47 citations · 262 across the 16 of their papers we have counts for
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gr-qc2009★ 47 cited
Various Hamiltonian formulations of f(R) gravity and their canonical relationships
Nathalie Deruelle, Yuuiti Sendouda, Ahmed Youssef
Various Hamiltonian formulations of f(R) gravity can be found in the literature. Some authors follow the Ostrogradsky treatment of higher derivative theories and introduce as extra…
gr-qc2009★ 6 cited
A discrete nonetheless remarkable brick in de Sitter: the "massless minimally coupled field"
Jean-Pierre Gazeau, Ahmed Youssef
Over the last ten years interest in the physics of de Sitter spacetime has been growing very fast. Besides the supposed existence of a "de sitterian period" in inflation theories,…