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20242026
most citedCosmological effect of coherent oscillation of ultralight scalar fields in a multicomponent universe

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gr-qc2026

Sub-Horizon and Quasi-Static Approximations in Interacting Dark Sector Models Involving Scalar Field Dark Energy

Priyanka Saha, Sharvari Nadkarni-Ghosh, Kaushik bhattacharya

We investigate the validity of the sub-horizon approximation (SHA) and quasi-static approximation (QSA) for linear matter perturbations in interacting scalar-field dark-energy mode…