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Closed Access item ΛCDM universe in f(R) gravity

Other Titles:On the LCDM Universe in f(R) gravity
Authors:Dunsby, Peter K. S.
Elizalde, Emilio
Goswami, Rituparno
Odintsov, Sergei D.
Sáez-Gómez, Diego
Issue Date:22-Jul-2010
Publisher:American Physical Society
Citation:Physical Review - Section D - Particles and Fields 82 (2) : 023519 (2010)
Abstract:Several different explicit reconstructions of f(R) gravity are obtained from the background Friedmann-Laîmatre-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 ΛCDM 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.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.82.023519
E-ISSNmetadata.dc.identifier.doi = DOI:1550-2368
Appears in Collections:(ICE) Artículos

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