Realizing late-time cosmology in the context of Dynamical Stability Approach

Abstract

We examine the scenario of non-minimally coupled relativistic fluid and $k$-essence scalar field in a flat Friedmann-Lemaitre-Robertson-Walker universe. By adding a non-minimal coupling term in the Lagrangian level, we study the variation of Lagrangian with respect to independent variables, which produces modified scalar field and Friedmann equations. Using dynamical stability approach in different types of interaction models with two types of scalar field potential, we explore this coupled framework. Implementing detailed analysis, we can conclude our models can able to produce stable late-time cosmic acceleration.

arXiv comment4 pages and 4 figures; Conference proceeding for XXV DAE-BRNS HEP Symposium 2022

References in corpus (8)

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• k-Inflation
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• Dynamical systems applied to cosmology: dark energy and modified gravity
• Action functionals for relativistic perfect fluids
• Dynamical stability of K-essence field interacting non-minimally with a perfect fluid
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• Ghost condensates and pure kinetic $k$-essence condensates in presence of field-fluid non-minimal coupling in the dark sector

Cited by in corpus (2)

• Exploring the evolution of structure growth in the universe with field-fluid interactions through dynamical stability analysis
• A comprehensive dynamical and phenomenological analysis of structure growth in curvature-modulated coupled quintessence scenario