A unified geometric description of the Universe: From inflation to late-time acceleration without an inflaton nor a cosmological constant

Physics Letters B

Gustavo Arciniega¹  Luisa G. Jaime² 

[1] Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 50-542, CDMX, 04510, Coyoacán, Mexico;Corresponding authors.;

关键词: Modified gravity;    Dark energy;    Inflation;    Cosmology;   

DOI  :  

来源: DOAJ

【 摘 要 】

We present a cosmological model arising from a gravitational theory with an infinite tower of higher-order curvature invariants that can reproduce the entire evolution of the Universe: from inflation to late-time acceleration, without invoking an inflaton nor a cosmological constant. The theory is Einsteinian-like. The field equations for a Friedmann-Lemaître-Robertson-Walker metric are of second-order and can reproduce a late-time evolution that is consistent with the acceleration provided by the cosmological constant at low redshift. Our results force us to reinterpret the nature of dark energy, becoming a mechanism that is inherited solely from the geometry of spacetime.

【 授权许可】

Unknown