890 citations · 3.3k across the 25 of their papers we have counts for
3 papers · 2 filters
Multi-(super)graviton theory on topologically non-trivial backgrounds
Guido Cognola, Emilio Elizalde, Sergio Zerbini
It is shown that in some multi-supergraviton models, the contributions to the effective potential due to a non-trivial topology can be positive, giving rise in this way to a positi…
One-loop f(R) gravity in de Sitter universe
Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri +2
Motivated by the dark energy issue, the one-loop quantization approach for a family of relativistic cosmological theories is discussed in some detail. Specifically, general …
Dark Energy: Vacuum Fluctuations, the Effective Phantom Phase, and Holography
Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov +1
We aim at the construction of dark energy models without exotic matter but with a phantom-like equation of state (an effective phantom phase). The first model we consider is decayi…