24 citations · 82 across the 8 of their papers we have counts for
8 papers · 1 filter
A bigravity model from noncommutative geometry
Marco de Cesare, Mairi Sakellariadou, Araceli Soler Oficial
Noncommutative gravity, based on a twist-deformation of the differential geometry of spacetime and a first-order formulation of the dynamics, requires additional gravitational degr…
Multiple-scale analysis of modified gravitational-wave propagation
Marco de Cesare, Mairi Sakellariadou, Benjamin Sutton
We employ multiple-scale analysis to systematically derive analytical approximations describing the cosmological propagation of gravitational waves beyond general relativity, in a…
Dipolar perturbations of nonbidiagonal black holes in bigravity
David Brizuela, Marco de Cesare, Araceli Soler Oficial
In bimetric gravity, nonbidiagonal solutions describing a static, spherically symmetric, and asymptotically flat black hole are given by a pair of Schwarzschild geometries, one in…
Physical Hamiltonian for mimetic gravity
Marco de Cesare, Viqar Husain
Starting from a local action for mimetic gravity that includes higher derivatives of a scalar field , we derive a gauge-fixed canonical action of the theory in the ADM canonical…
The singularity in mimetic Kantowski-Sachs cosmology
Marco de Cesare, Sanjeev S. Seahra, Edward Wilson-Ewing
The dynamics of the vacuum Kantowski-Sachs space-time are studied in the so-called limiting curvature mimetic gravity theory. It is shown that in this theory the vacuum Kantowski-S…
A generalized Kasner transition for bouncing Bianchi I models in modified gravity theories
Marco de Cesare, Edward Wilson-Ewing
We derive transition rules for Kasner exponents in bouncing Bianchi I models with generic perfect fluid matter fields for a broad class of modified gravity theories where cosmologi…
Reconstruction of mimetic gravity in a non-singular bouncing universe from quantum gravity
Marco de Cesare
We illustrate a general reconstruction procedure for mimetic gravity. Focusing on a bouncing cosmological background, we derive general properties that must be satisfied by the fun…
Noncommutative gravity with self-dual variables
Marco de Cesare, Mairi Sakellariadou, Patrizia Vitale
We build a noncommutative extension of Palatini-Holst theory on a twist-deformed spacetime, generalizing a model that has been previously proposed by Aschieri and Castellani. The t…