Collapse of simple harmonic universe
Audrey T. Mithani and Alexander Vilenkin
Published 10 January 2012 • , ,
1475-7516/2012/01/028
In a recent paper Graham et al constructed oscillating and static universe models which are stable with respect to all classical perturbations. Here we show that such universes are quantum-mechanically unstable and can collapse by quantum tunneling to zero radius. We also present instantons describing nucleation of oscillating and static universes from nothing.