Remarks on generalized Gauss-Bonnet dark energy

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.063006· OSTI ID:21266356

Alimohammadi, M; Ghalee, A ^[1]

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1. Department of Physics, University of Tehran, North Karegar Avenue, Tehran (Iran, Islamic Republic of)

The modified gravity with F(R,G) Lagrangian, G is the Gauss-Bonnet invariant, is considered. It is shown that the phantom-divide-line crossing and the deceleration to acceleration transition generally occur in these models. Our results coincide with the known results of f(R)-gravity and f(G)-gravity models. The contribution of quantum effects to these transitions is calculated, and it is shown that in some special cases where there are no transitions in classical level, quantum contributions can induce transitions. The quantum effects are described via the account of conformal anomaly.

• OSTI ID: 21266356
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevD.79.063006; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
FIELD THEORIES
GRAVITATION
LAGRANGIAN FUNCTION
NONLUMINOUS MATTER
PHANTOMS
SIMULATION