Erratum: Unification of dark energy and dark matter from diffusive cosmology (Physical Review D (2019) 99 (123521) DOI: 10.1103/PhysRevD.99.123521)

D. Benisty, E. I. Guendelman, Z. Haba

Research output: Contribution to journalComment/debate

Abstract

Generalized ideas of unified dark matter and dark energy in the context of dynamical space time theories with a diffusive transfer of energy are studied. The dynamical space-time theories introduce a vector field whose equation of motion guarantees a conservation of a certain energy momentum tensor, which may be related, but in general is not the same as the gravitational energy momentum tensor. This particular energy momentum tensor is built from a general combination of scalar fields derivatives as the kinetic terms, and possibly potentials for the scalar field. By demanding that the dynamical space vector field be the gradient of a scalar the dynamical space time theory becomes a theory for diffusive interacting dark energy and dark matter. These generalizations produce nonconserved energy momentum tensors instead of conserved energy momentum tensors which lead at the end to a formulation for interacting dark energy and dark matter (DE-DM). We solved analytically the theories and we show that the ACDM is a fixed point of these theories at large times. A particular case has asymptotic correspondence to previously studied non-Lagrangian formulations of diffusive exchange between dark energy and dark matter.

Original languageEnglish
Article number049901
JournalPhysical Review D
Volume101
Issue number4
DOIs
StatePublished - 15 Feb 2020

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