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Multi-graviton theory from a discretized RS brane-world and the induced cosmological constant
Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri +2
We propose a multi-graviton theory with non-nearest-neighbor couplings in the theory space. The resulting four-dimensional discrete mass spectrum reflects the structure of a lattic…
The minimal curvature of the universe in modified gravity and conformal anomaly resolution of the instabilities
Shin'ichi Nojiri, Sergei D. Odintsov
We discuss the modified gravity which may produce the current cosmic aceleration of the universe and eliminates the need for dark energy. It is shown that such models where the act…
Born-Infeld Quantum Condensate as Dark Energy in the Universe
Emilio Elizalde, James E. Lidsey, Shinichi Nojiri +1
Some cosmological implications of ultraviolet quantum effects leading to a condensation of Born-Infeld matter are considered. It is shown that under very general conditions the qua…
Modified gravity with terms and cosmic acceleration
Shin'ichi Nojiri, Sergei D. Odintsov
The modified gravity with or terms which grow at small curvature is discussed. It is shown that such a model which has well-defined newtonian limit may e…
Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
Shin'ichi Nojiri, Sergei D. Odintsov
The modified gravity, which eliminates the need for dark energy and which seems to be stable, is considered. The terms with positive powers of the curvature support the inflationar…
Where new gravitational physics comes from: M-theory?
Shin'ichi Nojiri, Sergei D. Odintsov
It is suggested \cite{CDTT} that current cosmic acceleration arises due to modification of General Relativity by the terms with negative powers of curvature. We show that time-depe…