J. Uzan

Publications281
h-index46
Citations7,879
Highly Influential Citations238
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The fundamental constants and their variation: observational and theoretical status
This article describes the various experimental bounds on the variation of the fundamental constants of nature. After a discussion of the role of fundamental constants, their definition and link with…
Precision big bang nucleosynthesis with improved Helium-4 predictions
Varying Constants, Gravitation and Cosmology
  • J. Uzan
  • Physics
    Living reviews in relativity
  • 28 September 2010
TLDR
The relations between the constants, the tests of the local position invariance and of the universality of free fall are detailed, and the unification mechanisms and the relation between the variation of different constants are described.
Standard big bang nucleosynthesis and primordial CNO abundances after Planck
Primordial or big bang nucleosynthesis (BBN) is one of the three historical strong evidences for the big bang model. The recent results by the Planck satellite mission have slightly changed the…
Dodecahedral space topology as an explanation for weak wide-angle temperature correlations in the cosmic microwave background
TLDR
A simple geometrical model of a finite space—the Poincaré dodecahedral space—which accounts for WMAP's observations with no fine-tuning required is presented, and the model also predicts temperature correlations in matching circles on the sky.
New reaction rates for improved primordial D/H calculation and the cosmic evolution of deuterium
Primordial or big bang nucleosynthesis (BBN) is one of the three historically strong evidences for the big bang model. Standard BBN is now a parameter-free theory, since the baryonic density of the…
Standard Big-Bang Nucleosynthesis after Planck
Primordial or Big Bang nucleosynthesis (BBN) is one of the three historical strong evidences for the Big-Bang model together with the expansion of the Universe and the Cosmic Microwave Background…
Quantifying Organismal Complexity using a Population Genetic Approach
TLDR
An alternative complexity metric based on the number of genetically uncorrelated phenotypic traits contributing to an organism's fitness is proposed, which is more objective than previous suggestions, as complexity is measured from a fundamental biological perspective, that of natural selection.
Mis)interpreting supernovae observations in a lumpy universe
Light from ‘point sources’ such as supernovae is observed with a beam width of the order of the sources’ size – typically less than 1 au. Such a beam probes matter and curvature distributions that…
Coupled Variations of Fundamental Couplings and Primordial Nucleosynthesis
The effect of variations of the fundamental nuclear parameters on big-bang nucleosynthesis are modeled and discussed in detail taking into account the interrelations between the fundamental…
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