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Cosmological models with non-canonical scalar and fermion fields: k-essence, f-essence and g-essence
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In the present work, we study the cosmological model with fermionic field and with the non-canonical kinetic term (f-essence). We also present some important reductions of the model as well as its some generalizations. We also found the exact solution of the model and examine the influence of such gravity-fermion interaction on the observed accelerated expansion of our universe. Several fermionic and bosonic-fermionic DBI models were constructed as some particular reductions of f-essence and g-essence, respectively and their Chaplygin gas counterparts are found. Finally, some nonlinear models of bouncing and cyclic universes are proposed.
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On the Field Theoretical Description of an Alternative Model to Generalized Chaplygin Gas and its Thermodynamic Behaviour
The authors reconstruct quintessence, k-essence, and DBI scalar-field potentials for the sinc dark-energy fluid, but their thermodynamic phase transition is built from arbitrary constants and the model is disfavored b...
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