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/

Zendy Plus

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

Zendy Tools

Zendy Open

Arbitrary generalization to the teleparallel equivalent of general relativityloses local Lorentz invariance to reparametrize the orthonormal coordinatesystem and gives rise to asymmetry field equations. We investigate consequencesof local Lorentz violation to primordial fluctuations in extended single fieldinflationary models based on the scalar-tensor formulation of the torsionscalar $T$ that effectively includes $f(T)$ gravity as a special case. We showthat despite some asymmetry part of the field equations are removed in aspatially homogeneous and isotropic cosmic background, no subhorizonscalar-perturbation mode can survive by the time of horizon crossing. As aresult, any scalar field mediated in torsion cannot generate enough primordialdensity inhomogeneity alone, even if it brings some de Sitter backgroundsolutions in generalized teleparallel gravity.

Inflation with teleparallelism: Can torsion generate primordial fluctuations without local Lorentz symmetry?