String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.086002· OSTI ID:21020435

Cognola, Guido; Zerbini, Sergio ^[1]; Elizalde, Emilio ^[2]; Nojiri, Shin'ichi ^[3]; Odintsov, Sergei D ^[4]

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1. Dipartimento di Fisica, Universita di Trento and Istituto Nazionale di Fisica Nucleare Gruppo Collegato di Trento (Italy)
2. Consejo Superior de Investigaciones Cientificas (ICE/CSIC) and Institut d'Estudis Espacials de Catalunya (IEEC) Campus UAB, Facultat de Ciencies, Torre C5-Par-2a pl E-08193 Bellaterra, Barcelona (Spain)
3. Department of Physics Nagoya University, Nagoya 464-8602 (Japan)
4. Consejo Superior de Investigaciones Cientificas (ICE/CSIC) and Institut d'Estudis Espacials de Catalunya (IEEC) Campus UAB, Facultat de Ciencies, Torre C5-Par-2a pl E-08193 Bellaterra, Barcelona Spain (Spain)

We consider scalar-Gauss-Bonnet and modified Gauss-Bonnet gravities and reconstruct these theories from the universe expansion history. In particular, we are able to construct versions of those theories (with and without ordinary matter), in which the matter-dominated era makes a transition to the cosmic acceleration epoch. In several of the cases under consideration, matter dominance and the deceleration-acceleration transition occur in the presence of matter only. The late-time acceleration epoch is described asymptotically by de Sitter space but may also correspond to an exact {lambda}CDM cosmology, having in both cases an effective equation of state parameter w close to -1. The one-loop effective action of modified Gauss-Bonnet gravity on the de Sitter background is evaluated and it is used to derive stability criteria for the ensuing de Sitter universe.

• OSTI ID: 21020435
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 8; Other Information: DOI: 10.1103/PhysRevD.75.086002; (c) 2007 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
ACTION INTEGRAL
COSMOLOGY
DE SITTER GROUP
EQUATIONS OF STATE
GRAVITATION
NONLUMINOUS MATTER
SCALARS
STABILITY
STRING MODELS
TOPOLOGY
UNIVERSE