Seminarium "Teoria cząstek elementarnych i kosmologia"

By using the regularization techniques of Loop Quantum Gravity we reexamine the quantum nature of the Big Bang in the framework of Loop Quantum Cosmology. The studies of the dynamics of a simple isotropic quantum Universe lead to a qualitative modification to the 'traditional' LQC bounce paradigm. Quantum gravity effects still lead to a quantum bounce connecting deterministically large classical Universes. However, the evolution features a large epoch of de Sitter Universe, with emergent cosmological constant of Planckian order, smoothly transiting into a flat expanding Universe.