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9 papers · 2 filters
Hemispherical Power Asymmetry from Scale-Dependent Modulated Reheating
John McDonald
We propose a new model for the hemispherical power asymmetry of the CMB based on modulated reheating. Non-Gaussianity from modulated reheating can be small enough to satisfy the bo…
Primordial blackholes and gravitational waves for an inflection-point model of inflation
Sayantan Choudhury, Anupam Mazumdar
In this article we provide a new closed relationship between cosmic abundance of primordial gravitational waves and primordial blackholes originated from initial inflationary pertu…
CMB dipole asymmetry from a fast roll phase
Anupam Mazumdar, Lingfei Wang
The observed CMB (cosmic microwave background) dipole asymmetry cannot be explained by a single field model of inflation - it inevitably requires more than one field where one of t…
Isocurvature and Curvaton Perturbations with Red Power Spectrum and Large Hemispherical Asymmetry
John McDonald
We calculate the power spectrum and hemispherical asymmetry of isocurvature and curvaton perturbations due to a complex field Φwhich is evolving along the tachyonic part of its pot…
Small non-Gaussianity and dipole asymmetry in the CMB
Lingfei Wang, Anupam Mazumdar
In this paper we provide a prescription for obtaining a small non-Gaussianity and the observed dipole asymmetry in the cosmic microwave background radiation. The observations inevi…
The CMB asymmetry from inflation
David H. Lyth
Erickcek, Kamionkowski and Carroll proposed in 2008 that the dipole modulation of the CMB could be due to a very large scale perturbation of the field causing the primordial cu…