261 citations · 2.8k across the 60 of their papers we have counts for
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Restrictions on Initial Conditions in Cosmological Scenarios and Implications for Simulations of Primordial Black Holes and Inflation
Thomas W. Baumgarte, Katy Clough, John T. Giblin
Numerical relativity simulations provide a means by which to study the evolution and end point of strong over-densities in cosmological spacetimes. Specific applications include st…
CMB and energy conservation limits on nanohertz gravitational waves
David Wright, John T. Giblin, Jeffrey Hazboun
The recent evidence for a stochastic gravitational wave background (GWB) in the nanohertz band, announced by pulsar timing array (PTA) collaborations around the world, has been pos…
Preheating in Full General Relativity
John T. Giblin, Avery J. Tishue
We investigate the importance of local gravity during preheating, the non-linear dynamics that may be responsible for starting the process of reheating the universe after inflation…
Cosmic expansion from spinning black holes
John T. Giblin, James B. Mertens, Glenn D. Starkman +1
We examine how cosmological expansion arises in a universe containing a lattice of spinning black holes. We study averaged expansion properties as a function of fundamental propert…
A cosmologically motivated reference formulation of numerical relativity
John T. Giblin, James B. Mertens, Glenn D. Starkman
The application of numerical relativity to cosmological spacetimes is providing new insights into the behavior of Einstein's equations, beyond common approximations. In order for s…
Integration of inhomogeneous cosmological spacetimes in the BSSN formalism
James B. Mertens, John T. Giblin, Glenn D. Starkman
We present cosmological-scale numerical simulations of an evolving universe in full general relativity (GR) and introduce a new numerical tool, {\sc CosmoGRaPH}, which employs the…