104 citations · 312 across the 4 of their papers we have counts for
7 papers
Cosmological Fluctuations from Infra-Red Cascading During Inflation
Neil Barnaby, Zhiqi Huang, Lev Kofman +1
We propose a qualitatively new mechanism for generating cosmological fluctuations from inflation. The non-equilibrium excitation of interacting scalar fields often evolves into inf…
Dynamics and Stability of Light-Like Tachyon Condensation
Neil Barnaby, David J. Mulryne, Nelson J. Nunes +1
Recently, Hellerman and Schnabl considered the dynamics of unstable D-branes in the background of a linear dilaton. Remarkably, they were able to construct light-like tachyon solut…
Large Nongaussianity from Nonlocal Inflation
N. Barnaby, J. M. Cline
We study the possibility of obtaining large nongaussian signatures in the Cosmic Microwave Background in a general class of single-field nonlocal hill-top inflation models. We esti…
Nongaussianity from Tachyonic Preheating in Hybrid Inflation
Neil Barnaby, James M. Cline
In a previous work we showed that large nongaussianities and nonscale-invariant distortions in the CMB power spectrum can be generated in hybrid inflation models, due to the contri…
Nongaussian and nonscale-invariant perturbations from tachyonic preheating in hybrid inflation
Neil Barnaby, James M. Cline
We show that in hybrid inflation it is possible to generate large second-order perturbations in the cosmic microwave background due to the instability of the tachyonic field during…
Tachyon Defect Formation and Reheating in Brane-Antibrane Inflation
Neil Barnaby, James M. Cline
We study analytically the dynamical formation of lower dimensional branes at the endpoint of brane-antibrane inflation through the condensation of topological defects of the tachyo…