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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/38347
Title: 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
URI: http://hdl.handle.net/10261/38347
DOI: 10.1103/PhysRevD.82.023519
ISSN: 1550-7998
E-ISSN: 1550-2368
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