A Cosmological Model with Dark Spinor Source

In this paper, we discuss the system of massive nonlinear dark spinors coupling with the Friedman-Robertson-Walker(FRW) metric in detail, where the thermodynamic movement of spinors is also taken into account. The results reveal that, the nonlinear potential of the spinor field can provide a little negative pressure, which resists the universe to become singular. The model is oscillating in time and closed in space. The corresponding metric approximately takes the following form $g_{\mu\nu}=\bar R^2 (1-\delta\cos t)^2 \diag(1,-1,-\sin^2r,-\sin^2r \sin^2\th), (\delta