Speaker
Description
SU(∞)-QGR is a recently developed foundationally quantum model of
cosmology and gravity (reviewed in arXiv:2409.08932). It treats the Universe as an isolated quantum system having an infinite number of mutually commuting observables. Quantum fluctuations locally fragment the SU(∞) group representing Hilbert space of the Universe to approximately isolated subsystems representing G x SU(∞), where G is a generic finite-rank symmetry and the global SU(∞) symmetry - interpreted as gravity - entangles each subsystem to the rest of the Universe. In addition to parameters of G symmetry, subsystems depend on 4 continuous parameters that their average/effective values are perceived as the classical spacetime with a Lorentzian geometry. In this talk I first highlight the main properties of this model. Then, using the analogy with condensed matter, I present possibilities for the emergence of local strong correlations in the early Universe that may generate - without fine-tuning - over-densities leading to formation of black holes.
