HIGH COHERENCE PHOTONIC QUANTUM ENTANGLEMENT USING BORON NITRIDE/ALUMINUM GALLIUM NITRIDE QUANTUM DOTS
Abstract - This paper calculates excitonic and biexcitonic spectra in boron nitride/aluminum gallium nitride quantum dots with boron nitride as the barrier material. They are relevant to entangled photon pair generation for quantum computation. Spontaneous and piezoelectric polarization effects on excitonic and biexcitonic spectra are quantified.We present calculations of biexciton spectra in Indium Gallium Nitride quantum dots for quantum-entangled photon generation. Biexciton binding energies of more than 100meV are calculated. The many-body Coulomb effects are quantified. The built-in fields due to spontaneous and piezoelectric polarization and their effect on excitonic and bi-excitonic characteristics are studied. Intrinsic decoherence rates of biexcitons are calculated using time-dependent perturbation theory. A The calculations have been done for wurtzite crystal symmetry, but they are easily extensible to cubic symmetries. The energies of polarisation-entangled photons generated from the biexciton cascadecan be obtained from our binding energy calculations.