Spinor Quintom Cosmology with Intrinsic Spin

Emre Dil (Department of Physics, Sinop University, Korucuk, 57000 Sinop, Turkey)

We consider a spinor quintom dark energy model with intrinsic spin, in the framework of Einstein-Cartan-Sciama-Kibble theory. After constructing the mathematical formalism of the model, we obtain the spin contributed total energy-momentum tensor giving the energy density and the pressure of the quintom model, and then we find the equation of state parameter, Hubble parameter, deceleration parameter, state finder parameter, and some distance parameter in terms of the spinor potential. Choosing suitable potentials leads to the quintom scenario crossing between quintessence and phantom epochs, or vice versa. Analyzing three quintom scenarios provides stable expansion phases avoiding Big Rip singularities and yielding matter dominated era through the stabilization of the spinor pressure via spin contribution. The stabilization in spinor pressure leads to neglecting it as compared to the increasing energy density and constituting a matter dominated stable expansion epoch.

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Published on:
07 December 2016
Publisher:
Hindawi Publishing Corporation
Published in:
Advances in High Energy Physics (2016)

DOI:
https://doi.org/10.1155/2016/3740957
arXiv:
1610.07870
Copyrights:
Copyright © 2016 Emre Dil.
Licence:
CC-BY-3.0

Fulltext files: