##### Model for a time-symmetric Milne-like universe without big bang curvature singularity
We present a physics model for a time-symmetric Milne-like universe based on the $q$-theory approach to the cosmological constant problem, supplemented by an assumed vacuum-matter energy exchange possibly due to quantum-dissipative effects. Without fine-tuning of the initial vacuum energy density, we obtain a harmless big bang singularity (with finite values of the Ricci and Kretschmann curvature scalars) and attractor behavior towards Minkowski spacetime. The time-symmetric spacetime manifold of our model may provide a proper setting for the discussion of a possible CPT-symmetric universe.
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RelativityPaper: Model for a time-symmetric Milne-like universe without big bang curvature singularity. https://t.co/JSIleI6oFs