{Lambda}CDM universe in f(R) gravity

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.023519· OSTI ID:21410103

Dunsby, Peter K. S. ^[1]; Elizalde, Emilio; Saez-Gomez, Diego ^[2]; Goswami, Rituparno ^[1]; Odintsov, Sergei ^[2]

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1. Centre for Astrophysics, Cosmology and Gravitation, University of Cape Town, Rondebosch, 7701 (South Africa)
2. Institut d'Estudis Espacials de Catalunya, ICE (IEEC-CSIC), Campus UAB, Facultat Ciencies, Torre C5-Par-2a pl, E-08193 Bellaterra, Barcelona (Spain)

Several different explicit reconstructions of f(R) gravity are obtained from the background Friedmann-Laimatre-Robertson-Walker expansion history. It is shown that the only theory whose Lagrangian is a simple function of the Ricci scalar R, that admits an exact {Lambda}CDM expansion history, is standard general relativity with a positive cosmological constant and the only way to obtain this behavior of the scale factor for more general functions of R is to add additional degrees of freedom to the matter sector.

• OSTI ID: 21410103
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevD.82.023519; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGICAL CONSTANT
DEGREES OF FREEDOM
EXPANSION
GENERAL RELATIVITY THEORY
GRAVITATION
LAGRANGIAN FUNCTION
NONLUMINOUS MATTER
SIMULATION
UNIVERSE
FIELD THEORIES
FUNCTIONS
MATTER
RELATIVITY THEORY