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Dark Energy and Cosmic Speed-Up from Consistent Modified Gravity
Shin'ichi Nojiri, Sergei D. Odintsov
We review some modified gravity models which describe the gravitational dark energy and the possibility of cosmic speed-up. The new consistent version of such theory which contains…
Is brane cosmology predictable?
Shin'ichi Nojiri, Sergei D. Odintsov
The creation of the inflationary brane universe in 5d bulk Einstein and Einstein-Gauss-Bonnet gravity is considered. We demonstrate that emerging universe is ambigious due to arbit…
Quantum escape of sudden future singularity
Shin'ichi Nojiri, Sergei D. Odintsov
We consider finite-time, future (sudden or Big Rip type) singularities which may occur even when strong energy condition is not violated but equation of state parameter is time-dep…
Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov
We consider late-time cosmology in a (phantom) scalar-tensor theory with an exponential potential, as a dark energy model with equation of state parameter close to -1 (a bit above…
Multisupergravity from latticized extra dimension
Shin'ichi Nojiri, Sergei D. Odintsov
The construction of the linearized four-dimensional multisupergravity from five-dimensional linearized supergravity with discretized fifth dimension is presented. The one-loop vacu…
Gravity assisted dark energy dominance and cosmic acceleration
Shin'ichi Nojiri, Sergei D. Odintsov
It is proposed that dark energy may become dominant over standard matter due to universe expansion (curvature decrease). Two models: non-linear gravity-matter system and modified g…