102 citations · 302 across the 6 of their papers we have counts for
6 papers
Non-Gaussian perturbations from multi-field inflation
Laura E. Allen, Sujata Gupta, David Wands
We show how the primordial bispectrum of density perturbations from inflation may be characterised in terms of manifestly gauge-invariant cosmological perturbations at second order…
Dynamics and Non-Gaussianity in the Weak-Dissipative Warm Inflation Scenario
Sujata Gupta
We calculate the general solutions for a warm inflationary scenario with weak dissipation, reviewing the dissipative dynamics of the two-fluid system, and calculate the bispectrum…
Curvature and isocurvature perturbations in a three-fluid model of curvaton decay
Sujata Gupta, Karim A. Malik, David Wands
We study the evolution of the cosmological perturbations after inflation in curvaton models where the non-relativistic curvaton decays into both radiation and a cold dark matter co…
Non-Gaussian Signatures in the Cosmic Background Radiation from Warm Inflation
S. Gupta, A. Berera, A. F. Heavens +1
We calculate the bispectrum of the gravitational field fluctuations generated during warm inflation, where dissipation of the vacuum potential during inflation is the mechanism for…
Fast Parameter Estimation from the CMB Power Spectrum
Sujata Gupta, Alan F. Heavens
The statistical properties of a map of the primary fluctuations in the cosmic microwave background (CMB) may be specified to high accuracy by a few thousand power spectra measureme…
Full-sky correlations of peaks in the microwave background
Alan F. Heavens, Sujata Gupta
We compute precise predictions for the two-point correlation function of local maxima (or minima) in the temperature of the microwave background, under the assumption that it is a…