München 2019 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 11: Quantum Cosmology and Quantum Gravity II
GR 11.5: Talk
Thursday, March 21, 2019, 12:00–12:15, HS 5
Localized gravitons as essence of dark energy: Implications for accelerated cosmic expansion — •Deiana Drakova1 and Gerold Doyen2 — 1Sofia University, Sofia, Bulgaria — 2LMU Munich, Germany
A theory of Emerging Quantum Mechanics (EQM) has been developed [1] contributing to the understanding of the measurement problem by assigning a quantum dynamical process to collapse within Schrödinger’s theory.
EQM treats cosmological problems in a quantum field theory in high dimensional spacetime (11D) including matter and the gravitational field. Gravity is quantized in the weak interaction limit. The EQM Lagrangian contains terms up to fourth order in the gravitational field. Second and fourth order terms are associated with repulsive dark energy and third order terms with attractive dark matter effects. Gravonon-gravonon repulsion, i.e. dark energy in EQM, modifies the structure of the gravitational field and leads to accelerated expansion of the universe.
Quantum diffusion of the matter particles in three dimensional space is suggested as the mechanism of the expansion of the universe. The rate of expansion is given by the frequency of the soft gravitational modes. The deceleration parameter for the expansion of the universe suggested in EQM is in the range between -0.6 and -0.8, an observed value of -0.54 has been reported.
[1] G. Doyen and D. Drakova, Foundations of Physics 45, 959 (2015).