PANG, X. Late Time Acceleration of the Universe From Quantum Gravity. Universe2022, 8, 163.
PANG, X. Late Time Acceleration of the Universe From Quantum Gravity. Universe 2022, 8, 163.
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.
dark energy theory; quantum cosmology; quantum gravity phenomenology
PHYSICAL SCIENCES, General & Theoretical Physics
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