135 citations · 288 across the 6 of their papers we have counts for
6 papers
Off-shell duality invariance of Schwarzschild perturbation theory
Adam R. Solomon
We explore the duality invariance of the Maxwell and linearized Einstein-Hilbert actions on a non-rotating black hole background. On shell these symmetries are electric-magnetic du…
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…
Solitons in generalized galileon theories
Mariana Carrillo-Gonzalez, Ali Masoumi, Adam R. Solomon +1
We consider the existence and stability of solitons in generalized galileons, scalar field theories with higher-derivative interactions but second-order equations of motion. It has…
Integrated Sachs-Wolfe effect in massive bigravity
Jonas Enander, Yashar Akrami, Edvard Mortsell +2
We study the integrated Sachs-Wolfe (ISW) effect in ghost-free, massive bigravity. We focus on the infinite-branch bigravity (IBB) model which exhibits viable cosmic expansion hist…
Cosmic expansion histories in massive bigravity with symmetric matter coupling
Jonas Enander, Adam R. Solomon, Yashar Akrami +1
We study the cosmic expansion history of massive bigravity with a viable matter coupling which treats both metrics on equal footing. We derive the Friedmann equation for the effect…
Stable and unstable cosmological models in bimetric massive gravity
Frank Könnig, Yashar Akrami, Luca Amendola +2
Nonlinear, ghost-free massive gravity has two tensor fields; when both are dynamical, the mass of the graviton can lead to cosmic acceleration that agrees with background data, eve…