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 propose to study the accelerating expansion of the universe in the doublecomplex symmetric gravitational theory (DCSGT). The universe we live in istaken as the real part of the whole spacetime ${\cal M}^4_C(J)$ which is doublecomplex. By introducing the spatially flat FRW metric, not only the doubleFriedmann Equations but also the two constraint conditions $p_J=0$ and $J^2=1$are obtained. Furthermore, using parametric $D_L(z)$ ansatz, we reconstruct the$\omega^{'}(z)$ and $V(\phi)$ for dark energy from real observational data. Wefind that in the two cases of $J=i,p_J=0$ and $J=\epsilon,p_J\neq 0$, thecorresponding equations of state $\omega^{'}(z)$ remain close to -1 at present($z=0$) and change from below -1 to above -1. The results illustrate that thewhole spacetime, i.e. the double complex spacetime ${\cal M}^4_C(J)$, may beeither ordinary complex ($J=i,p_J=0$) or hyperbolic complex($J=\epsilon,p_J\neq 0$). And the fate of the universe would be Big Rip in thefuture.Comment: 5 pages, 5 figures, accepted by Commun. Theor. Phy

Reconstructing Equation of State for Dark Energy in Double Complex Symmetric Gravitational Theory