Mimetic tensor–vector–scalar cosmology: Incorporating dark matter, dark energy and stiff matter

David Benisty, Moshe M. Chaichian, Markku Oksanen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Phenomenological implications of the Mimetic Tensor–Vector–Scalar theory (MiTeVeS) are studied. The theory is an extension of the vector field model of mimetic dark matter, where a scalar field is also incorporated, and it is known to be free from ghost instability. In the absence of interactions between the scalar field and the vector field, the obtained cosmological solution corresponds to the General theory of Relativity (GR) with a minimally-coupled scalar field. However, including an interaction term between the scalar field and the vector field yields interesting dynamics. There is a shift symmetry for the scalar field with a flat potential, and the conserved Noether current, which is associated with the symmetry, behaves as a dark matter component. Consequently, the solution contains a cosmological constant, dark matter and a stiff matter fluid. Breaking the shift symmetry with a non-flat potential gives a natural interaction between dark energy and dark matter.

Original languageEnglish
Article number101280
JournalPhysics of the Dark Universe
Volume42
DOIs
StatePublished - 1 Dec 2023
Externally publishedYes

Keywords

  • Cosmological constraints
  • Dark energy
  • Mimetic dark matter
  • Stiff matter
  • Tensor–vector–scalar gravity

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Mimetic tensor–vector–scalar cosmology: Incorporating dark matter, dark energy and stiff matter'. Together they form a unique fingerprint.

Cite this