93 citations · 262 across the 11 of their papers we have counts for
5 papers · 1 filter
Non-local bispectra from super cosmic variance
Bekir Baytaş, Aruna Kesavan, Elliot Nelson +2
We present examples of non-Gaussian statistics that can induce bispectra matching local and non-local (including equilateral) templates in biased sub-volumes. We find cases where t…
Fossilized Gravitational Wave Relic and Primordial Clocks
Suddhasattwa Brahma, Elliot Nelson, Sarah Shandera
If long wavelength primordial tensor modes are coupled to short wavelength scalar modes, the scalar curvature two-point function will have an off-diagonal component. This `fossil'…
Cosmic Variance of the Spectral Index from Mode Coupling
Joseph Bramante, Jason Kumar, Elliot Nelson +1
We demonstrate that local, scale-dependent non-Gaussianity can generate cosmic variance uncertainty in the observed spectral index of primordial curvature perturbations. In a unive…
Non-Gaussian Mode Coupling and the Statistical Cosmological Principle
Marilena LoVerde, Elliot Nelson, Sarah Shandera
Local-type primordial non-Gaussianity couples statistics of the curvature perturbation ζon vastly different physical scales. Because of this coupling, statistics (i.e. the polyspec…
Statistical Naturalness and non-Gaussianity in a Finite Universe
Elliot Nelson, Sarah Shandera
We study the behavior of n-point functions of the primordial curvature perturbations, assuming our observed Universe is only a subset of a larger space with statistically homogeneo…