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- California Institute of TechnologyUS161 papers
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Showing 2020 · astro-ph.COShow all
3 papers · 2 filters
astro-ph.CO2020★ 11 cited
On the question of measuring spatial curvature in an inhomogeneous universe
Chi Tian, Stefano Anselmi, Matthew F. Carney +3
The curvature of a spacetime, either in a topological sense, or averaged over super-horizon-sized patches, is often equated with the global curvature term that appears in Friedmann…
astro-ph.CO2020★ 34 cited
Constraining early dark energy with gravitational waves before recombination
Zachary J. Weiner, Peter Adshead, John T. Giblin
We show that the nonperturbative decay of ultralight scalars into Abelian gauge bosons, recently proposed as a possible solution to the Hubble tension, produces a stochastic backgr…
astro-ph.CO2020★ 38 cited
Time-Scales for Nonlinear Processes in Preheating after Multifield Inflation with Nonminimal Couplings
Jorinde van de Vis, Rachel Nguyen, Evangelos I. Sfakianakis +2
We have conducted extensive lattice simulations to study the post-inflation dynamics of multifield models involving nonminimal couplings. We explore the parameter dependence of pre…