Publikace ÚTF

We present an analysis of the phase space of cosmological models based on a
non-minimal coupling between the geometry and a fermionic condensate. We
observe that the strong constraint coming from the Dirac equations allows a
detailed design of the cosmology of these models, and at the same time
guarantees an evolution towards a state indistinguishable from general relativistic
cosmological models. In this light, we show in detail how the use of
some specific potentials can naturally reproduce a phase of accelerated
expansion. In particular, we find for the first time that an exponential potential
is able to induce two de Sitter phases separated by a power law expansion,
which could be an interesting model for the unification of an inflationary phase
and a dark energy era.