503 citations · 4.5k across the 43 of their papers we have counts for
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Planck Constraints and Gravitational Wave Forecasts for Primordial Black Hole Dark Matter Seeded by Multifield Inflation
Wenzer Qin, Sarah R. Geller, Shyam Balaji +2
We perform a Markov Chain Monte Carlo (MCMC) analysis of a simple yet generic multifield inflation model characterized by two scalar fields coupled to each other and nonminimally c…
Flows into de Sitter space from anisotropic initial conditions: An effective field theory approach
Feraz Azhar, David I. Kaiser
For decades, physicists have analyzed various versions of a ``cosmic no-hair" conjecture, to understand under what conditions a spacetime that is initially spatially anisotropic an…
Beyond Schrödinger-Poisson: Nonrelativistic Effective Field Theory for Scalar Dark Matter
Borna Salehian, Hong-Yi Zhang, Mustafa A. Amin +2
Massive scalar fields provide excellent dark matter candidates, whose dynamics are often explored analytically and numerically using nonrelativistic Schrödinger-Poisson (SP) equati…
The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
Rouzbeh Allahverdi, Mustafa A. Amin, Asher Berlin +23
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. W…
Effective theories for a nonrelativistic field in an expanding universe: Induced self-interaction, pressure, sound speed, and viscosity
Borna Salehian, Mohammad Hossein Namjoo, David I. Kaiser
A massive, nonrelativistic scalar field in an expanding spacetime is usually approximated by a pressureless perfect fluid, which leads to the standard conclusion that such a field…
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…