  We investigate the effect of Cooper pair injection in shifting biexciton
energy level of low-symmetry (C2v) quantum dots (QDs) exhibiting nontrivial
fine structure splitting. Coupling QDs to the superconducting coherent state
forms extra fine structures by intermixing the ground and biexcitonic states
where spectroscopic separation of neutral exciton and biexciton can be
diminished, yielding a system to be utilized in time reordering scheme. The
separability of exciton and biexciton energy levels is ascribed to the
corresponding direct, exchange and correlation energies calculated here through
configuration interaction method. We demonstrate the possibility of enhancing
photon entanglement concurrence via providing an energy coincidence for
biexciton-exciton (XX \rightarrow X) and exciton-ground (X \rightarrow 0)
emissions within the weak coupling regime.
