93 citations · 262 across the 11 of their papers we have counts for
11 papers
Classical branches and entanglement structure in the wavefunction of cosmological fluctuations
Elliot Nelson, C. Jess Riedel
The emergence of preferred classical variables within a many-body wavefunction is encoded in its entanglement structure in the form of redundant classical information shared betwee…
Classical Entanglement Structure in the Wavefunction of Inflationary Fluctuations
Elliot Nelson, C. Jess Riedel
We argue that the preferred classical variables that emerge from a pure quantum state are determined by its entanglement structure in the form of redundant records: information sha…
Pulsar Timing Constraints on Physics Beyond the Standard Model
Niayesh Afshordi, Hyungjin Kim, Elliot Nelson
We argue that massive quantum fields source low-frequency long-wavelength metric fluctuations through the quantum fluctuations of their stress-energy, given reasonable assumptions…
Quantum Decoherence During Inflation from Gravitational Nonlinearities
Elliot Nelson
We study the inflationary quantum-to-classical transition for the adiabatic curvature perturbation due to quantum decoherence, focusing on the role played by squeezed-limit mod…
Cosmological bounds on TeV-scale physics and beyond
Niayesh Afshordi, Elliot Nelson
We study the influence of the fluctuations of a Lorentz invariant and conserved vacuum on cosmological metric perturbations, and show that they generically blow up in the IR. We co…
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…
Higher time derivatives in effective equations of canonical quantum systems
Martin Bojowald, Suddhasattwa Brahma, Elliot Nelson
Quantum-corrected equations of motion generically contain higher time derivatives, computed here in the setting of canonically quantized systems. The main example in which detailed…