Fermionic and scalar fields as sources of interacting dark matter-dark energy

Samuel Lepe, Javier Lorca, Francisco Peña, Yerko VÁsquez

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

From a variational action with nonminimal coupling with a scalar field and classical scalar and fermionic interaction, cosmological field equations can be obtained. Imposing a Friedmann-Lemaître-Robertson-Walker (FLRW) metric, the equations lead directly to a cosmological model consisting of two interacting fluids, where the scalar field fluid is interpreted as dark energy and the fermionic field fluid is interpreted as dark matter. Several cases were studied analytically and numerically. An important feature of the non-minimal coupling is that it allows crossing the barrier from a quintessence to phantom behavior. The insensitivity of the solutions to one of the parameters of the model permits it to find an almost analytical solution for the cosmological constant type of universe.

Original languageEnglish
Pages (from-to)2543-2558
Number of pages16
JournalInternational Journal of Modern Physics D
Volume20
Issue number13
DOIs
StatePublished - 23 Dec 2011
Externally publishedYes

Keywords

  • Cosmology
  • dark energy
  • fermions
  • nonminimal coupling
  • scalars

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