In FRW cosmology, non-minimal spinor-gravity coupling strongly accelerates expansion for matter-like spinor fields, but has little effect for dark-energy-like nonlinearities.
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Non-minimally coupled nonlinear spinor field in FRW cosmology
In FRW cosmology, non-minimal spinor-gravity coupling strongly accelerates expansion for matter-like spinor fields, but has little effect for dark-energy-like nonlinearities.