147 citations · 442 across the 11 of their papers we have counts for
5 papers · 1 filter
The Robustness of n_s < 0.95 in Racetrack Inflation
Ph. Brax, Stephen C. Davis, M. Postma
A spectral index n_s < 0.95 appears to be a generic prediction of racetrack inflation models. Reducing a general racetrack model to a single-field inflation model with a simple pot…
Embedding Dark Energy in Supergravity
Philippe Brax
We give a brief overview of some of the constraints on the embedding of dark energy in supergravity.
Detecting Chameleons through Casimir Force Measurements
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis +2
The best laboratory constraints on strongly coupled chameleon fields come not from tests of gravity per se but from precision measurements of the Casimir force. The chameleonic for…
Testing Chameleon Theories with Light Propagating through a Magnetic Field
P. Brax, C. van de Bruck, A. C. Davis +2
It was recently argued that the observed PVLAS anomaly can be explained by chameleon field theories in which large deviations from Newton's law can be avoided. Here we present the…
Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results
Ph. Brax, C. van de Bruck, A. -C. Davis
We analyse the PVLAS results using a chameleon field whose properties depend on the environment. We find that, assuming a runaway bare potential and a universal coupling to…