333 citations · 821 across the 19 of their papers we have counts for
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gr-qc2018★ 81 cited
Hairy Schwarzschild-(A)dS black hole solutions in DHOST theories beyond shift symmetry
Jibril Ben Achour, Hongguang Liu
We derive the general conditions for a large family of shift symmetry breaking degenerate higher order scalar-tensor (DHOST) theories to admit stealth black hole solutions. Such bl…
gr-qc2018★ 29 cited
Polymer Quantum Cosmology: Lifting quantization ambiguities using a conformal symmetry
Jibril Ben Achour, Etera R. Livine
In this letter, we stress that the simplest cosmological model consisting in a massless scalar field minimally coupled to homogeneous and isotropic gravity has an in-built $\SL(2,\…
gr-qc2018★ 91 cited
Polymer Schwarzschild black hole: An effective metric
Jibril Ben Achour, Frédéric Lamy, Hongguang Liu +1
We consider the modified Einstein equations obtained in the framework of effective spherically symmetric polymer models inspired by Loop Quantum Gravity. When one takes into accoun…