40 citations · 234 across the 11 of their papers we have counts for
5 papers · 1 filter
Quantum Gravity inspired nonlocal gravity model
Luca Amendola, Nicolo Burzilla, Henrik Nersisyan
We consider a nonlocal gravity model motivated by nonperturbative Quantum Gravity studies. This model, if correct, suggests the existence of strong IR relevant effects which can le…
Instabilities in tensorial nonlocal gravity
Henrik Nersisyan, Yashar Akrami, Luca Amendola +3
We discuss the cosmological implications of nonlocal modifications of general relativity containing tensorial structures. Assuming the presence of standard radiation- and matter-do…
Dynamical analysis of cosmology: Impact of initial conditions and constraints from supernovae
Henrik Nersisyan, Yashar Akrami, Luca Amendola +2
We discuss the cosmological implications of the nonlocal modification to standard gravity. We relax the assumption of special initial conditions in the local formula…
A spectre is haunting the cosmos: Quantum stability of massive gravity with ghosts
Frank Könnig, Henrik Nersisyan, Yashar Akrami +2
Many theories of modified gravity with higher order derivatives are usually ignored because of serious problems that appear due to an additional ghost degree of freedom. Most dange…
Consistent metric combinations in cosmology of massive bigravity
Henrik Nersisyan, Yashar Akrami, Luca Amendola
Massive bigravity models are interesting alternatives to standard cosmology. In most cases, however, these models have been studied for a simplified scenario in which both metrics…