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Viable non-singular cosmic bounce in holonomy improved F(R) gravity endowed with a Lagrange multiplier
Emilio Elizalde, S. D. Odintsov, Tanmoy Paul
Matter and quasi-matter bounce scenarios are studied for an F(R) gravity model with holonomy corrections and a Lagrange multiplier, with a scale factor $a(t) = \left(a_0t^2 + 1 \ri…
Wormhole models in gravity
Emilio Elizalde, Martiros Khurshudyan
Models of static wormholes within the extended theory of gravity are investigated and, in particular, the family , w…
Cosmology in a model with Lagrange multiplier, and Gauss-Bonnet and non-minimal kinetic couplings
D. F. Jimenez, L. N. Granda, E. Elizalde
A scalar-tensor model with Gauss-Bonnet and non-minimal kinetic couplings is considered, in which ghost modes are eliminated via a Lagrange multiplier constraint. A reconstruction…
Reconstruction Procedure for Nonlocal Gauss-Bonnet Models
Emilio Elizalde, Ekaterina O. Pozdeeva, Sergey Yu. Vernov
We investigate the cosmological dynamics of nonlocally corrected gravity involving a function of the inverse d'Alembertian acting on the Gauss-Bonnet term. Casting the dynamical eq…
Viscous fluid holographic inflation
E. Elizalde, A. V. Timoshkin
A model of inflation produced by a viscous fluid is investigated and its compatibility with the holographic principle at the very early universe (as recently formulated for the hol…
Cosmological dynamics in gravity with logarithmic trace term
Emilio Elizalde, Nisha Godani, Gauranga C. Samanta
A novel function for modified gravity is proposed, , with constants and , scalar curvature , and the trace of stress energy tensor , satisfyin…