Narrow Results

In this paper, we determine the exact solutions of viscous ghost models in sign-changeable interaction scenarios for two choices of bouncing scale factor, assuming the existence of viscous interacting fluid across the flat Friedmann–Robertson–Walker universe in the form of ghost dark energy and pressure-less dark matter. The study demonstrates how the cosmological parameters evolve in viscous sign-changeable interacting scenarios to see the transition time frame. Next, a bounce inflation model is investigated, including the tensor-to-scalar ratio, scalar spectral index, and slow-roll parameters analytical results. Since inflation is usually associated with scalar fields, the study looked at a possible relationship between sign-changeable interacting ghost dark fluids and scalar field models. Lastly, the applicability of the generalized second law (GSL) of thermodynamics is examined for the scenarios that are being studied.

This work reports a study on bounce cosmology with a highly generalized holographic dark fluid inspired by Nojiri and Odintsov [Eur. Phys. J. C 77 (2017) 1–8]. The holographic dark fluid that is mostly used for late-time acceleration has been implemented to reconstruct toward realization of cosmological bounce. We first used the most generalized Nojiri–Odintsov (NO) cutoff to implement the holographic dark fluid. Accordingly, we have reconstructed this dark fluid via some solutions of scale factors. With those solutions, we have explored the evolution of different cosmological parameters. We have examined the effects of each reconstructed parameter in the context of the realization of the cosmic bounce. Next, we use the analytical inferences of the scalar spectral index, tensor-to-scalar ratio, and slow-roll characteristics of the model to study a bounce inflationary scenario. Since inflation is usually associated with the existence of scalar fields, we looked at a possible relationship between NO generalized holographic dark energy and scalar field models. Plotting the evolution of the potential results from the scalar fields against time. Finally, we investigated the GSL of thermodynamics in the pre- and post-bounce scenarios.