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Título : ΛCDM universe in f(R) gravity
Otros títulos: On the LCDM Universe in f(R) gravity
Autor : Dunsby, Peter K. S., Elizalde, Emilio, Goswami, Rituparno, Odintsov, Sergei D., Sáez-Gómez, Diego
Fecha de publicación : 22-Jul-2010
Editor: American Physical Society
Resumen: 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.
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ISSN: 1550-7998
DOI: 10.1103/PhysRevD.82.023519
Citación : Physical Review - Section D - Particles and Fields 82 (2) : 023519 (2010)
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