767 citations · 17k across the 373 of their papers we have counts for
13 papers · 1 filter
Single Field Baryogenesis and the Scale of Inflation
K. R. S. Balaji, R. H. Brandenberger, Alessio Notari
In the context of inflationary cosmology, we discuss a minimal baryogenesis scenario in which the resulting baryon to entropy ratio is determined by the amplitude of the anisotropi…
Challenges for Inflationary Cosmology
Robert H. Brandenberger
Inflationary cosmology has provided a predictive and phenomenologically very successful scenario for early universe cosmology. Attempts to implement inflation using scalar fields,…
Back-Reaction and the Trans-Planckian Problem of Inflation Revisited
Robert H. Brandenberger, Jerome Martin
It has recently been suggested that Planck scale physics may effect the evolution of cosmological fluctuations in the early stages of cosmological inflation in a non-trivial way, l…
Enhanced reheating via Bose condensates
Rouzbeh Allahverdi, Robert Brandenberger, Anupam Mazumdar
In supersymmetric extensions of the particle physics Standard Model, gauge invariant combinations of squarks and sleptons (flat directions) can acquire large expectation values dur…
Back-Reaction of Cosmological Perturbations in the Infinite Wavelength Approximation
Robert H. Brandenberger, C. S. Lam
Cosmological perturbations in an expanding universe back-react on the space-time in which they propagate. Calculations to lowest non-vanishing order in perturbation theory indicate…
Single Field Baryogenesis
K. R. S. Balaji, Robert H. Brandenberger
We propose a new variant of the Affleck-Dine baryogenesis mechanism in which a rolling scalar field couples directly to left- and right-handed neutrinos, generating a Dirac mass te…
Vector Perturbations in a Contracting Universe
Thorsten Battefeld, Robert Brandenberger
In this note we show that vector perturbations exhibit growing mode solutions in a contracting Universe, such as the contracting phase of the Pre Big Bang or the Cyclic/Ekpyrotic m…
Inflation in Gauged 6D Supergravity
Robert H. Brandenberger, S. Randjbar-Daemi
In this note we demonstrate that chaotic inflation can naturally be realized in the context of an anomaly free minimal gauged supergravity in D=6 which has recently been the focus…
Dynamical CP Violation in the Early Universe
K. R. S. Balaji, Tirthabir Biswas, Robert H. Brandenberger +1
Following earlier ideas of Dolgov, we show that the asymmetrical dynamical evolution of fields in the early Universe provides a new source for CP violation. This can lead to baryog…
Dynamical Relaxation of the Cosmological Constant and Matter Creation in the Universe
Robert Brandenberger, Anupam Mazumdar
In this Letter we discuss the issues of the graceful exit from inflation and of matter creation in the context of a recent scenario \cite{RHBrev} in which the back-reaction of long…
Radion Stabilization by Stringy Effects in General Relativity
Subodh P. Patil, Robert Brandenberger
We consider the effects of a gas of closed strings (treated quantum mechanically) on a background where one dimension is compactified on a circle. After we address the effects of a…
Perturbations in a Bouncing Brane Model
T. J. Battefeld, S. P. Patil, R. Brandenberger
The question of how perturbations evolve through a bounce in the Cyclic and Ekpyrotic models of the Universe is still a matter of ongoing debate. In this report we show that the co…
Note on the Robustness of the Neutrino Mass Bounds from Cosmology
Robert H. Brandenberger, Anupam Mazumdar, Masahide Yamaguchi
The recent high precision maps of cosmic microwave anisotropies combined with measurements of the galaxy power spectrum from new large-scale redshift surveys have allowed stringent…