513 citations · 8.5k across the 224 of their papers we have counts for
10 papers · 1 filter
Chameleon Fragmentation
Philippe Brax, Amol Upadhye
A scalar field dark energy candidate could couple to ordinary matter and photons, enabling its detection in laboratory experiments. Here we study the quantum properties of the cham…
Early Modified Gravity: Implications for Cosmology
Philippe Brax, Carsten van de Bruck, Sebastien Clesse +2
We study the effects of modifications of gravity after Big Bang Nucleosynthesis (BBN) which would manifest themselves mainly before recombination. We consider their effects on the…
An Environmental Variation of Constants
Philippe Brax
Models of modified gravity, whereby local tests of gravity are evaded thanks to a screening mechanism of the chameleon or Damour-Polyakov types, lead to a spatial variation of the…
Novel Probes of Gravity and Dark Energy
Bhuvnesh Jain, Austin Joyce, Rodger Thompson +29
The discovery of cosmic acceleration has stimulated theorists to consider dark energy or modifications to Einstein's General Relativity as possible explanations. The last decade ha…
Probing Strongly Coupled Chameleons with Slow Neutrons
Philippe Brax, Guillaume Pignol, Damien Roulier
We consider different methods to probe chameleons with slow neutrons. Chameleon modify the potential of bouncing neutrons over a flat mirror in the terrestrial gravitational field.…
Cosmological Tests of the Disformal Coupling to Radiation
Philippe Brax, Clare Burrage, Anne-Christine Davis +1
Light scalar fields can naturally couple disformally to Standard Model fields without giving rise to the unacceptably large fifth forces usually associated with light scalars. We s…