78 citations · 319 across the 16 of their papers we have counts for
16 papers
Primordial fluctuations from deformed quantum algebras
Andrew C. Day, Iain A. Brown, Sanjeev S. Seahra
We study the implications of deformed quantum algebras for the generation of primordial perturbations from slow-roll inflation. Specifically, we assume that the quantum commutator…
On the physical effects of consistent cosmological averaging
Iain A. Brown, Alan A. Coley, D. Leigh Herman +1
We use cosmological perturbation theory to study the backreaction effects of a self-consistent and well-defined cosmological averaging on the dynamics and the evolution of the Univ…
Generation of Arbitrarily Non-Gaussian Fields with a Set Correlation Structure
Iain A. Brown
Non-Gaussianity in the cosmic microwave background and the large-scale structure of galaxies provides an increasingly powerful probe of the universe. I implement an algorithm to ge…
Backreaction: Gauge and Frame Dependences
Iain A. Brown, Joey Latta, Alan Coley
The cosmological backreaction from perturbations is clearly gauge-dependent, and obviously depends on the choice of averaged Hubble rate. We consider two common choices of Hubble r…
Primordial polymer perturbations
Sanjeev S. Seahra, Iain A. Brown, Golam Mortuza Hossain +1
We study the generation of primordial fluctuations in pure de Sitter inflation where the quantum scalar field dynamics are governed by polymer (not Schrodinger) quantization. This…
Gauge Issues in Extended Gravity and f(R) Cosmology
Iain A. Brown, Amir Hammami
We consider issues related to the conformal mapping between the Einstein and Jordan frames in f(R) cosmology. We consider the impact of the conformal transformation on the gauge of…