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Universe 2017, 3(2), 39;

Lemaître Class Dark Energy Model for Relaxing Cosmological Constant

A.F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, Polytekhnicheskaja 26, 194021 St. Petersburg, Russia
Department of Mathematics and Computer Science, University of Warmia and Mazury, Słoneczna 54, 10-710 Olsztyn, Poland
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editors: Manuel Krämer, Mariusz P. Dąbrowski and Vincenzo Salzano
Received: 20 January 2017 / Revised: 23 March 2017 / Accepted: 2 May 2017 / Published: 4 May 2017
(This article belongs to the Special Issue Varying Constants and Fundamental Cosmology)
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Cosmological constant corresponds to the maximally symmetric cosmological term with the equation of state p = ρ . Introducing a cosmological term with the reduced symmetry, p r = ρ in the spherically symmetric case, makes cosmological constant intrinsically variable component of a variable cosmological term which describes time-dependent and spatially inhomogeneous vacuum dark energy. Relaxation of the cosmological constant from the big initial value to the presently observed value can be then described in general setting by the spherically symmetric cosmology of the Lemaître class. We outline in detail the cosmological model with the global structure of the de Sitter spacetime distinguished by the holographic principle as the only stable product of quantum evaporation of the cosmological horizon entirely determined by its quantum dynamics. Density of the vacuum dark energy is presented by semiclassical description of vacuum polarization in the spherically symmetric gravitational field, and its initial value is chosen at the GUT scale. The final non-zero value of the cosmological constant is tightly fixed by the quantum dynamics of evaporation and appears in the reasonable agreement with its observational value. View Full-Text
Keywords: dark energy; de Sitter vacuum; spacetime symmetry; relaxing cosmological constant dark energy; de Sitter vacuum; spacetime symmetry; relaxing cosmological constant

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Dymnikova, I.; Dobosz, A.; Sołtysek, B. Lemaître Class Dark Energy Model for Relaxing Cosmological Constant. Universe 2017, 3, 39.

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