Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed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

How to cite: Pang, X. Late Time Acceleration of the Universe from Quantum Gravity. Preprints 2022, 2022010114 (doi: 10.20944/preprints202201.0114.v1). Pang, X. Late Time Acceleration of the Universe from Quantum Gravity. Preprints 2022, 2022010114 (doi: 10.20944/preprints202201.0114.v1).

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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