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5 papers · 2 filters
Wormholes supported by hybrid metric-Palatini gravity
Salvatore Capozziello, Tiberiu Harko, Tomi S. Koivisto +2
Recently, a modified theory of gravity was presented, which consists of the superposition of the metric Einstein-Hilbert Lagrangian with an term constructed à la Palati…
Cosmology of hybrid metric-Palatini f(X)-gravity
Salvatore Capozziello, Tiberiu Harko, Tomi S. Koivisto +2
A new class of modified theories of gravity, consisting of the superposition of the metric Einstein-Hilbert Lagrangian with an term constructed à la Palatini was propos…
Cosmology in Palatini theories of gravity
Gonzalo J. Olmo
We discuss recent results on the cosmology of extended theories of gravity formulated in the Palatini approach, i.e., assuming that metric and connection are independent fields. In…
Birkhoff's theorem and perturbations in theories
Gonzalo J. Olmo
Invited contribution to Annalen der Physik (Expert Opinion).
Hawking radiation of massive modes and undulations
Antonin Coutant, Alessandro Fabbri, Renaud Parentani +2
We compute the analogue Hawking radiation for modes which posses a small wave vector perpendicular to the horizon. For low frequencies, the resulting mass term induces a total refl…