Dark Energy Model with Spinor Matter and Its Quintom Scenario

Abstract

A class of dynamical dark energy models, dubbed Spinor Quintom, can be constructed by a spinor field $\psi$ with a nontraditional potential. We find that, if choosing suitable potential, this model is able to allow the equation-of-state to cross the cosmological constant boundary without introducing any ghost fields. In a further investigation, we show that this model is able to mimic a perfect fluid of Chaplygin gas with $p=-c/\rho$ during the evolution, and also realizes the Quintom scenario with its equation-of-state across -1.

20 pages, 5 figures, accepted by CQG, several references added

References in corpus (9)

• Cosmological Evolution of a Quintom Model of Dark Energy
• Can dark energy evolve to the Phantom?
• On Perturbations of Quintom Bounce
• Dark spinor inflation -- theory primer and dynamics
• Crossing the phantom divide in an interacting generalized Chaplygin gas
• Cosmological model with non-minimally coupled fermionic field
• Dark Matter, Dark Energy and the Chaplygin Gas
• Fitting the Supernova Type Ia Data with the Chaplygin Gas
• Unifying dark components and crossing the phantom divide with a classical Dirac field

Cited by in corpus (2)

• Dark spinors with torsion in cosmology
• Reconstructing a String-Inspired Quintom Model of Dark Energy