Quantum correlations between single telecom photons and a multimode on-demand solid-state quantum memory

Quantum memories are very important in quantum communication and information as they provide a quantum interface between photons, used for long distance communication, and matter, in which stationary qubits can be stored. Moreover they are fundamental building blocks in quantum repeaters. Rare-earth doped crystals (REDC) are promising candidates for the implementation of quantum memories because of their excellent coherence properties at cryogenic temperatures and because solid state offers good prospect for scalability and integration.

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