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

We address the implementation of the cosmological principle, that is, theassumption of homogeneity and isotropy in the spatial distribution of matter inthe Universe, within the context of Einstein-Cartan theory including minimalcouplings of both Dirac and Maxwell fields to torsion. This theory gives riseto new physical effects in environments of high spin densities while leavingthe vacuum dynamics unaffected. Our approach is to impose the cosmologicalprinciple from the onset to the geometrical degrees of freedom (metric andtorsion functions), which constrains the torsion components and thecorresponding correction terms in the Friedmann-like equations and in theresulting fermionic and bosonic (non-linear) dynamics. We derive thecorresponding cosmological dynamics for the geometrical and matter degrees offreedom and discuss the validity of this approach.

The cosmological principle in theories with torsion: The case of Einstein-Cartan-Dirac-Maxwell gravity