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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Here, cosmology of the late and future universe is obtained from$f(R)$-gravity with non-linear curvature terms $R^2$ and $R^3$ ($R$ being theRicci scalar curvature). It is different from $f(R)$-dark enrgy models, wherenon-linear curvature terms are taken as gravitational alternative of darkenergy. In the present model, neither linear nor no-linear curvature terms aretaken as dark energy. Rather, dark energy terms are induced by curvature termsin the Friedmann equation derived from $f(R)$-gravitational equations. It hasadvantage over $f(R)$- dark energy models in the sense that the present modelsatisfies WMAP results and expands as $\sim t^{2/3}$ during matter-dominance.So, it does not have problems due to which $f(R)$-dark energy models arecriticized. Curvature-induced dark energy, obtained here, mimics phantom.Different phases of this model, including acceleration and deceleration duringphantom phase, are investigated here.It is found that expansion of the universewill stop at the age $(3.87 t_0 + 694.4 {\rm kyr})$ ($t_0$ being the presentage of the universe) and after this epoch, it will contract and collapse by thetime $(336.87 t_0 + 694.4 {\rm kyr})$. Further,it is shown that universe willescape predicted collapse (obtained using classical mechanics) on makingquantum gravity corrections relevant near collapse time due to extremely highenergy density and large curvature analogous to the state of very earlyuniverse. Interestingly, cosmological constant is also induced here, which isvery small in classical domain, but very high in quantum domain.

Acceleration and Deceleration in Curvature Induced Phantom Model of the Late and Future Universe, Cosmic Collapse as Well as its Quantum Escape