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Patent Granted A method for generating a quantum-entangled photon pair is such that a biexciton in such a state that the angular momentum is 0 is generated through two-photon resonance induced by irradiating a semiconductor substance, e.g., CuCl, with two parent photons (angular frequency omegai). A photon pair is then generated by splitting the biexciton thus generated simultaneously into two photons (angular frequencies omegas and omegas').
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