An oscillating Universe from the linearized R^{2} theory of gravity

Abstract

An oscillating Universe which arises from the linearized R^{2} theory of gravity is discussed, showing that some observative evidences like the cosmological redshift and the Hubble law are in agreement with the model. In this context Dark Energy is seen like a pure curvature effect arising by the Ricci scalar.

To appear in General Relativity and Gravitation DOI: 10.1007/s10714-008-0627-3

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• Cosmic acceleration from modified gravity with Palatini formalism
• On Gravitational Radiation in Quadratic $f(R)$ Gravity
• Eguchi-Hanson like space-times in F(R) gravity
• High-energy scalarons in R^{2} gravity as a model for Dark Matter in galaxies
• A spherically symmetric and stationary universe from a weak modification of general relativity
• (2+1)-dimensional solutions in $F(R)$ gravity
• $F(R)$ gravity in the early Universe: Electroweak phase transition and chameleon mechanism
• Non-singular Cyclic Cosmology without Phantom Menace
• Cosmology of Einstein-Vlasov system in a weak modification of general relativity
• Data Analysis of Massive Gravitational Waves from Gamma Ray Bursts
• Gravitational luminosity of a hot plasma in R^2 gravity
• f(R) Gravity, relic coherent gravitons and optical chaos