BST3: Daniele Oriti, An emergent universe without fundamental space and time

Conference on the Philosophical Foundations of Quantum Gravity

Hosted by the University of Geneva-University of Illinois at Chicago Space and Time After Quantum Gravity project

Château de Bossey, near Geneva, 27-30 June 2017

Abstract: We discuss a new perspective on the nature of cosmology from the quantum gravity point of view, and more specifically in an emergent spacetime scenario. It is based on results in quantum gravity that suggest non-spatiotemporal structures as the foundation of our spacetime and on the interpretation of cosmological dynamics as the hydrodynamic description of the microscopic quantum dynamics of such building blocks. In this picture, the universe can be seen as sort of (quantum) fluid, the result of their collective interaction, and its cosmological description as appropriate for its coarsest approximation. Beside outlining this picture and its general implications for quantum gravity and cosmology, we also offer some examples of its realisation taken from current research in group field theory, and related quantum gravity formalisms.

[davidwilkie]

If you invoke "perspective" by its physical definition, then it's the "emergent " property of quantized spacetime interference, mathematically, and if there's a comprehension problem with that, it's the distinction between math-physics and perceived historical conventional usage of the concept, of something emerging from nothing by "creation". The only actual difficulty in understanding is reviewing the analysis and definitions of the identified phenomena, in light of a "fluid" statement of existence.