56 citations · 136 across the 16 of their papers we have counts for
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Disformal Maps: Classification and Singular Dynamics
Mohammad Ali Gorji, Pavel Jiroušek, Alexander Vikman +1
Being agnostic about the field content of a gravitational system, we consider a general disformal transformation of the metric, , on a four-dimensional Lore…
Fragility of stealth solutions in mimetic gravity
Alireza Allahyari, Clarisse Donio, Mohammad Ali Gorji +2
We study a broad class of constrained mimetic-type extensions of general relativity with action , where i…
Abelian and non-Abelian mimetic black holes
Mohammad Ali Gorji, Susmita Jana, Pavel Petrov
We investigate black hole solutions in the mimetic extension of the Einstein-Yang-Mills system, in which the Yang-Mills term is constrained to be constant. In the Abelian U(1) case…
Imperfect dark matter with higher derivatives
Mohammad Ali Gorji
We introduce a higher-derivative action for dark matter whose energy-momentum tensor describes an imperfect fluid with nonzero pressure, energy flux, and anisotropic stress. In the…
Unique gravitational wave signatures of GLPV scalar-tensor theories
Guillem Domènech, Alexander Ganz, Mohammad Ali Gorji +1
We study gravitational waves induced by scalar primordial fluctuations in Gleyzes-Langlois-Piazza-Vernizzi (GLPV), beyond Horndeski, scalar-tensor theories. We uncover, at the leve…
Nonlinear gravitational waves in Horndeski gravity: Scalar pulse and memories
Jibril Ben Achour, Mohammad Ali Gorji, Hugo Roussille
We present and analyze a new non-perturbative radiative solution of Horndeski gravity. This exact solution is constructed by a disformal mapping of a seed solution of the shift-sym…