Abstract Models where dark matter and dark energy interact with each other have been
proposed to solve the coincidence problem. We review the motivations underlying the need …

The interaction between dark matter and dark energy can be incorporated into field theory
models of dark energy that have proved successful in alleviating the coincidence problem …

Dark energy and dark matter are only indirectly measured via their gravitational effects. It is
possible that there is an exchange of energy within the dark sector, and this offers an …

Cosmological analyses based on currently available observations are unable to rule out a
sizeable coupling between dark energy and dark matter. However, the signature of the …

Cosmological models involving an interaction between dark matter and dark energy have
been proposed in order to solve the so-called coincidence problem. Different forms of …

Cosmological models where dark matter (DM) and dark energy (DE) interact with each other
are the general scenarios in compared to the non-interacting models. The interaction is …

The two dark sectors of the universe—dark matter and dark energy—may interact with each
other. Background and linear density perturbation evolution equations are developed for a …

We reconsider the dynamics of the Universe in the presence of interactions in the
cosmological dark sector. A class of interacting models is introduced via a real function fr of …

We consider several cosmological models which allow for nongravitational direct couplings
between dark matter and dark energy. The distinguishing cosmological features of these …

If dark energy interacts with dark matter, this gives a new approach to the coincidence
problem. But interacting dark energy models can suffer from pathologies. We consider the …