113 citations · 334 across the 5 of their papers we have counts for
6 papers
The influence of structure formation on the cosmic expansion
Chris Clarkson, Kishore Ananda, Julien Larena
We investigate the effect that the average backreaction of structure formation has on the dynamics of the cosmological expansion, within the concordance model. Our approach in the…
Power-law cosmic expansion in f(R) gravity models
Naureen Goheer, Julien Larena, Peter K. S. Dunsby
We show that within the class of f(R) gravity theories, FLRW power-law perfect fluid solutions only exist for R^n gravity. This significantly restricts the set of exact cosmologica…
Spatially averaged cosmology in an arbitrary coordinate system
J. Larena
This paper presents a general averaging procedure for a set of observers which are tilted with respect to the cosmological matter fluid. After giving the full set of equations desc…
Reinterpreting quintessential dark energy through averaged inhomogeneous cosmologies
Julien Larena, Thomas Buchert, Jean-Michel Alimi
Regionally averaged relativistic cosmologies have recently been considered as a possible explanation for the apparent late time acceleration of the Universe. This contribution repo…
Correspondence between kinematical backreaction and scalar field cosmologies - the `morphon field'
Thomas Buchert, Julien Larena, Jean-Michel Alimi
Spatially averaged inhomogeneous cosmologies in classical general relativity can be written in the form of effective Friedmann equations with sources that include backreaction term…
Big Bang nucleosynthesis in scalar tensor gravity: the key problem of the Li abundance
Julien Larena, Jean-Michel Alimi, Arturo Serna
Combined with other CMB experiments, the WMAP survey provides an accurate estimate of the baryon density of the Universe. In the framework of the standard Big Bang Nucleosynthesis…