Talks by Angelika Fertig

Alternatives to Inflation – Non-Minimal Ekpyrosis & Conflation

Angelika Fertig Perimeter Institute for Theoretical Physics

In this talk I derive the evolution equations for two scalar fields with non-canonical field space metric up to third order in perturbation theory, employing the covariant formalism. These equations can be used to calculate the local bi- and trispectra of the non-minimal ekpyrotic model. Remarkably, the nearly scale-invariant entropy perturbations have vanishing bi- and trispectra during the ekpyrotic phase.