104 citations · 245 across the 5 of their papers we have counts for
5 papers
A Back-reaction Induced Lower Bound on the Tensor-to-Scalar Ratio
P. Martineau, R. Brandenberger
There are large classes of inflationary models, particularly popular in the context of string theory and brane world approaches to inflation, in which the ratio of linearized tenso…
More on the Spectrum of Perturbations in String Gas Cosmology
Robert H. Brandenberger, Sugumi Kanno, Jiro Soda +5
String gas cosmology is rewritten in the Einstein frame. In an effective theory in which a gas of closed strings is coupled to a dilaton gravity background without any potential fo…
Back-Reaction: A Cosmological Panacea
P. Martineau, R. Brandenberger
We present a solution to the dark energy problem in terms of the Effective Energy Momentum Tensor (EMT) of cosmological perturbations. The approach makes use of the gravitational b…
The Effects of Gravitational Back-Reaction on Cosmological Perturbations
Patrick Martineau, Robert Brandenberger
Because of the non-linearity of the Einstein equations, the cosmological fluctuations which are generated during inflation on a wide range of wavelengths do not evolve independentl…
Reheating from Tachyon Condensation
James M. Cline, Hassan Firouzjahi, Patrick Martineau
We argue that it may be possible to reheat the universe after inflation driven by D-brane annihilation, due to the coupling of massless fields to the time-dependent tachyon condens…