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The realization of a functional quantum repeater is one of the major researchgoals in long-distance quantum communication. Among the different approachesthat are being followed, the one relying on quantum memories interfaced withdeterministic quantum emitters is considered as among one of the most promisingsolutions. In this work, we focus on memory-based quantum-repeater schemes thatrely on semiconductor quantum dots for the generation of polarization entangledphotons. Going through the most relevant figures of merit related to efficiencyof the photon source, we select significant developments in fabrication,processing and tuning techniques aimed at combining high degree of entanglementwith on-demand pair generation, with a special focus on the progress achievedin the representative case of the GaAs system. We proceed to offer aperspective on integration with quantum memories, both highlighting preliminaryworks on natural-artificial atomic interfaces and commenting a wide choice ofcurrently available and potentially viable memory solutions in terms ofwavelength, bandwidth and noise-requirements. To complete the overview, we alsopresent recent implementations of entanglement-based quantum communicationprotocols with quantum dots and highlight the next challenges ahead for theimplementation of practical quantum networks.

Quantum dot technology for quantum repeaters: from entangled photon generation towards the integration with quantum memories