Gong–Zhang Type I/II dark-energy parametrizations remain competitive with ΛCDM under late-time probes, with GZ2 preferred and configuration entropy sensitive to late-time clustering.
Realizing late-time cosmology in the context of Dynamical Stability Approach
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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.
fields
gr-qc 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
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Observational and Thermodynamic aspects of one-dimensional Dark Energy EoS parametrization models
Gong–Zhang Type I/II dark-energy parametrizations remain competitive with ΛCDM under late-time probes, with GZ2 preferred and configuration entropy sensitive to late-time clustering.