Nonlinear Spinor Fields in LRS Bianchi type-I spacetime: Theory and observation

Abstract

Within the scope of a LRS Bianchi type-I cosmological model we study the role of the nonlinear spinor field in the evolution of the Universe. In doing so we consider a polynomial type of nonlinearity that describes different stages of the evolution. Finally we also use the observational data to fix the problem parameters that match best with the real picture of the evolution. The assessment of the age of the Universe in case of the soft beginning of expansion (initial speed of expansion in a point of singularity is equal to zero) the age was found 15 billion years, whereas in case of the hard beginning (nontrivial initial speed) it was found that the Universe is 13.7 billion years old.

10 pages 7 figures. arXiv admin note: text overlap with arXiv:1507.06236

References in corpus (12)

• Cosmic Microwave Background Quadrupole and Ellipsoidal Universe
• Ellipsoidal Universe Can Solve The CMB Quadrupole Problem
• Anisotropic Dark Energy: Dynamics of Background and Perturbations
• A Model of Universe Anisotropization
• Correlating anomalies of the microwave sky: The Good, the Evil and the Axis
• Noether symmetry for non-minimally coupled fermion fields
• The CMB Quadrupole depression produced by early fast-roll inflation: MCMC analysis of WMAP and SDSS data
• A Complete Statistical Analysis for the Quadrupole Amplitude in an Ellipsoidal Universe
• Nonlinear Spinor Fields in Bianchi type-I spacetime: Problems and Possibilities
• Nonlinear Spinor Fields in Bianchi type-I spacetime reexamined
• Nonlinear Spinor Fields in Bianchi type-VI spacetime
• Nonlinear Spinor Fields in Bianchi type-$V{I}_0$ spacetime