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5 papers · 2 filters
Creating perturbations from a decaying field during inflation
Anupam Mazumdar, Lingfei Wang
Typically the fluctuations generated from a decaying field during inflation do not contribute to the large scale structures. In this paper we provide an example where it is possibl…
Modulation of the waterfall by a gauge field
David H. Lyth, Mindaugas Karciauskas
We present the first complete calculation of the curvature perturbation generated during the hybrid inflation waterfall, caused by the coupling of the waterfall field to a gauge fi…
Stable bounce and inflation in non-local higher derivative cosmology
Tirthabir Biswas, Alexey S. Koshelev, Anupam Mazumdar +1
One of the greatest problems of primordial inflation is that the inflationary space-time is past-incomplete. This is mainly because Einstein's GR suffers from a space-like Big Bang…
Separable and non-separable multi-field inflation and large non-Gaussianity
Anupam Mazumdar, Lingfei Wang
In this paper we provide a general framework based on formalism to estimate the cosmological observables pertaining to the cosmic microwave background radiation for non-separa…
The hybrid inflation waterfall and the primordial curvature perturbation
David H. Lyth
Without demanding a specific form for the inflaton potential, we obtain an estimate of the contribution to the curvature perturbation generated during the linear era of the hybrid…