Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Late Time Acceleration of the Universe from Quantum Gravity

Version 1 : Received: 6 January 2022 / Approved: 10 January 2022 / Online: 10 January 2022 (12:49:38 CET)

A peer-reviewed article of this Preprint also exists.

PANG, X. Late Time Acceleration of the Universe From Quantum Gravity. Universe 2022, 8, 163. PANG, X. Late Time Acceleration of the Universe From Quantum Gravity. Universe 2022, 8, 163.

Journal reference: Universe 2022, 8, 163
DOI: 10.3390/universe8030163

Abstract

We show that the accelerating expansion phase of the universe can emerge from the group field theory formalism, a candidate theory of quantum gravity. The cosmological evolution can be extracted from condensate states using mean field approximation, in a form of modified FLRW equations. By introducing an effective equation of state w, we can reveal the relevant features of the evolution, and show that with proper choice of parameters, w will approach to −1, corresponds to the behaviour of cosmological constant, results in a late time acceleration and leads to de Sitter spacetime asymptotically.

Keywords

dark energy theory; quantum cosmology; quantum gravity phenomenology

Subject

PHYSICAL SCIENCES, General & Theoretical Physics

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