Vanishing Cosmological Constant in Modified Gauss-Bonnet Gravity with Conformal Anomaly

Abstract

We consider dark energy cosmology in a de Sitter universe filled with quantum conformal matter. Our model represents a Gauss-Bonnet model of gravity with contributions from quantum effects. To the General Relativity action an arbitrary function of the GB invariant, f(G), is added, and taking into account quantum effects from matter the cosmological constant is studied. For the considered model the conditions for a vanishing cosmological constant are considered. Creation of a de Sitter universe by quantum effects in a GB modified gravity is discussed.

8 pages latex, 1 figure. To appear in Int. J. Mod. Phys. D

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Cited by in corpus (5)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Gauss-Bonnet lagrangian G ln G and cosmological exact solutions
• Homogeneous cosmologies in generalized modified gravity
• Effect of the Trace Anomaly on the Cosmological Constant
• Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models