We investigate the observational consequences of a novel class of stable interacting dark
energy (IDE) models, featuring interactions between dark matter (DM) and dark energy (DE) …

In almost all interacting dark energy models present in the literature, the stability of the
model becomes potentially sensitive to the dark energy equation-of-state parameter wx, and …

We study a generic class of time-evolving vacuum models which can provide a better
phenomenological account of the overall cosmological observations as compared to the Λ …

Recent studies suggest that dynamical dark energy (DDE) provides a better fit to the rising
affluence of modern cosmological observations than the concordance model (ΛCDM) with a …

We study large-scale inhomogeneous perturbations and instabilities of interacting dark-
energy models. Past analysis of large-scale perturbative instabilities has shown that we can …

Non-gravitational interaction between two barotropic dark fluids, namely the pressureless
dust and the dark energy in a spatially flat Friedmann-Lemaître–Robertson–Walker model …

After about two decades of the first observational papers confirming the accelerated
expansion of the universe, we are still facing the question whether the cause of it is a rigid …

A recent observation points to an excess in the expected 21-cm brightness temperature from
cosmic dawn. In this paper, we present an alternative explanation of this phenomenon, an …

Assuming a nongravitational interaction among the dark fluids of our Universe—namely,
dark matter and dark energy—we study a specific interaction model in the background of a …

We investigate the constraints on total neutrino mass in the scenario of vacuum energy
interacting with cold dark matter. We focus on two typical interaction forms, ie, Q= βH ρ c and …