Abstract

A holographic origin of extremely high Einstein's cosmlogical constant Λ, interpreted as the quantum electrodynamical vacuum energy density with Planck scale cut-off, is examined. And the supression of calculated value Λ ~ 10122 to deep sky survey data 0 ≤ Λ ≤ 1 is attributed to the mass defect of the semiclosed Friedman universe joined-on to an asymptotically flat Schwarzshild empty space, forming a gravitational self-closure or evolving a Planck scale black hole in flat space evaporating holographic content of the semiclosed universe as dark energy.