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7 papers · 2 filters
Existence of solutions to the Lichnerowicz equation: a new proof
Romain Gicquaud
We provide a complete study of existence and uniqueness of solutions to the Lichnerowicz equation in general relativity with arbitrary mean curvature.
Hairy black holes in DHOST theories: Exploring disformal transformation as a solution-generating method
Jibril Ben Achour, Hongguang Liu, Shinji Mukohyama
Solutions-generating methods based on field redefinitions, such as conformal mapping, play an important role in investigating exact solutions in modified gravity. In this work, we…
Effective Dynamics from Coherent State Path Integral of Full Loop Quantum Gravity
Muxin Han, Hongguang Liu
A new routine is proposed to relate Loop Quant Cosmology (LQC) to Loop Quantum Gravity (LQG) from the perspective of effective dynamics. We derive the big-bang singularity resoluti…
Perturbations of a rotating black hole in DHOST theories
Christos Charmousis, Marco Crisostomi, David Langlois +1
We study linear perturbations of a rotating black hole solution that has been recently discovered in degenerate higher-order scalar-tensor (DHOST) theories. We find a parametrizati…
Minimally Modified Gravity: a Hamiltonian Construction
Shinji Mukohyama, Karim Noui
Minimally modified gravity theories are modifications of general relativity with two local gravitational degrees of freedom in four dimensions. Their construction relies on the bre…
Metric formulation of the simple theory of 3d massive gravity
Marc Geiller, Karim Noui
We have recently introduced a new and very simple action for three-dimensional massive gravity. This action is written in a first order formulation where the triad and the connecti…