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 present cosmological perturbation theory based on generalized gravitytheories including string theory correction terms and a tachyonic complication.The classical evolution as well as the quantum generation processes in thesevariety of gravity theories are presented in unified forms. These apply both tothe scalar- and tensor-type perturbations. Analyses are made based on thecurvature variable in two different gauge conditions often used in theliterature in Einstein's gravity; these are the curvature variables in thecomoving (or uniform-field) gauge and the zero-shear gauge. Applications togeneralized slow-roll inflations and its consequent power spectra are derivedin unified forms which include wide range of inflationary scenarios based onEinstein's gravity and others.Comment: 24 pages, no figur

Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyons: Unified analyses