Cosmological initial data for numerical relativity

Abstract

We find initial data for numerical relativity simulations of inhomogeneous cosmologies. This involves treating an exceptional case of the general relativity constraint equations. We devise analytic and numerical methods to treat this exceptional case. We apply the analytic method to the standard case of cosmology with a single scalar field. The numerical method is applied to the two-field ekpyrotic cosmology.

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• Inhomogeneous initial conditions for inflation: A wibbly-wobbly timey-wimey path to salvation
• CTTK: A new method to solve the initial data constraints in numerical relativity
• Starting inflation from inhomogeneous initial conditions with momentum
• Gravitational dynamics in Higgs inflation: Preinflation and preheating with an auxiliary field
• Cosmology using numerical relativity
• Solving the initial conditions problem for modified gravity theories