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Dynamical stability of K-essence field interacting non-minimally with a perfect fluid

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arxiv 2105.00361 v4 pith:MM4SOJP5 submitted 2021-05-02 gr-qc hep-th

Anirban Chatterjee , Saddam Hussain , Kaushik Bhattacharya This is my paper · ORCID
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keywords modelsfieldcoupleddynamicalequationsessencefluidnon-minimally
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abstract

We study models of non-minimally coupled relativistic fluid and $k$-essence scalar field in the background of a flat Friedmann-Lemaitre-Robertson-Walker universe. The non-minimal coupling term is introduced in the Lagrangian level. We employ the variational approach with respect to independent variables that produce modified $k-$essence field equations and the Friedmann equations. We have analyzed the coupled field-fluid framework explicitly using the dynamical system technique considering two different models based on inverse power-law potential. After examining these models it is seen that both models are capable of producing accelerating attractor solutions satisfying adiabatic sound speed conditions.

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Cited by 2 Pith papers

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