Viewing the Cosmological Consequences of Modified Holographic Dark Energy in Various Interaction Scenarios

Abstract

In the work reported here, we have considered the interaction between modified holographic Ricci dark energy, a particular choice of Nojiri–Odintsov cut-offs, and pressureless dark matter for three different choices of scale factor, namely logamediate, intermediate, and emergent. Two different interaction terms have been considered. In one case, the interaction has been taken proportional to the dark energy density; in the other case, it has been taken proportional to the matter density. In the case ofQ=3Hδρx, we have observed that there is a crossing of phantom boundary and the equation of state parameter has been observed to behave like quintessence. The influence of various parameters in the scale factors has also been observed. Also, an exit from phantom phase has been observed for the choice of scale factor in the emergent form. Considering the interaction termQto be proportional to the matter density for logamediate scale factor,wxhas been found to behave like quintessence, i.e. >−1. For the emergent scale factor in this interaction scenario, the model has been found to lead to awxparameter lying in the region ≤−1. Therefore, in general, it has been found thatQ=3Hδρxis more suitable thanQ=3Hδρmin creating a model having awxparameter crossing the phantom boundary.

Addressing the high-f problem in pseudo-Nambu–Goldstone boson dark energy models with dark matter–dark energy interaction

“…We consider here a nonminimal coupling between the two dark sector components namely, dark matter and dark energy instead of treating them independently. In literature various authors discussed the interacting dark energy (IDE) models [15] to address different phenomenological problems [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”