Emergent de Sitter epoch of the quantum Cosmos

Abstract

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.

6 pages, 2 figures, revised version accepted for publication in Phys.Rev.Lett., with the addition of fig.2 and subsequent comments

References in corpus (3)

• Quantum Nature of the Big Bang: Improved dynamics
• Quantum Nature of the Big Bang
• Cosmological Coherent State Expectation Values in LQG I. Isotropic Kinematics

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