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Abstract: We extend the usual gravitational action principle by promoting the barecosmological constant CC from a parameter to a field which can take manypossible values. Variation leads to a new integral constraint equation whichdetermines the classical value of the effective CC that dominates the wavefunction of the universe. In a realistic cosmological model, the expected valueof the effective CC, is calculated from measurable quantities to be Ot U, asobserved, where t U is the present age of the universe in Planck units,. Anyapplication of our model produces a falsifiable prediction for $\Lambda $ interms of other measurable quantities. This leads to a specific falsifiableprediction for the observed spatial curvature parameter of Omega k0=-0.0055.Our testable proposal requires no fine tunings or extra dark-energy fields butdoes suggest a new view of time and cosmological evolution.



Autor: John D. Barrow, Douglas J. Shaw

Fuente: https://arxiv.org/







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