  It is proposed that the recently announced BICEP2 value of tensor-to scalar
ratio $r\sim0.2$ can be explained as containing an extra contribution from the
recent acceleration of the universe. In fact this contribution, being robust,
recent and of much longer duration (by a large order of magnitude) may dominate
the contribution from the inflationary origin. In a possible scenario, matter
(dark or baryonic) and radiation etc. can emerge from a single Higgs-like
tachyonic scalar field in the universe through a physical mechanism not yet
fully known to us. The components interact among themselves to achieve the
thermodynamical equilibrium in the evolution of the universe. The field
potential for the present acceleration of the universe would give a boost to
the amplitude of the tensor fluctuations of gravity waves generated by the
early inflation and the net effects may be higher than the earlier PLANCK
bounds. In the process, the dark energy, as a cosmological constant decays into
creation of dark matter. The diagnostics for the three-component, spatially
homogeneous tachyonic scalar field are discussed in detail. The components of
the field with perturbed equation of state are taken to interact mutually and
the conservation of energy for individual components gets violated. We study
mainly the $O_{m}(x)$ diagnostics with the observed set of $H(z)$ values at
various redshifts, and the dimensionless state-finders for these interacting
components. This analysis provides a strong case for the interacting dark
energy in our model.
