Big Bang as a critical point

Understand

This essay addresses the issue of gravitational phase transitions in the early universe.

• We suggest that a second order phase transition observed in the Causal Dynamical Triangulations approach to quantum gravity may have a cosmological relevance.
• The phase transition interpolates between a non-geometric crumpled phase of gravity, and an extended phase with classical properties.
• Transitions of this kind have been postulated earlier in the context of geometrogenesis in Quantum Graphity.