Eur. Phys. J. C (2011) 71: 1656
https://doi.org/10.1140/epjc/s10052-011-1656-8

Regular Article - Theoretical Physics

Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms

¹ Information Media Center, Hiroshima University, Higashi-Hiroshima, 739-8521, Japan
² Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, 739-8521, Japan
³ Department of Physics, Nankai University, Tianjin, 300071, P.R. China

^* e-mail: inagaki@hiroshima-u.ac.jp

Received: 24 February 2011
Revised: 4 May 2011
Published online: 2 June 2011

Abstract

We study spinor field theories as an origin to induce space-time evolution. Self-interacting spinor fields with canonical and non-canonical kinetic terms are considered in a Friedman–Robertson–Walker universe. The deceleration parameter is calculated by solving the equation of motion and the Friedman equation, simultaneously. It is shown that the spinor fields can accelerate and decelerate the universe expansion. To construct realistic models we discuss the contributions from the dynamical symmetry breaking.