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- W2988290814 abstract "We consider a homogeneous and isotropic Universe, described by the minisuperspace Lagrangian with the scale factor as a generalized coordinate. We show that the energy of a closed Universe is zero. We apply the uncertainty principle to this Lagrangian and propose that the quantum uncertainty of the scale factor causes the primordial fluctuations of the matter density. We use the dynamics of the early Universe in the Einstein–Cartan theory of gravity with spin and torsion, which eliminates the big-bang singularity and replaces it with a nonsingular bounce. Quantum particle production in highly curved spacetime generates a finite period of cosmic inflation that is consistent with the Planck satellite data. From the inflated primordial fluctuations we determine the magnitude of the temperature fluctuations in the cosmic microwave background, as a function of the numbers of the thermal degrees of freedom of elementary particles and the particle production coefficient which is the only unknown parameter." @default.
- W2988290814 created "2019-11-22" @default.
- W2988290814 creator A5017028948 @default.
- W2988290814 date "2018-12-28" @default.
- W2988290814 modified "2023-09-23" @default.
- W2988290814 title "Primordial fluctuations of scale factor in closed Universe in Einstein–Cartan gravity" @default.
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- W2988290814 doi "https://doi.org/10.1142/s021773231850236x" @default.
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