The arbitrariness of potentials in interacting quintessence models
  We study the interacting quintessence model with two different types of
interaction by introducing a general parameterization of the quintessence
potentials. The form of the quintessence potentials is arbitrary as the recent
cosmological observations failed to constrain any particular form of the
potentials. We explore the interacting quintessence models and investigate if
an introduction of interaction between the dark sectors can constrain any
particular form of the potential. Our findings reconfirm the arbitrariness of
the quintessence potentials even for the interacting dark energy models. As a
result, it is shown that the current observations are able to put an upper
bound to the interaction parameter for both of the interactions we consider,
although it is not possible to constrain the form of the potentials.
