767 citations · 17k across the 373 of their papers we have counts for
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Linear Perturbations in Brane Gas Cosmology
Scott Watson, Robert Brandenberger
We consider the effect of string inhomogeneities on the time dependent background of Brane Gas Cosmology. We derive the equations governing the linear perturbations of the dilaton-…
Large N Cosmology
Robert Brandenberger, Pei-Ming Ho, Hsien-chung Kao
We motivate inflationary scenarios with many scalar fields, and give a complete formulation of adiabatic and entropy perturbations. We find that if the potential is very flat, or i…
Spectral Dependence of CMB Polarization and Parity
K. R. S. Balaji, Robert H. Brandenberger, Damien A. Easson
The polarization of the cosmic microwave background radiation (CMBR) can serve as a probe for nonstandard parity violating interactions. Many such interactions are predicted in par…
Back Reaction Of Perturbations In Two Scalar Field Inflationary Models
Ghazal Geshnizjani, Robert Brandenberger
We calculate the back-reaction of long wavelength cosmological perturbations on a general relativistic measure of the local expansion rate of the Universe. Specifically, we conside…
Non-commutative inflation and the CMB
Shinji Tsujikawa, Roy Maartens, Robert Brandenberger
Non-commutative inflation is a modification of standard general relativity inflation which takes into account some effects of the space-time uncertainty principle motivated by idea…
Stabilization of Extra Dimensions at Tree Level
Scott Watson, Robert Brandenberger
By considering the effects of string winding and momentum modes on a time dependent background, we find a method by which six compact dimensions become stabilized naturally at the…
Inflation and Brane Gases
Robert Brandenberger, Damien A. Easson, Anupam Mazumdar
We investigate a new way of realizing a period of cosmological inflation in the context of brane gas cosmology. It is argued that a gas of co-dimension one branes, out of thermal e…
On the Dependence of the Spectra of Fluctuations in Inflationary Cosmology on Trans-Planckian Physics
Jerome Martin, R. H. Brandenberger
We calculate the power spectrum of metric fluctuations in inflationary cosmology starting with initial conditions which are imposed mode by mode when the wavelength equals some cri…
Non-Topological Inflation from Embedded Defects
Stephon Alexander, Robert Brandenberger, Moshe Rozali
We discuss a new mechanism of obtaining a period of cosmological inflation in the context of string theory. This mechanism is based on embedded defects which form dynamically on hi…
On the Initial Conditions for Brane Inflation
R. Brandenberger, G. Geshnizjani, S. Watson
String theory gives rise to various mechanisms to generate primordial inflation, of which ``brane inflation'' is one of the most widely considered. In this scenario, inflation take…
Spontaneous baryogenesis in warm inflation
Robert H. Brandenberger, Masahide Yamaguchi
We discuss spontaneous baryogenesis in the warm inflation scenario. In contrast with standard inflation models, radiation always exists in the warm inflation scenario, and the infl…