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Dark Energy and Spacetime Symmetry

A.F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, Polytekhnicheskaja 26, St. Petersburg 194021, Russia
Department of Mathematics and Computer Science, University of Warmia and Mazury, Słoneczna 54, 10-710 Olsztyn, Poland
Academic Editors: Mariusz P. Dąbrowski, Manuel Krämer and Vincenzo Salzano
Universe 2017, 3(1), 20;
Received: 23 January 2017 / Revised: 27 February 2017 / Accepted: 1 March 2017 / Published: 3 March 2017
(This article belongs to the Special Issue Varying Constants and Fundamental Cosmology)
PDF [280 KB, uploaded 3 March 2017]


The Petrov classification of stress-energy tensors provides a model-independent definition of a vacuum by the algebraic structure of its stress-energy tensor and implies the existence of vacua whose symmetry is reduced as compared with the maximally symmetric de Sitter vacuum associated with the Einstein cosmological term. This allows to describe a vacuum in general setting by dynamical vacuum dark fluid, presented by a variable cosmological term with the reduced symmetry which makes vacuum fluid essentially anisotropic and allows it to be evolving and clustering. The relevant solutions to the Einstein equations describe regular cosmological models with time-evolving and spatially inhomogeneous vacuum dark energy, and compact vacuum objects generically related to a dark energy: regular black holes, their remnants and self-gravitating vacuum solitons with de Sitter vacuum interiors—which can be responsible for observational effects typically related to a dark matter. The mass of objects with de Sitter interior is generically related to vacuum dark energy and to breaking of space-time symmetry. In the cosmological context spacetime symmetry provides a mechanism for relaxing cosmological constant to a needed non-zero value. View Full-Text
Keywords: dark energy; de Sitter vacuum; spacetime symmetry; relaxing cosmological constant; dark matter; regular black hole remnants; mass and spacetime symmetry dark energy; de Sitter vacuum; spacetime symmetry; relaxing cosmological constant; dark matter; regular black hole remnants; mass and spacetime symmetry

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Dymnikova, I. Dark Energy and Spacetime Symmetry. Universe 2017, 3, 20.

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