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We investigate the effect of Cooper pair injection in shifting biexcitonenergy level of low-symmetry (C2v) quantum dots (QDs) exhibiting nontrivialfine structure splitting. Coupling QDs to the superconducting coherent stateforms extra fine structures by intermixing the ground and biexcitonic stateswhere spectroscopic separation of neutral exciton and biexciton can bediminished, yielding a system to be utilized in time reordering scheme. Theseparability of exciton and biexciton energy levels is ascribed to thecorresponding direct, exchange and correlation energies calculated here throughconfiguration interaction method. We demonstrate the possibility of enhancingphoton entanglement concurrence via providing an energy coincidence forbiexciton-exciton (XX \rightarrow X) and exciton-ground (X \rightarrow 0)emissions within the weak coupling regime.

Entangled Photon Pair Generation in Hybrid Superconductor-Semiconductor Quantum Dot Devices