Emergent de Sitter epoch of the quantum Cosmos

Understand

The quantum nature of the Big Bang is reexamined in the framework of Loop Quantum Cosmology.

• The strict application of a regularization procedure to the Hamiltonian, originally developed for the Hamiltonian in loop quantum gravity, leads to a qualitative modification of the 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.