We study the cosmological evolution of an induced gravity model with a self-interacting scalar field $sigma$ and in the presence of matter and radiation. Such model leads to Einstein Gravity plus a cosmological constant as a stable attractor among homogeneous cosmologies and is therefore a viable dark-energy (DE) model for a wide range of scalar field initial conditions and values for its positive $gamma$ coupling to the Ricci curvature $gamma sigma^{2}R$.
F. Finelli, A. Tronconi, G. Venturi (2008). Dark Energy, Induced Gravity and Broken Scale Invariance. PHYSICS LETTERS. SECTION B, 659, 466-470 [10.1016/j.physletb.2007.11.053].
Dark Energy, Induced Gravity and Broken Scale Invariance
TRONCONI, ALESSANDRO;VENTURI, GIOVANNI
2008
Abstract
We study the cosmological evolution of an induced gravity model with a self-interacting scalar field $sigma$ and in the presence of matter and radiation. Such model leads to Einstein Gravity plus a cosmological constant as a stable attractor among homogeneous cosmologies and is therefore a viable dark-energy (DE) model for a wide range of scalar field initial conditions and values for its positive $gamma$ coupling to the Ricci curvature $gamma sigma^{2}R$.File in questo prodotto:
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