The Self-Organized de Sitter Universe

Understand

We propose a theory of quantum gravity which formulates the quantum theory as a nonperturbative path integral, where each spacetime history appears with a weight given by the exponentiated Einstein-Hilbert action of the corresponding causal geometry.

• The path integral is diffeomorphism-invariant (only geometries appear) and background-independent.
• The theory can be investigated by computer simulations, which show that a de Sitter universe emerges on large scales.
• This emergence is of an entropic, self-organizing nature, with the weight of the Einstein-Hilbert action playing a minor role.