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gr-qc2023★ 5 cited
Gauge/frame invariant variables for the numerical relativity study of cosmological spacetimes
Anna Ijjas
To numerically evolve the full Einstein equations (or modifications thereof), simulations of cosmological spacetimes must rely on a particular formulation of the field equations co…
gr-qc2023★ 28 cited
Initial conditions problem in cosmological inflation revisited
David Garfinkle, Anna Ijjas, Paul J. Steinhardt
We present first results from a novel numerical relativity code based on a tetrad formulation of the Einstein-scalar field equations combined with recently introduced gauge/frame i…
gr-qc2023★ 4 cited
Slow Contraction and the Weyl Curvature Hypothesis
Anna Ijjas
Using the power of numerical relativity, we show that, beginning from generic initial conditions that are far from flat, homogeneous and isotropic and have a large Weyl curvature,…