossovertransition in the vacuum energy using the Casimir forces of fields inhabitingthe bulk. We then use entropy arguments to claim that any AdS $\to$ dStransition between metastable vacua must be accompanied by a reduction of thespecies scale where gravity becomes strong. We provide a few examplessupporting this AdS $\to$ dS uplift conjecture.

Anti-de Sitter $\to$ de Sitter transition driven by Casimir forces and mitigating tensions in cosmological parameters