A class of dynamical dark energy models, dubbed Spinor Quintom, can be
constructed by a spinor field ψ 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/ρ during
the evolution, and also realizes the Quintom scenario with its
equation-of-state across -1.Comment: 20 pages, 5 figures, accepted by CQG, several references adde